Vulnerabilities > CVE-2017-15591 - Improper Input Validation vulnerability in XEN

047910
CVSS 4.9 - MEDIUM
Attack vector
LOCAL
Attack complexity
LOW
Privileges required
NONE
Confidentiality impact
NONE
Integrity impact
NONE
Availability impact
COMPLETE
local
low complexity
xen
CWE-20
nessus
NVD
Published: 2017-10-18
Updated: 2018-01-16

Summary

An issue was discovered in Xen 4.5.x through 4.9.x allowing attackers (who control a stub domain kernel or tool stack) to cause a denial of service (host OS crash) because of a missing comparison (of range start to range end) within the DMOP map/unmap implementation.

Vulnerable Configurations

Part Description Count
OS
Xen
18

Common Weakness Enumeration (CWE)

Common Attack Pattern Enumeration and Classification (CAPEC)

  • Buffer Overflow via Environment Variables
    This attack pattern involves causing a buffer overflow through manipulation of environment variables. Once the attacker finds that they can modify an environment variable, they may try to overflow associated buffers. This attack leverages implicit trust often placed in environment variables.
  • Server Side Include (SSI) Injection
    An attacker can use Server Side Include (SSI) Injection to send code to a web application that then gets executed by the web server. Doing so enables the attacker to achieve similar results to Cross Site Scripting, viz., arbitrary code execution and information disclosure, albeit on a more limited scale, since the SSI directives are nowhere near as powerful as a full-fledged scripting language. Nonetheless, the attacker can conveniently gain access to sensitive files, such as password files, and execute shell commands.
  • Cross Zone Scripting
    An attacker is able to cause a victim to load content into their web-browser that bypasses security zone controls and gain access to increased privileges to execute scripting code or other web objects such as unsigned ActiveX controls or applets. This is a privilege elevation attack targeted at zone-based web-browser security. In a zone-based model, pages belong to one of a set of zones corresponding to the level of privilege assigned to that page. Pages in an untrusted zone would have a lesser level of access to the system and/or be restricted in the types of executable content it was allowed to invoke. In a cross-zone scripting attack, a page that should be assigned to a less privileged zone is granted the privileges of a more trusted zone. This can be accomplished by exploiting bugs in the browser, exploiting incorrect configuration in the zone controls, through a cross-site scripting attack that causes the attackers' content to be treated as coming from a more trusted page, or by leveraging some piece of system functionality that is accessible from both the trusted and less trusted zone. This attack differs from "Restful Privilege Escalation" in that the latter correlates to the inadequate securing of RESTful access methods (such as HTTP DELETE) on the server, while cross-zone scripting attacks the concept of security zones as implemented by a browser.
  • Cross Site Scripting through Log Files
    An attacker may leverage a system weakness where logs are susceptible to log injection to insert scripts into the system's logs. If these logs are later viewed by an administrator through a thin administrative interface and the log data is not properly HTML encoded before being written to the page, the attackers' scripts stored in the log will be executed in the administrative interface with potentially serious consequences. This attack pattern is really a combination of two other attack patterns: log injection and stored cross site scripting.
  • Command Line Execution through SQL Injection
    An attacker uses standard SQL injection methods to inject data into the command line for execution. This could be done directly through misuse of directives such as MSSQL_xp_cmdshell or indirectly through injection of data into the database that would be interpreted as shell commands. Sometime later, an unscrupulous backend application (or could be part of the functionality of the same application) fetches the injected data stored in the database and uses this data as command line arguments without performing proper validation. The malicious data escapes that data plane by spawning new commands to be executed on the host.

Nessus

  • NASL familyMisc.
    NASL idXEN_SERVER_XSA-237.NASL
    descriptionAccording to its self-reported version number, the Xen hypervisor installed on the remote host is affected by multiple vulnerabilities related to the setup of PCI MSI interrupts, which may allow an attacker on the guest to cause a denial of service on the host, potentially disclose sensitive information from the host, or potentially gain elevated privileges on the host. Note that Nessus has checked the changeset versions based on the xen.git change log. Nessus did not check guest hardware configurations or if patches were applied manually to the source code before a recompile and reinstall.
    last seen2020-06-01
    modified2020-06-02
    plugin id103972
    published2017-10-19
    reporterThis script is Copyright (C) 2017-2019 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/103972
    titleXen Hypervisor PCI MSI Interrupt Setup Multiple Guest-to-Host Privilege Escalation (XSA-237)
    code
    #
# (C) Tenable Network Security, Inc.
#

include("compat.inc");

if (description)
{
  script_id(103972);
  script_version("1.6");
  script_cvs_date("Date: 2019/11/12");

  script_cve_id(
    "CVE-2017-15588",
    "CVE-2017-15589",
    "CVE-2017-15590",
    "CVE-2017-15591",
    "CVE-2017-15592",
    "CVE-2017-15593",
    "CVE-2017-15594",
    "CVE-2017-15595",
    "CVE-2017-15596"
  );
  script_bugtraq_id(101490, 101496, 101500);
  script_xref(name:"IAVB", value:"2017-B-0142");

  script_name(english:"Xen Hypervisor PCI MSI Interrupt Setup Multiple Guest-to-Host Privilege Escalation (XSA-237)");
  script_summary(english:"Checks 'xl info' output for the Xen hypervisor version.");

  script_set_attribute(attribute:"synopsis", value:
"The remote Xen hypervisor installation is missing a security update.");
  script_set_attribute(attribute:"description", value:
"According to its self-reported version number, the Xen hypervisor
installed on the remote host is affected by multiple vulnerabilities
related to the setup of PCI MSI interrupts, which may allow an
attacker on the guest to cause a denial of service on the host,
potentially disclose sensitive information from the host, or
potentially gain elevated privileges on the host.

Note that Nessus has checked the changeset versions based on the
xen.git change log. Nessus did not check guest hardware configurations
or if patches were applied manually to the source code before a
recompile and reinstall.");
  script_set_attribute(attribute:"see_also", value:"http://xenbits.xen.org/xsa/advisory-237.html");
  script_set_attribute(attribute:"see_also", value:"https://xenbits.xen.org/gitweb/?p=xen.git;a=summary");
  script_set_attribute(attribute:"solution", value:
"Apply the appropriate patch according to the vendor advisory.");
  script_set_cvss_base_vector("CVSS2#AV:L/AC:L/Au:N/C:C/I:C/A:C");
  script_set_cvss_temporal_vector("CVSS2#E:POC/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:P/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2017-15595");

  script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"true");

  script_set_attribute(attribute:"vuln_publication_date", value:"2017/10/12");
  script_set_attribute(attribute:"patch_publication_date", value:"2017/10/12");
  script_set_attribute(attribute:"plugin_publication_date", value:"2017/10/19");

  script_set_attribute(attribute:"potential_vulnerability", value:"true");
  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:xen:xen");
  script_set_attribute(attribute:"stig_severity", value:"I");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_family(english:"Misc.");

  script_copyright(english:"This script is Copyright (C) 2017-2019 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("xen_server_detect.nbin");
  script_require_keys("installed_sw/Xen Hypervisor", "Settings/ParanoidReport");

  exit(0);
}

include("audit.inc");
include("global_settings.inc");
include("install_func.inc");
include("misc_func.inc");

app_name = "Xen Hypervisor";
install  = get_single_install(app_name:app_name);
if (report_paranoia < 2) audit(AUDIT_PARANOID);

version         = install['version'];
display_version = install['display_version'];
path            = install['path'];
managed_status  = install['Managed status'];
changeset       = install['Changeset'];

if (!empty_or_null(changeset))
  display_version += " (changeset " + changeset + ")";

# Installations that are vendor-managed are handled by OS-specific local package checks
if (managed_status == "managed")
  audit(AUDIT_INST_PATH_NOT_VULN, app_name, display_version, path);

# XSA-237
fixes['4.5']['fixed_ver']           = '4.5.5';
fixes['4.5']['fixed_ver_display']   = '4.5.5 (changeset 7afc8ad)';
fixes['4.5']['affected_ver_regex']  = '^4\\.5\\.';
fixes['4.5']['affected_changesets'] = make_list("72c107b", "5659aa5",
  "a224de6", "6442fa9", "db487a6", "709230f", "83724d9", "04b8c4c",
  "0b2ceae", "e3f0768", "d5a5231", "c5b0fe5", "136ff4e", "42c8ba5",
  "d38489d", "df59014", "3217129", "4964e86", "c079597", "6ec173b",
  "a373456", "0780e81", "e5ef76d", "25eaa86", "ae02360", "5597df9",
  "c5de05e", "773094e", "e39a248", "7b3712a", "be35327", "8825df1",
  "d7e3725", "6eb61e4", "b1fcfed", "5779d6a", "afdd77e", "c18367a",
  "7b7fd80", "b30e165", "62ef9b2", "8071724", "235b5d5", "a28b99d",
  "ff294fc", "bc01e2d", "da50922", "386cc94", "139960f", "ec3ddd6",
  "988929a", "1c48dff", "20d4248", "9610422", "cd76cd3", "455fd66",
  "b820c31", "ac3d8bc", "cde86fc", "1678521", "83cb2db", "43d06ef",
  "2b17bf4", "1a2bda5", "0bd7faf", "e3426e2", "37281bc", "27be856",
  "bdf3ef1", "cc325c0", "8e7b84d", "387b8ae", "34fbae7", "1530da2",
  "274a1f6", "b679cfa", "877b760", "cfe165d", "84e4e56", "e4ae4b0");

fixes['4.6']['fixed_ver']           = '4.6.6';
fixes['4.6']['fixed_ver_display']   = '4.6.6 (changeset 9bac910)';
fixes['4.6']['affected_ver_regex']  = '^4\\.6\\.';
fixes['4.6']['affected_changesets'] = make_list("c7a43e3", "913d4f8",
  "c5881c5", "b0239cd", "78fd0c3", "9079e0d", "1658a87", "22b6dfa",
  "a8cd231", "629eddd", "64c03bb", "b4660b4", "1ac8162", "747df3c",
  "5ae011e", "f974d32", "3300ad3", "d708b69");

fixes['4.7']['fixed_ver']           = '4.7.4';
fixes['4.7']['fixed_ver_display']   = '4.7.4-pre (changeset e3f7a64)';
fixes['4.7']['affected_ver_regex']  = '^4\\.7\\.';
fixes['4.7']['affected_changesets'] = make_list("957ad23", "b1ae705",
  "3add76f", "314a8fc", "d6aad63", "7c99633", "145c18d", "c3fa5cd",
  "487f8f9", "ffcfc40", "c7783d9", "3331050", "83966a3", "a67b223",
  "68dbba2", "2728470", "dea68ed", "9d12253", "73d7bc5", "b704b1a",
  "ca4ef7b", "ece330a", "3d63ebc", "30d50f8", "2dc3cdb", "5151257",
  "c9f3ca0", "e873251", "8aebf85", "c362cde", "fece08a");

fixes['4.8']['fixed_ver']           = '4.8.3';
fixes['4.8']['fixed_ver_display']   = '4.8.3-pre (changeset 1960ca8)';
fixes['4.8']['affected_ver_regex']  = '^4\\.8\\.';
fixes['4.8']['affected_changesets'] = make_list("866cfa1", "ddd6e41",
  "370cc9a", "39e3024", "9f092f5", "667f70e", "2116fec", "1a535c3",
  "ee3fc24", "d623d82", "dda458c", "c642b12", "80d7ef3", "ff4f60a",
  "36898eb", "4d7ccae", "e574046", "90dafa4", "c020cf2");

fixes['4.9']['fixed_ver']           = '4.9.1';
fixes['4.9']['fixed_ver_display']   = '4.9.1-pre (changeset 44ceb19)';
fixes['4.9']['affected_ver_regex']  = '^4\\.9\\.';
fixes['4.9']['affected_changesets'] = make_list("ae45442", "784afd9",
  "22032b2", "58da67f", "d1b64cc", "9cde7a8", "1cdcb36", "84c039e",
  "b244ac9", "612044a", "e8fd372", "a568e25", "8fef83e", "478e40c",
  "22ea731", "e7703a2", "91ded3b", "2cc3d32", "79775f5", "43cb0c4",
  "4821228", "d23bcc5", "308654c", "6fd84b3", "89b36cc", "a9ecd60",
  "798f6c9", "6508278", "5587d9a", "527fc5c", "5ff1de3", "692ed82",
  "9bf14bb", "c57b1f9", "6b147fd", "0e186e3", "afc5ebf", "266fc0e",
  "4698106", "f4f02f1", "0fada05", "ab4eb6c", "b29ecc7", "a11d14b",
  "107401e", "1b7834a");

fix = NULL;
foreach ver_branch (keys(fixes))
{
  if (version =~ fixes[ver_branch]['affected_ver_regex'])
  {
    ret = ver_compare(ver:version, fix:fixes[ver_branch]['fixed_ver']);
    if (ret < 0)
      fix = fixes[ver_branch]['fixed_ver_display'];
    else if (ret == 0)
    {
      if (empty_or_null(changeset))
        fix = fixes[ver_branch]['fixed_ver_display'];
      else
        foreach affected_changeset (fixes[ver_branch]['affected_changesets'])
          if (changeset == affected_changeset)
            fix = fixes[ver_branch]['fixed_ver_display'];
    }
  }
}

if (empty_or_null(fix))
  audit(AUDIT_INST_PATH_NOT_VULN, app_name, display_version, path);

items  = make_array("Installed version", display_version,
                    "Fixed version", fix,
                    "Path", path);
order  = make_list("Path", "Installed version", "Fixed version");
report = report_items_str(report_items:items, ordered_fields:order) + '\n';

security_report_v4(port:0, extra:report, severity:SECURITY_HOLE);
  • NASL familySuSE Local Security Checks
    NASL idOPENSUSE-2017-1239.NASL
    descriptionThis update for xen fixes several issues : These security issues were fixed : - CVE-2017-5526: The ES1370 audio device emulation support was vulnerable to a memory leakage issue allowing a privileged user inside the guest to cause a DoS and/or potentially crash the Qemu process on the host (bsc#1059777) - CVE-2017-15593: Missing cleanup in the page type system allowed a malicious or buggy PV guest to cause DoS (XSA-242 bsc#1061084) - CVE-2017-15592: A problem in the shadow pagetable code allowed a malicious or buggy HVM guest to cause DoS or cause hypervisor memory corruption potentially allowing the guest to escalate its privilege (XSA-243 bsc#1061086) - CVE-2017-15594: Problematic handling of the selector fields in the Interrupt Descriptor Table (IDT) allowed a malicious or buggy x86 PV guest to escalate its privileges or cause DoS (XSA-244 bsc#1061087) - CVE-2017-15591: Missing checks in the handling of DMOPs allowed malicious or buggy stub domain kernels or tool stacks otherwise living outside of Domain0 to cause a DoS (XSA-238 bsc#1061077) - CVE-2017-15589: Intercepted I/O write operations with less than a full machine word
    last seen2020-06-05
    modified2017-11-02
    plugin id104349
    published2017-11-02
    reporterThis script is Copyright (C) 2017-2020 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/104349
    titleopenSUSE Security Update : xen (openSUSE-2017-1239)
    code
    #%NASL_MIN_LEVEL 80502
#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from openSUSE Security Update openSUSE-2017-1239.
#
# The text description of this plugin is (C) SUSE LLC.
#

include("compat.inc");

if (description)
{
  script_id(104349);
  script_version("3.4");
  script_set_attribute(attribute:"plugin_modification_date", value:"2020/06/04");

  script_cve_id("CVE-2017-15588", "CVE-2017-15589", "CVE-2017-15590", "CVE-2017-15591", "CVE-2017-15592", "CVE-2017-15593", "CVE-2017-15594", "CVE-2017-15595", "CVE-2017-5526");

  script_name(english:"openSUSE Security Update : xen (openSUSE-2017-1239)");
  script_summary(english:"Check for the openSUSE-2017-1239 patch");

  script_set_attribute(
    attribute:"synopsis", 
    value:"The remote openSUSE host is missing a security update."
  );
  script_set_attribute(
    attribute:"description", 
    value:
"This update for xen fixes several issues :

These security issues were fixed :

  - CVE-2017-5526: The ES1370 audio device emulation support
    was vulnerable to a memory leakage issue allowing a
    privileged user inside the guest to cause a DoS and/or
    potentially crash the Qemu process on the host
    (bsc#1059777)

  - CVE-2017-15593: Missing cleanup in the page type system
    allowed a malicious or buggy PV guest to cause DoS
    (XSA-242 bsc#1061084)

  - CVE-2017-15592: A problem in the shadow pagetable code
    allowed a malicious or buggy HVM guest to cause DoS or
    cause hypervisor memory corruption potentially allowing
    the guest to escalate its privilege (XSA-243
    bsc#1061086)

  - CVE-2017-15594: Problematic handling of the selector
    fields in the Interrupt Descriptor Table (IDT) allowed a
    malicious or buggy x86 PV guest to escalate its
    privileges or cause DoS (XSA-244 bsc#1061087)

  - CVE-2017-15591: Missing checks in the handling of DMOPs
    allowed malicious or buggy stub domain kernels or tool
    stacks otherwise living outside of Domain0 to cause a
    DoS (XSA-238 bsc#1061077)

  - CVE-2017-15589: Intercepted I/O write operations with
    less than a full machine word's worth of data were not
    properly handled, which allowed a malicious unprivileged
    x86 HVM guest to obtain sensitive information from the
    host or other guests (XSA-239 bsc#1061080)

  - CVE-2017-15595: In certain configurations of linear page
    tables a stack overflow might have occured that allowed
    a malicious or buggy PV guest to cause DoS and
    potentially privilege escalation and information leaks
    (XSA-240 bsc#1061081)

  - CVE-2017-15588: Under certain conditions x86 PV guests
    could have caused the hypervisor to miss a necessary TLB
    flush for a page. This allowed a malicious x86 PV guest
    to access all of system memory, allowing for privilege
    escalation, DoS, and information leaks (XSA-241
    bsc#1061082)

  - CVE-2017-15590: Multiple issues existed with the setup
    of PCI MSI interrupts that allowed a malicious or buggy
    guest to cause DoS and potentially privilege escalation
    and information leaks (XSA-237 bsc#1061076)

This non-security issue was fixed :

  - bsc#1057358: Fixed boot when secure boot is enabled

This update was imported from the SUSE:SLE-12-SP2:Update update
project."
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.opensuse.org/show_bug.cgi?id=1027519"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.opensuse.org/show_bug.cgi?id=1057358"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.opensuse.org/show_bug.cgi?id=1059777"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.opensuse.org/show_bug.cgi?id=1061076"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.opensuse.org/show_bug.cgi?id=1061077"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.opensuse.org/show_bug.cgi?id=1061080"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.opensuse.org/show_bug.cgi?id=1061081"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.opensuse.org/show_bug.cgi?id=1061082"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.opensuse.org/show_bug.cgi?id=1061084"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.opensuse.org/show_bug.cgi?id=1061086"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.opensuse.org/show_bug.cgi?id=1061087"
  );
  script_set_attribute(attribute:"solution", value:"Update the affected xen packages.");
  script_set_cvss_base_vector("CVSS2#AV:L/AC:L/Au:N/C:C/I:C/A:C");
  script_set_cvss_temporal_vector("CVSS2#E:POC/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:P/RL:O/RC:C");
  script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"true");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:xen");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:xen-debugsource");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:xen-devel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:xen-doc-html");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:xen-libs");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:xen-libs-32bit");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:xen-libs-debuginfo");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:xen-libs-debuginfo-32bit");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:xen-tools");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:xen-tools-debuginfo");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:xen-tools-domU");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:xen-tools-domU-debuginfo");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:novell:opensuse:42.2");

  script_set_attribute(attribute:"patch_publication_date", value:"2017/11/01");
  script_set_attribute(attribute:"plugin_publication_date", value:"2017/11/02");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"This script is Copyright (C) 2017-2020 and is owned by Tenable, Inc. or an Affiliate thereof.");
  script_family(english:"SuSE Local Security Checks");

  script_dependencies("ssh_get_info.nasl");
  script_require_keys("Host/local_checks_enabled", "Host/SuSE/release", "Host/SuSE/rpm-list", "Host/cpu");

  exit(0);
}


include("audit.inc");
include("global_settings.inc");
include("rpm.inc");

if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
release = get_kb_item("Host/SuSE/release");
if (isnull(release) || release =~ "^(SLED|SLES)") audit(AUDIT_OS_NOT, "openSUSE");
if (release !~ "^(SUSE42\.2)$") audit(AUDIT_OS_RELEASE_NOT, "openSUSE", "42.2", release);
if (!get_kb_item("Host/SuSE/rpm-list")) audit(AUDIT_PACKAGE_LIST_MISSING);

ourarch = get_kb_item("Host/cpu");
if (!ourarch) audit(AUDIT_UNKNOWN_ARCH);
if (ourarch !~ "^(i586|i686|x86_64)$") audit(AUDIT_ARCH_NOT, "i586 / i686 / x86_64", ourarch);

flag = 0;

if ( rpm_check(release:"SUSE42.2", reference:"xen-debugsource-4.7.3_06-11.18.1") ) flag++;
if ( rpm_check(release:"SUSE42.2", reference:"xen-devel-4.7.3_06-11.18.1") ) flag++;
if ( rpm_check(release:"SUSE42.2", reference:"xen-libs-4.7.3_06-11.18.1") ) flag++;
if ( rpm_check(release:"SUSE42.2", reference:"xen-libs-debuginfo-4.7.3_06-11.18.1") ) flag++;
if ( rpm_check(release:"SUSE42.2", reference:"xen-tools-domU-4.7.3_06-11.18.1") ) flag++;
if ( rpm_check(release:"SUSE42.2", reference:"xen-tools-domU-debuginfo-4.7.3_06-11.18.1") ) flag++;
if ( rpm_check(release:"SUSE42.2", cpu:"x86_64", reference:"xen-4.7.3_06-11.18.1") ) flag++;
if ( rpm_check(release:"SUSE42.2", cpu:"x86_64", reference:"xen-doc-html-4.7.3_06-11.18.1") ) flag++;
if ( rpm_check(release:"SUSE42.2", cpu:"x86_64", reference:"xen-libs-32bit-4.7.3_06-11.18.1") ) flag++;
if ( rpm_check(release:"SUSE42.2", cpu:"x86_64", reference:"xen-libs-debuginfo-32bit-4.7.3_06-11.18.1") ) flag++;
if ( rpm_check(release:"SUSE42.2", cpu:"x86_64", reference:"xen-tools-4.7.3_06-11.18.1") ) flag++;
if ( rpm_check(release:"SUSE42.2", cpu:"x86_64", reference:"xen-tools-debuginfo-4.7.3_06-11.18.1") ) flag++;

if (flag)
{
  if (report_verbosity > 0) security_hole(port:0, extra:rpm_report_get());
  else security_hole(0);
  exit(0);
}
else
{
  tested = pkg_tests_get();
  if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
  else audit(AUDIT_PACKAGE_NOT_INSTALLED, "xen-debugsource / xen-devel / xen-libs-32bit / xen-libs / etc");
}
  • NASL familyFedora Local Security Checks
    NASL idFEDORA_2017-5BCDDC1984.NASL
    descriptionxen: various flaws (#1501391) multiple MSI mapping issues on x86 [XSA-237] DMOP map/unmap missing argument checks [XSA-238] hypervisor stack leak in x86 I/O intercept code [XSA-239] Unlimited recursion in linear pagetable de-typing [XSA-240] Stale TLB entry due to page type release race [XSA-241] page type reference leak on x86 [XSA-242] x86: Incorrect handling of self-linear shadow mappings with translated guests [XSA-243] x86: Incorrect handling of IST settings during CPU hotplug [XSA-244] ---- ARM: Some memory not scrubbed at boot [XSA-245] Qemu: vga: reachable assert failure during during display update [CVE-2017-13673] (#1486591) Qemu: vga: OOB read access during display update [CVE-2017-13672] (#1486562) Note that Tenable Network Security has extracted the preceding description block directly from the Fedora update system website. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.
    last seen2020-06-05
    modified2017-11-01
    plugin id104310
    published2017-11-01
    reporterThis script is Copyright (C) 2017-2020 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/104310
    titleFedora 26 : xen (2017-5bcddc1984)
    code
    #%NASL_MIN_LEVEL 80502
#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were  
# extracted from Fedora Security Advisory FEDORA-2017-5bcddc1984.
#

include("compat.inc");

if (description)
{
  script_id(104310);
  script_version("3.5");
  script_set_attribute(attribute:"plugin_modification_date", value:"2020/06/04");

  script_cve_id("CVE-2017-13672", "CVE-2017-13673", "CVE-2017-15588", "CVE-2017-15589", "CVE-2017-15590", "CVE-2017-15591", "CVE-2017-15592", "CVE-2017-15593", "CVE-2017-15594", "CVE-2017-15595");
  script_xref(name:"FEDORA", value:"2017-5bcddc1984");

  script_name(english:"Fedora 26 : xen (2017-5bcddc1984)");
  script_summary(english:"Checks rpm output for the updated package.");

  script_set_attribute(
    attribute:"synopsis", 
    value:"The remote Fedora host is missing a security update."
  );
  script_set_attribute(
    attribute:"description", 
    value:
"xen: various flaws (#1501391) multiple MSI mapping issues on x86
[XSA-237] DMOP map/unmap missing argument checks [XSA-238] hypervisor
stack leak in x86 I/O intercept code [XSA-239] Unlimited recursion in
linear pagetable de-typing [XSA-240] Stale TLB entry due to page type
release race [XSA-241] page type reference leak on x86 [XSA-242] x86:
Incorrect handling of self-linear shadow mappings with translated
guests [XSA-243] x86: Incorrect handling of IST settings during CPU
hotplug [XSA-244]

----

ARM: Some memory not scrubbed at boot [XSA-245] Qemu: vga: reachable
assert failure during during display update [CVE-2017-13673]
(#1486591) Qemu: vga: OOB read access during display update
[CVE-2017-13672] (#1486562)

Note that Tenable Network Security has extracted the preceding
description block directly from the Fedora update system website.
Tenable has attempted to automatically clean and format it as much as
possible without introducing additional issues."
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bodhi.fedoraproject.org/updates/FEDORA-2017-5bcddc1984"
  );
  script_set_attribute(attribute:"solution", value:"Update the affected xen package.");
  script_set_cvss_base_vector("CVSS2#AV:L/AC:L/Au:N/C:C/I:C/A:C");
  script_set_cvss_temporal_vector("CVSS2#E:POC/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:P/RL:O/RC:C");
  script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"true");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:fedoraproject:fedora:xen");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:fedoraproject:fedora:26");

  script_set_attribute(attribute:"vuln_publication_date", value:"2017/08/29");
  script_set_attribute(attribute:"patch_publication_date", value:"2017/10/31");
  script_set_attribute(attribute:"plugin_publication_date", value:"2017/11/01");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"This script is Copyright (C) 2017-2020 and is owned by Tenable, Inc. or an Affiliate thereof.");
  script_family(english:"Fedora Local Security Checks");

  script_dependencies("ssh_get_info.nasl");
  script_require_keys("Host/local_checks_enabled", "Host/RedHat/release", "Host/RedHat/rpm-list");

  exit(0);
}


include("audit.inc");
include("global_settings.inc");
include("rpm.inc");


if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
release = get_kb_item("Host/RedHat/release");
if (isnull(release) || "Fedora" >!< release) audit(AUDIT_OS_NOT, "Fedora");
os_ver = pregmatch(pattern: "Fedora.*release ([0-9]+)", string:release);
if (isnull(os_ver)) audit(AUDIT_UNKNOWN_APP_VER, "Fedora");
os_ver = os_ver[1];
if (! preg(pattern:"^26([^0-9]|$)", string:os_ver)) audit(AUDIT_OS_NOT, "Fedora 26", "Fedora " + os_ver);

if (!get_kb_item("Host/RedHat/rpm-list")) audit(AUDIT_PACKAGE_LIST_MISSING);


cpu = get_kb_item("Host/cpu");
if (isnull(cpu)) audit(AUDIT_UNKNOWN_ARCH);
if ("x86_64" >!< cpu && cpu !~ "^i[3-6]86$") audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, "Fedora", cpu);


flag = 0;
if (rpm_check(release:"FC26", reference:"xen-4.8.2-4.fc26")) flag++;


if (flag)
{
  security_report_v4(
    port       : 0,
    severity   : SECURITY_HOLE,
    extra      : rpm_report_get()
  );
  exit(0);
}
else
{
  tested = pkg_tests_get();
  if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
  else audit(AUDIT_PACKAGE_NOT_INSTALLED, "xen");
}
  • NASL familyGentoo Local Security Checks
    NASL idGENTOO_GLSA-201801-14.NASL
    descriptionThe remote host is affected by the vulnerability described in GLSA-201801-14 (Xen: Multiple vulnerabilities) Multiple vulnerabilities have been discovered in Xen. Please review the referenced CVE identifiers for details. Impact : A local attacker could potentially execute arbitrary code with the privileges of the Xen (QEMU) process on the host, gain privileges on the host system, or cause a Denial of Service condition. Workaround : There is no known workaround at this time.
    last seen2020-06-01
    modified2020-06-02
    plugin id106038
    published2018-01-15
    reporterThis script is Copyright (C) 2018-2019 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/106038
    titleGLSA-201801-14 : Xen: Multiple vulnerabilities
    code
    #
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Gentoo Linux Security Advisory GLSA 201801-14.
#
# The advisory text is Copyright (C) 2001-2018 Gentoo Foundation, Inc.
# and licensed under the Creative Commons - Attribution / Share Alike 
# license. See http://creativecommons.org/licenses/by-sa/3.0/
#

include("compat.inc");

if (description)
{
  script_id(106038);
  script_version("1.3");
  script_cvs_date("Date: 2019/04/05 23:25:06");

  script_cve_id("CVE-2017-12134", "CVE-2017-12135", "CVE-2017-12136", "CVE-2017-12137", "CVE-2017-15588", "CVE-2017-15589", "CVE-2017-15590", "CVE-2017-15591", "CVE-2017-15592", "CVE-2017-15593", "CVE-2017-15594", "CVE-2017-15595", "CVE-2017-17044", "CVE-2017-17045", "CVE-2017-17046", "CVE-2017-17563", "CVE-2017-17564", "CVE-2017-17565", "CVE-2017-17566");
  script_xref(name:"GLSA", value:"201801-14");

  script_name(english:"GLSA-201801-14 : Xen: Multiple vulnerabilities");
  script_summary(english:"Checks for updated package(s) in /var/db/pkg");

  script_set_attribute(
    attribute:"synopsis", 
    value:
"The remote Gentoo host is missing one or more security-related
patches."
  );
  script_set_attribute(
    attribute:"description", 
    value:
"The remote host is affected by the vulnerability described in GLSA-201801-14
(Xen: Multiple vulnerabilities)

    Multiple vulnerabilities have been discovered in Xen. Please review the
      referenced CVE identifiers for details.
  
Impact :

    A local attacker could potentially execute arbitrary code with the
      privileges of the Xen (QEMU) process on the host, gain privileges on the
      host system, or cause a Denial of Service condition.
  
Workaround :

    There is no known workaround at this time."
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://security.gentoo.org/glsa/201801-14"
  );
  script_set_attribute(
    attribute:"solution", 
    value:
"All Xen users should upgrade to the latest version:
      # emerge --sync
      # emerge --ask --oneshot --verbose '>=app-emulation/xen-4.9.1-r1'
    All Xen tools users should upgrade to the latest version:
      # emerge --sync
      # emerge --ask --oneshot --verbose
      '>=app-emulation/xen-tools-4.9.1-r1'"
  );
  script_set_cvss_base_vector("CVSS2#AV:L/AC:L/Au:N/C:C/I:C/A:C");
  script_set_cvss_temporal_vector("CVSS2#E:POC/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:P/RL:O/RC:C");
  script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"true");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:gentoo:linux:xen");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:gentoo:linux:xen-tools");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:gentoo:linux");

  script_set_attribute(attribute:"patch_publication_date", value:"2018/01/14");
  script_set_attribute(attribute:"plugin_publication_date", value:"2018/01/15");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"This script is Copyright (C) 2018-2019 and is owned by Tenable, Inc. or an Affiliate thereof.");
  script_family(english:"Gentoo Local Security Checks");

  script_dependencies("ssh_get_info.nasl");
  script_require_keys("Host/local_checks_enabled", "Host/Gentoo/release", "Host/Gentoo/qpkg-list");

  exit(0);
}


include("audit.inc");
include("global_settings.inc");
include("qpkg.inc");

if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
if (!get_kb_item("Host/Gentoo/release")) audit(AUDIT_OS_NOT, "Gentoo");
if (!get_kb_item("Host/Gentoo/qpkg-list")) audit(AUDIT_PACKAGE_LIST_MISSING);


flag = 0;

if (qpkg_check(package:"app-emulation/xen", unaffected:make_list("ge 4.9.1-r1"), vulnerable:make_list("lt 4.9.1-r1"))) flag++;
if (qpkg_check(package:"app-emulation/xen-tools", unaffected:make_list("ge 4.9.1-r1"), vulnerable:make_list("lt 4.9.1-r1"))) flag++;

if (flag)
{
  if (report_verbosity > 0) security_hole(port:0, extra:qpkg_report_get());
  else security_hole(0);
  exit(0);
}
else
{
  tested = qpkg_tests_get();
  if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
  else audit(AUDIT_PACKAGE_NOT_INSTALLED, "Xen");
}
  • NASL familyFedora Local Security Checks
    NASL idFEDORA_2017-C432DB2971.NASL
    descriptionxen: various flaws (#1501391) multiple MSI mapping issues on x86 [XSA-237] DMOP map/unmap missing argument checks [XSA-238] hypervisor stack leak in x86 I/O intercept code [XSA-239] Unlimited recursion in linear pagetable de-typing [XSA-240] Stale TLB entry due to page type release race [XSA-241] page type reference leak on x86 [XSA-242] x86: Incorrect handling of self-linear shadow mappings with translated guests [XSA-243] x86: Incorrect handling of IST settings during CPU hotplug [XSA-244] Note that Tenable Network Security has extracted the preceding description block directly from the Fedora update system website. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.
    last seen2020-06-05
    modified2018-01-15
    plugin id105971
    published2018-01-15
    reporterThis script is Copyright (C) 2018-2020 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/105971
    titleFedora 27 : xen (2017-c432db2971)
    code
    #%NASL_MIN_LEVEL 80502
#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were  
# extracted from Fedora Security Advisory FEDORA-2017-c432db2971.
#

include("compat.inc");

if (description)
{
  script_id(105971);
  script_version("1.5");
  script_set_attribute(attribute:"plugin_modification_date", value:"2020/06/04");

  script_cve_id("CVE-2017-15588", "CVE-2017-15589", "CVE-2017-15590", "CVE-2017-15591", "CVE-2017-15592", "CVE-2017-15593", "CVE-2017-15594", "CVE-2017-15595");
  script_xref(name:"FEDORA", value:"2017-c432db2971");

  script_name(english:"Fedora 27 : xen (2017-c432db2971)");
  script_summary(english:"Checks rpm output for the updated package.");

  script_set_attribute(
    attribute:"synopsis", 
    value:"The remote Fedora host is missing a security update."
  );
  script_set_attribute(
    attribute:"description", 
    value:
"xen: various flaws (#1501391) multiple MSI mapping issues on x86
[XSA-237] DMOP map/unmap missing argument checks [XSA-238] hypervisor
stack leak in x86 I/O intercept code [XSA-239] Unlimited recursion in
linear pagetable de-typing [XSA-240] Stale TLB entry due to page type
release race [XSA-241] page type reference leak on x86 [XSA-242] x86:
Incorrect handling of self-linear shadow mappings with translated
guests [XSA-243] x86: Incorrect handling of IST settings during CPU
hotplug [XSA-244]

Note that Tenable Network Security has extracted the preceding
description block directly from the Fedora update system website.
Tenable has attempted to automatically clean and format it as much as
possible without introducing additional issues."
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bodhi.fedoraproject.org/updates/FEDORA-2017-c432db2971"
  );
  script_set_attribute(attribute:"solution", value:"Update the affected xen package.");
  script_set_cvss_base_vector("CVSS2#AV:L/AC:L/Au:N/C:C/I:C/A:C");
  script_set_cvss_temporal_vector("CVSS2#E:POC/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:P/RL:O/RC:C");
  script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"true");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:fedoraproject:fedora:xen");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:fedoraproject:fedora:27");

  script_set_attribute(attribute:"vuln_publication_date", value:"2017/10/18");
  script_set_attribute(attribute:"patch_publication_date", value:"2017/11/11");
  script_set_attribute(attribute:"plugin_publication_date", value:"2018/01/15");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"This script is Copyright (C) 2018-2020 and is owned by Tenable, Inc. or an Affiliate thereof.");
  script_family(english:"Fedora Local Security Checks");

  script_dependencies("ssh_get_info.nasl");
  script_require_keys("Host/local_checks_enabled", "Host/RedHat/release", "Host/RedHat/rpm-list");

  exit(0);
}


include("audit.inc");
include("global_settings.inc");
include("rpm.inc");


if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
release = get_kb_item("Host/RedHat/release");
if (isnull(release) || "Fedora" >!< release) audit(AUDIT_OS_NOT, "Fedora");
os_ver = pregmatch(pattern: "Fedora.*release ([0-9]+)", string:release);
if (isnull(os_ver)) audit(AUDIT_UNKNOWN_APP_VER, "Fedora");
os_ver = os_ver[1];
if (! preg(pattern:"^27([^0-9]|$)", string:os_ver)) audit(AUDIT_OS_NOT, "Fedora 27", "Fedora " + os_ver);

if (!get_kb_item("Host/RedHat/rpm-list")) audit(AUDIT_PACKAGE_LIST_MISSING);


cpu = get_kb_item("Host/cpu");
if (isnull(cpu)) audit(AUDIT_UNKNOWN_ARCH);
if ("x86_64" >!< cpu && cpu !~ "^i[3-6]86$") audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, "Fedora", cpu);


flag = 0;
if (rpm_check(release:"FC27", reference:"xen-4.9.0-12.fc27")) flag++;


if (flag)
{
  security_report_v4(
    port       : 0,
    severity   : SECURITY_HOLE,
    extra      : rpm_report_get()
  );
  exit(0);
}
else
{
  tested = pkg_tests_get();
  if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
  else audit(AUDIT_PACKAGE_NOT_INSTALLED, "xen");
}
  • NASL familySuSE Local Security Checks
    NASL idSUSE_SU-2017-2873-1.NASL
    descriptionThis update for xen fixes several issues: These security issues were fixed : - CVE-2017-5526: The ES1370 audio device emulation support was vulnerable to a memory leakage issue allowing a privileged user inside the guest to cause a DoS and/or potentially crash the Qemu process on the host (bsc#1059777) - CVE-2017-15593: Missing cleanup in the page type system allowed a malicious or buggy PV guest to cause DoS (XSA-242 bsc#1061084) - CVE-2017-15592: A problem in the shadow pagetable code allowed a malicious or buggy HVM guest to cause DoS or cause hypervisor memory corruption potentially allowing the guest to escalate its privilege (XSA-243 bsc#1061086) - CVE-2017-15594: Problematic handling of the selector fields in the Interrupt Descriptor Table (IDT) allowed a malicious or buggy x86 PV guest to escalate its privileges or cause DoS (XSA-244 bsc#1061087) - CVE-2017-15591: Missing checks in the handling of DMOPs allowed malicious or buggy stub domain kernels or tool stacks otherwise living outside of Domain0 to cause a DoS (XSA-238 bsc#1061077) - CVE-2017-15589: Intercepted I/O write operations with less than a full machine word
    last seen2020-06-01
    modified2020-06-02
    plugin id104255
    published2017-10-30
    reporterThis script is Copyright (C) 2017-2019 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/104255
    titleSUSE SLES12 Security Update : xen (SUSE-SU-2017:2873-1)
    code
    #
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from SUSE update advisory SUSE-SU-2017:2873-1.
# The text itself is copyright (C) SUSE.
#

include("compat.inc");

if (description)
{
  script_id(104255);
  script_version("3.7");
  script_cvs_date("Date: 2019/09/11 11:22:16");

  script_cve_id("CVE-2017-15588", "CVE-2017-15589", "CVE-2017-15590", "CVE-2017-15591", "CVE-2017-15592", "CVE-2017-15593", "CVE-2017-15594", "CVE-2017-15595", "CVE-2017-5526");

  script_name(english:"SUSE SLES12 Security Update : xen (SUSE-SU-2017:2873-1)");
  script_summary(english:"Checks rpm output for the updated packages.");

  script_set_attribute(
    attribute:"synopsis", 
    value:"The remote SUSE host is missing one or more security updates."
  );
  script_set_attribute(
    attribute:"description", 
    value:
"This update for xen fixes several issues: These security issues were
fixed :

  - CVE-2017-5526: The ES1370 audio device emulation support
    was vulnerable to a memory leakage issue allowing a
    privileged user inside the guest to cause a DoS and/or
    potentially crash the Qemu process on the host
    (bsc#1059777)

  - CVE-2017-15593: Missing cleanup in the page type system
    allowed a malicious or buggy PV guest to cause DoS
    (XSA-242 bsc#1061084)

  - CVE-2017-15592: A problem in the shadow pagetable code
    allowed a malicious or buggy HVM guest to cause DoS or
    cause hypervisor memory corruption potentially allowing
    the guest to escalate its privilege (XSA-243
    bsc#1061086)

  - CVE-2017-15594: Problematic handling of the selector
    fields in the Interrupt Descriptor Table (IDT) allowed a
    malicious or buggy x86 PV guest to escalate its
    privileges or cause DoS (XSA-244 bsc#1061087)

  - CVE-2017-15591: Missing checks in the handling of DMOPs
    allowed malicious or buggy stub domain kernels or tool
    stacks otherwise living outside of Domain0 to cause a
    DoS (XSA-238 bsc#1061077)

  - CVE-2017-15589: Intercepted I/O write operations with
    less than a full machine word's worth of data were not
    properly handled, which allowed a malicious unprivileged
    x86 HVM guest to obtain sensitive information from the
    host or other guests (XSA-239 bsc#1061080)

  - CVE-2017-15595: In certain configurations of linear page
    tables a stack overflow might have occured that allowed
    a malicious or buggy PV guest to cause DoS and
    potentially privilege escalation and information leaks
    (XSA-240 bsc#1061081)

  - CVE-2017-15588: Under certain conditions x86 PV guests
    could have caused the hypervisor to miss a necessary TLB
    flush for a page. This allowed a malicious x86 PV guest
    to access all of system memory, allowing for privilege
    escalation, DoS, and information leaks (XSA-241
    bsc#1061082)

  - CVE-2017-15590: Multiple issues existed with the setup
    of PCI MSI interrupts that allowed a malicious or buggy
    guest to cause DoS and potentially privilege escalation
    and information leaks (XSA-237 bsc#1061076)

Note that Tenable Network Security has extracted the preceding
description block directly from the SUSE security advisory. Tenable
has attempted to automatically clean and format it as much as possible
without introducing additional issues."
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.suse.com/show_bug.cgi?id=1059777"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.suse.com/show_bug.cgi?id=1061076"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.suse.com/show_bug.cgi?id=1061077"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.suse.com/show_bug.cgi?id=1061080"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.suse.com/show_bug.cgi?id=1061081"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.suse.com/show_bug.cgi?id=1061082"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.suse.com/show_bug.cgi?id=1061084"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.suse.com/show_bug.cgi?id=1061086"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.suse.com/show_bug.cgi?id=1061087"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://www.suse.com/security/cve/CVE-2017-15588/"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://www.suse.com/security/cve/CVE-2017-15589/"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://www.suse.com/security/cve/CVE-2017-15590/"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://www.suse.com/security/cve/CVE-2017-15591/"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://www.suse.com/security/cve/CVE-2017-15592/"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://www.suse.com/security/cve/CVE-2017-15593/"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://www.suse.com/security/cve/CVE-2017-15594/"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://www.suse.com/security/cve/CVE-2017-15595/"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://www.suse.com/security/cve/CVE-2017-5526/"
  );
  # https://www.suse.com/support/update/announcement/2017/suse-su-20172873-1/
  script_set_attribute(
    attribute:"see_also",
    value:"http://www.nessus.org/u?03397077"
  );
  script_set_attribute(
    attribute:"solution", 
    value:
"To install this SUSE Security Update use YaST online_update.
Alternatively you can run the command listed for your product :

SUSE OpenStack Cloud 6:zypper in -t patch
SUSE-OpenStack-Cloud-6-2017-1795=1

SUSE Linux Enterprise Server for SAP 12-SP1:zypper in -t patch
SUSE-SLE-SAP-12-SP1-2017-1795=1

SUSE Linux Enterprise Server 12-SP1-LTSS:zypper in -t patch
SUSE-SLE-SERVER-12-SP1-2017-1795=1

To bring your system up-to-date, use 'zypper patch'."
  );
  script_set_cvss_base_vector("CVSS2#AV:L/AC:L/Au:N/C:C/I:C/A:C");
  script_set_cvss_temporal_vector("CVSS2#E:POC/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:P/RL:O/RC:C");
  script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"true");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:xen");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:xen-debugsource");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:xen-doc-html");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:xen-kmp-default");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:xen-kmp-default-debuginfo");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:xen-libs");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:xen-libs-debuginfo");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:xen-tools");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:xen-tools-debuginfo");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:xen-tools-domU");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:xen-tools-domU-debuginfo");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:novell:suse_linux:12");

  script_set_attribute(attribute:"vuln_publication_date", value:"2017/03/15");
  script_set_attribute(attribute:"patch_publication_date", value:"2017/10/27");
  script_set_attribute(attribute:"plugin_publication_date", value:"2017/10/30");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"This script is Copyright (C) 2017-2019 and is owned by Tenable, Inc. or an Affiliate thereof.");
  script_family(english:"SuSE Local Security Checks");

  script_dependencies("ssh_get_info.nasl");
  script_require_keys("Host/local_checks_enabled", "Host/cpu", "Host/SuSE/release", "Host/SuSE/rpm-list");

  exit(0);
}


include("audit.inc");
include("global_settings.inc");
include("rpm.inc");


if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
release = get_kb_item("Host/SuSE/release");
if (isnull(release) || release !~ "^(SLED|SLES)") audit(AUDIT_OS_NOT, "SUSE");
os_ver = pregmatch(pattern: "^(SLE(S|D)\d+)", string:release);
if (isnull(os_ver)) audit(AUDIT_UNKNOWN_APP_VER, "SUSE");
os_ver = os_ver[1];
if (! preg(pattern:"^(SLES12)$", string:os_ver)) audit(AUDIT_OS_NOT, "SUSE SLES12", "SUSE " + os_ver);

if (!get_kb_item("Host/SuSE/rpm-list")) audit(AUDIT_PACKAGE_LIST_MISSING);

cpu = get_kb_item("Host/cpu");
if (isnull(cpu)) audit(AUDIT_UNKNOWN_ARCH);
if (cpu !~ "^i[3-6]86$" && "x86_64" >!< cpu && "s390x" >!< cpu) audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, "SUSE " + os_ver, cpu);
if (cpu >!< "x86_64") audit(AUDIT_ARCH_NOT, "x86_64", cpu);


sp = get_kb_item("Host/SuSE/patchlevel");
if (isnull(sp)) sp = "0";
if (os_ver == "SLES12" && (! preg(pattern:"^(1)$", string:sp))) audit(AUDIT_OS_NOT, "SLES12 SP1", os_ver + " SP" + sp);


flag = 0;
if (rpm_check(release:"SLES12", sp:"1", cpu:"x86_64", reference:"xen-4.5.5_18-22.31.1")) flag++;
if (rpm_check(release:"SLES12", sp:"1", cpu:"x86_64", reference:"xen-debugsource-4.5.5_18-22.31.1")) flag++;
if (rpm_check(release:"SLES12", sp:"1", cpu:"x86_64", reference:"xen-doc-html-4.5.5_18-22.31.1")) flag++;
if (rpm_check(release:"SLES12", sp:"1", cpu:"x86_64", reference:"xen-kmp-default-4.5.5_18_k3.12.74_60.64.60-22.31.1")) flag++;
if (rpm_check(release:"SLES12", sp:"1", cpu:"x86_64", reference:"xen-kmp-default-debuginfo-4.5.5_18_k3.12.74_60.64.60-22.31.1")) flag++;
if (rpm_check(release:"SLES12", sp:"1", cpu:"x86_64", reference:"xen-libs-32bit-4.5.5_18-22.31.1")) flag++;
if (rpm_check(release:"SLES12", sp:"1", cpu:"x86_64", reference:"xen-libs-4.5.5_18-22.31.1")) flag++;
if (rpm_check(release:"SLES12", sp:"1", cpu:"x86_64", reference:"xen-libs-debuginfo-32bit-4.5.5_18-22.31.1")) flag++;
if (rpm_check(release:"SLES12", sp:"1", cpu:"x86_64", reference:"xen-libs-debuginfo-4.5.5_18-22.31.1")) flag++;
if (rpm_check(release:"SLES12", sp:"1", cpu:"x86_64", reference:"xen-tools-4.5.5_18-22.31.1")) flag++;
if (rpm_check(release:"SLES12", sp:"1", cpu:"x86_64", reference:"xen-tools-debuginfo-4.5.5_18-22.31.1")) flag++;
if (rpm_check(release:"SLES12", sp:"1", cpu:"x86_64", reference:"xen-tools-domU-4.5.5_18-22.31.1")) flag++;
if (rpm_check(release:"SLES12", sp:"1", cpu:"x86_64", reference:"xen-tools-domU-debuginfo-4.5.5_18-22.31.1")) flag++;


if (flag)
{
  if (report_verbosity > 0) security_hole(port:0, extra:rpm_report_get());
  else security_hole(0);
  exit(0);
}
else
{
  tested = pkg_tests_get();
  if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
  else audit(AUDIT_PACKAGE_NOT_INSTALLED, "xen");
}
  • NASL familyMisc.
    NASL idXEN_SERVER_XSA-241.NASL
    descriptionAccording to its self-reported version number, the Xen hypervisor installed on the remote host is affected by a race condition that is triggered when handling TLB flush requests. This allows an attacker on the guest to access all system memory, allowing them to cause a denial of service, disclose sensitive information, or gain elevated privileges on the host. Note that Nessus has checked the changeset versions based on the xen.git change log. Nessus did not check guest hardware configurations or if patches were applied manually to the source code before a recompile and reinstall.
    last seen2020-06-01
    modified2020-06-02
    plugin id103976
    published2017-10-19
    reporterThis script is Copyright (C) 2017-2019 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/103976
    titleXen Hypervisor TLB Flush Request Handling Race Condition System Memory Access Guest-to-Host Privilege Escalation (XSA-241)
    code
    #
# (C) Tenable Network Security, Inc.
#

include("compat.inc");

if (description)
{
  script_id(103976);
  script_version("1.6");
  script_cvs_date("Date: 2019/11/12");

  script_cve_id(
    "CVE-2017-15588",
    "CVE-2017-15589",
    "CVE-2017-15590",
    "CVE-2017-15591",
    "CVE-2017-15592",
    "CVE-2017-15593",
    "CVE-2017-15594",
    "CVE-2017-15595",
    "CVE-2017-15596"
  );
  script_bugtraq_id(101490, 101496, 101500);
  script_xref(name:"IAVB", value:"2017-B-0142");

  script_name(english:"Xen Hypervisor TLB Flush Request Handling Race Condition System Memory Access Guest-to-Host Privilege Escalation (XSA-241)");
  script_summary(english:"Checks 'xl info' output for the Xen hypervisor version.");

  script_set_attribute(attribute:"synopsis", value:
"The remote Xen hypervisor installation is missing a security update.");
  script_set_attribute(attribute:"description", value:
"According to its self-reported version number, the Xen hypervisor
installed on the remote host is affected by a race condition that is
triggered when handling TLB flush requests. This allows an attacker on
the guest to access all system memory,  allowing them to cause a
denial of service, disclose sensitive information, or gain elevated
privileges on the host.

Note that Nessus has checked the changeset versions based on the
xen.git change log. Nessus did not check guest hardware configurations
or if patches were applied manually to the source code before a
recompile and reinstall.");
  script_set_attribute(attribute:"see_also", value:"http://xenbits.xen.org/xsa/advisory-241.html");
  script_set_attribute(attribute:"see_also", value:"https://xenbits.xen.org/gitweb/?p=xen.git;a=summary");
  script_set_attribute(attribute:"solution", value:
"Apply the appropriate patch according to the vendor advisory.");
  script_set_cvss_base_vector("CVSS2#AV:L/AC:L/Au:N/C:C/I:C/A:C");
  script_set_cvss_temporal_vector("CVSS2#E:POC/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:P/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2017-15595");

  script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"true");

  script_set_attribute(attribute:"vuln_publication_date", value:"2017/10/12");
  script_set_attribute(attribute:"patch_publication_date", value:"2017/10/12");
  script_set_attribute(attribute:"plugin_publication_date", value:"2017/10/19");

  script_set_attribute(attribute:"potential_vulnerability", value:"true");
  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:xen:xen");
  script_set_attribute(attribute:"stig_severity", value:"I");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_family(english:"Misc.");

  script_copyright(english:"This script is Copyright (C) 2017-2019 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("xen_server_detect.nbin");
  script_require_keys("installed_sw/Xen Hypervisor", "Settings/ParanoidReport");

  exit(0);
}

include("audit.inc");
include("global_settings.inc");
include("install_func.inc");
include("misc_func.inc");

app_name = "Xen Hypervisor";
install  = get_single_install(app_name:app_name);
if (report_paranoia < 2) audit(AUDIT_PARANOID);

version         = install['version'];
display_version = install['display_version'];
path            = install['path'];
managed_status  = install['Managed status'];
changeset       = install['Changeset'];

if (!empty_or_null(changeset))
  display_version += " (changeset " + changeset + ")";

# Installations that are vendor-managed are handled by OS-specific local package checks
if (managed_status == "managed")
  audit(AUDIT_INST_PATH_NOT_VULN, app_name, display_version, path);

# XSA-241
fixes['4.5']['fixed_ver']           = '4.5.5';
fixes['4.5']['fixed_ver_display']   = '4.5.5 (changeset da4f24d)';
fixes['4.5']['affected_ver_regex']  = '^4\\.5\\.';
fixes['4.5']['affected_changesets'] = make_list("b7582ac", "196371c",
  "7afc8ad", "72c107b", "5659aa5", "a224de6", "6442fa9", "db487a6",
  "709230f", "83724d9", "04b8c4c", "0b2ceae", "e3f0768", "d5a5231",
  "c5b0fe5", "136ff4e", "42c8ba5", "d38489d", "df59014", "3217129",
  "4964e86", "c079597", "6ec173b", "a373456", "0780e81", "e5ef76d",
  "25eaa86", "ae02360", "5597df9", "c5de05e", "773094e", "e39a248",
  "7b3712a", "be35327", "8825df1", "d7e3725", "6eb61e4", "b1fcfed",
  "5779d6a", "afdd77e", "c18367a", "7b7fd80", "b30e165", "62ef9b2",
  "8071724", "235b5d5", "a28b99d", "ff294fc", "bc01e2d", "da50922",
  "386cc94", "139960f", "ec3ddd6", "988929a", "1c48dff", "20d4248",
  "9610422", "cd76cd3", "455fd66", "b820c31", "ac3d8bc", "cde86fc",
  "1678521", "83cb2db", "43d06ef", "2b17bf4", "1a2bda5", "0bd7faf",
  "e3426e2", "37281bc", "27be856", "bdf3ef1", "cc325c0", "8e7b84d",
  "387b8ae", "34fbae7", "1530da2", "274a1f6", "b679cfa", "877b760",
  "cfe165d", "84e4e56", "e4ae4b0");

fixes['4.6']['fixed_ver']           = '4.6.6';
fixes['4.6']['fixed_ver_display']   = '4.6.6 (changeset 57318e1)';
fixes['4.6']['affected_ver_regex']  = '^4\\.6\\.';
fixes['4.6']['affected_changesets'] = make_list("9f22d72", "e0353b4",
  "76f1549", "9bac910", "c7a43e3", "913d4f8", "c5881c5", "b0239cd",
  "78fd0c3", "9079e0d", "1658a87", "22b6dfa", "a8cd231", "629eddd",
  "64c03bb", "b4660b4", "1ac8162", "747df3c", "5ae011e", "f974d32",
  "3300ad3", "d708b69");

fixes['4.7']['fixed_ver']           = '4.7.4';
fixes['4.7']['fixed_ver_display']   = '4.7.4-pre (changeset 5ca7d11)';
fixes['4.7']['affected_ver_regex']  = '^4\\.7\\.';
fixes['4.7']['affected_changesets'] = make_list("ebd47d4", "6a6a339",
  "e61be54", "e3f7a64", "957ad23", "b1ae705", "3add76f", "314a8fc",
  "d6aad63", "7c99633", "145c18d", "c3fa5cd", "487f8f9", "ffcfc40",
  "c7783d9", "3331050", "83966a3", "a67b223", "68dbba2", "2728470",
  "dea68ed", "9d12253", "73d7bc5", "b704b1a", "ca4ef7b", "ece330a",
  "3d63ebc", "30d50f8", "2dc3cdb", "5151257", "c9f3ca0", "e873251",
  "8aebf85", "c362cde", "fece08a");

fixes['4.8']['fixed_ver']           = '4.8.3';
fixes['4.8']['fixed_ver_display']   = '4.8.3-pre (changeset df89197)';
fixes['4.8']['affected_ver_regex']  = '^4\\.8\\.';
fixes['4.8']['affected_changesets'] = make_list("c4f969d", "b1f3f1d",
  "7251c06", "1960ca8", "866cfa1", "ddd6e41", "370cc9a", "39e3024",
  "9f092f5", "667f70e", "2116fec", "1a535c3", "ee3fc24", "d623d82",
  "dda458c", "c642b12", "80d7ef3", "ff4f60a", "36898eb", "4d7ccae",
  "e574046", "90dafa4", "c020cf2");

fixes['4.9']['fixed_ver']           = '4.9.1';
fixes['4.9']['fixed_ver_display']   = '4.9.1-pre (changeset 61a2d31)';
fixes['4.9']['affected_ver_regex']  = '^4\\.9\\.';
fixes['4.9']['affected_changesets'] = make_list("c2b0a92", "d842630",
  "ef61bcf", "44ceb19", "ae45442", "784afd9", "22032b2", "58da67f",
  "d1b64cc", "9cde7a8", "1cdcb36", "84c039e", "b244ac9", "612044a",
  "e8fd372", "a568e25", "8fef83e", "478e40c", "22ea731", "e7703a2",
  "91ded3b", "2cc3d32", "79775f5", "43cb0c4", "4821228", "d23bcc5",
  "308654c", "6fd84b3", "89b36cc", "a9ecd60", "798f6c9", "6508278",
  "5587d9a", "527fc5c", "5ff1de3", "692ed82", "9bf14bb", "c57b1f9",
  "6b147fd", "0e186e3", "afc5ebf", "266fc0e", "4698106", "f4f02f1",
  "0fada05", "ab4eb6c", "b29ecc7", "a11d14b", "107401e", "1b7834a");

fix = NULL;
foreach ver_branch (keys(fixes))
{
  if (version =~ fixes[ver_branch]['affected_ver_regex'])
  {
    ret = ver_compare(ver:version, fix:fixes[ver_branch]['fixed_ver']);
    if (ret < 0)
      fix = fixes[ver_branch]['fixed_ver_display'];
    else if (ret == 0)
    {
      if (empty_or_null(changeset))
        fix = fixes[ver_branch]['fixed_ver_display'];
      else
        foreach affected_changeset (fixes[ver_branch]['affected_changesets'])
          if (changeset == affected_changeset)
            fix = fixes[ver_branch]['fixed_ver_display'];
    }
  }
}

if (empty_or_null(fix))
  audit(AUDIT_INST_PATH_NOT_VULN, app_name, display_version, path);

items  = make_array("Installed version", display_version,
                    "Fixed version", fix,
                    "Path", path);
order  = make_list("Path", "Installed version", "Fixed version");
report = report_items_str(report_items:items, ordered_fields:order) + '\n';

security_report_v4(port:0, extra:report, severity:SECURITY_HOLE);
  • NASL familyMisc.
    NASL idXEN_SERVER_XSA-238.NASL
    descriptionAccording to its self-reported version number, the Xen hypervisor installed on the remote host is affected by unspecified flaws in arch/x86/hvm/ioreq.c that is triggered when handling DMOPs. This may allow an attacker within a guest to consume excessive resources. Note this can only be exploited by domains controlling HVM guests. Note that Nessus has checked the changeset versions based on the xen.git change log. Nessus did not check guest hardware configurations or if patches were applied manually to the source code before a recompile and reinstall.
    last seen2020-06-01
    modified2020-06-02
    plugin id103973
    published2017-10-19
    reporterThis script is Copyright (C) 2017-2019 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/103973
    titleXen Hypervisor Multiple Functions DMOP Handling Guest-to-Host DoS (XSA-238)
  • NASL familyMisc.
    NASL idXEN_SERVER_XSA-243.NASL
    descriptionAccording to its self-reported version number, the Xen hypervisor installed on the remote host is affected by an unspecified flaw in mm/shadow/multi.c that is triggered during the handling of self-linear shadow mappings with translated guests. This may allow an attacker on the guest to cause a denial of service or gain elevated privileges on the host. Note that Nessus has checked the changeset versions based on the xen.git change log. Nessus did not check guest hardware configurations or if patches were applied manually to the source code before a recompile and reinstall.
    last seen2020-06-01
    modified2020-06-02
    plugin id103978
    published2017-10-19
    reporterThis script is Copyright (C) 2017-2019 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/103978
    titleXen Hypervisor Translated Guest Self-linear Shadow Mapping Handling Guest-to-Host Privilege Escalation (XSA-243)
  • NASL familyMisc.
    NASL idXEN_SERVER_XSA-240.NASL
    descriptionAccording to its self-reported version number, the Xen hypervisor installed on the remote host is affected by a stack overflow vulnerability that is triggered when recursion is not properly handled when de-typing linear pagetables. By stacking multiple layers of page tables, an attacker within a guest can cause a stack overflow, resulting in the Xen process to crash. Note that Nessus has checked the changeset versions based on the xen.git change log. Nessus did not check guest hardware configurations or if patches were applied manually to the source code before a recompile and reinstall.
    last seen2020-06-01
    modified2020-06-02
    plugin id103975
    published2017-10-19
    reporterThis script is Copyright (C) 2017-2019 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/103975
    titleXen Hypervisor Pagetable De-typing Recursion Handling Guest-to-Host DoS (XSA-240)
  • NASL familyMisc.
    NASL idXEN_SERVER_XSA-239.NASL
    descriptionAccording to its self-reported version number, the Xen hypervisor installed on the remote host is affected by an unspecified flaw in the hvmemul_do_io() function in arch/x86/hvm/emulate.c that is triggered as an internal structure may contain data from an uninitialized hypervisor stack slot. This may allow an attacker on the guest to gain access to potentially sensitive information from the host. Note that Nessus has checked the changeset versions based on the xen.git change log. Nessus did not check guest hardware configurations or if patches were applied manually to the source code before a recompile and reinstall.
    last seen2020-06-01
    modified2020-06-02
    plugin id103974
    published2017-10-19
    reporterThis script is Copyright (C) 2017-2019 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/103974
    titleXen Hypervisor I/O Intercept Code Hypervisor Stack Guest-to-Host Information Disclosure (XSA-239)
  • NASL familyMisc.
    NASL idXEN_SERVER_XSA-244.NASL
    descriptionAccording to its self-reported version number, the Xen hypervisor installed on the remote host is affected by an unspecified flaw that is triggered when, as a new CPU is brought online, it copies certain selector fields from CPU0
    last seen2020-06-01
    modified2020-06-02
    plugin id103979
    published2017-10-19
    reporterThis script is Copyright (C) 2017-2019 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/103979
    titleXen Hypervisor New CPU Interrupt Descriptor Table (IDT) Copy Handling Guest-to-Host Privilege Escalation (XSA-244)
  • NASL familyFedora Local Security Checks
    NASL idFEDORA_2017-D4709B0D8B.NASL
    descriptionxen: various flaws (#1501391) multiple MSI mapping issues on x86 [XSA-237] DMOP map/unmap missing argument checks [XSA-238] hypervisor stack leak in x86 I/O intercept code [XSA-239] Unlimited recursion in linear pagetable de-typing [XSA-240] Stale TLB entry due to page type release race [XSA-241] page type reference leak on x86 [XSA-242] x86: Incorrect handling of self-linear shadow mappings with translated guests [XSA-243] x86: Incorrect handling of IST settings during CPU hotplug [XSA-244] ---- ARM: Some memory not scrubbed at boot [XSA-245] Qemu: vga: reachable assert failure during during display update [CVE-2017-13673] (#1486591) Qemu: vga: OOB read access during display update [CVE-2017-13672] (#1486562) Note that Tenable Network Security has extracted the preceding description block directly from the Fedora update system website. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.
    last seen2020-06-05
    modified2017-11-02
    plugin id104347
    published2017-11-02
    reporterThis script is Copyright (C) 2017-2020 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/104347
    titleFedora 25 : xen (2017-d4709b0d8b)
  • NASL familySuSE Local Security Checks
    NASL idOPENSUSE-2017-1181.NASL
    descriptionThis update for xen fixes several issues : These security issues were fixed : - CVE-2017-5526: The ES1370 audio device emulation support was vulnerable to a memory leakage issue allowing a privileged user inside the guest to cause a DoS and/or potentially crash the Qemu process on the host (bsc#1059777) - CVE-2017-15593: Missing cleanup in the page type system allowed a malicious or buggy PV guest to cause DoS (XSA-242 bsc#1061084) - CVE-2017-15592: A problem in the shadow pagetable code allowed a malicious or buggy HVM guest to cause DoS or cause hypervisor memory corruption potentially allowing the guest to escalate its privilege (XSA-243 bsc#1061086) - CVE-2017-15594: Problematic handling of the selector fields in the Interrupt Descriptor Table (IDT) allowed a malicious or buggy x86 PV guest to escalate its privileges or cause DoS (XSA-244 bsc#1061087) - CVE-2017-15591: Missing checks in the handling of DMOPs allowed malicious or buggy stub domain kernels or tool stacks otherwise living outside of Domain0 to cause a DoS (XSA-238 bsc#1061077) - CVE-2017-15589: Intercepted I/O write operations with less than a full machine word
    last seen2020-06-05
    modified2017-10-23
    plugin id104085
    published2017-10-23
    reporterThis script is Copyright (C) 2017-2020 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/104085
    titleopenSUSE Security Update : xen (openSUSE-2017-1181)
  • NASL familySuSE Local Security Checks
    NASL idSUSE_SU-2017-2864-1.NASL
    descriptionThis update for xen fixes several issues: These security issues were fixed : - CVE-2017-5526: The ES1370 audio device emulation support was vulnerable to a memory leakage issue allowing a privileged user inside the guest to cause a DoS and/or potentially crash the Qemu process on the host (bsc#1059777) - CVE-2017-15593: Missing cleanup in the page type system allowed a malicious or buggy PV guest to cause DoS (XSA-242 bsc#1061084) - CVE-2017-15592: A problem in the shadow pagetable code allowed a malicious or buggy HVM guest to cause DoS or cause hypervisor memory corruption potentially allowing the guest to escalate its privilege (XSA-243 bsc#1061086) - CVE-2017-15594: Problematic handling of the selector fields in the Interrupt Descriptor Table (IDT) allowed a malicious or buggy x86 PV guest to escalate its privileges or cause DoS (XSA-244 bsc#1061087) - CVE-2017-15591: Missing checks in the handling of DMOPs allowed malicious or buggy stub domain kernels or tool stacks otherwise living outside of Domain0 to cause a DoS (XSA-238 bsc#1061077) - CVE-2017-15589: Intercepted I/O write operations with less than a full machine word
    last seen2020-06-01
    modified2020-06-02
    plugin id104252
    published2017-10-30
    reporterThis script is Copyright (C) 2017-2019 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/104252
    titleSUSE SLED12 / SLES12 Security Update : xen (SUSE-SU-2017:2864-1)
  • NASL familyMisc.
    NASL idXEN_SERVER_XSA-242.NASL
    descriptionAccording to its self-reported version number, the Xen hypervisor installed on the remote host is affected by an unspecified flaw in arch/x86/mm.c that is triggered as page type references are not properly handled when performing certain cleanup operations. This allows an attacker on the guest to consume excessive memory, resulting in a denial of service for the host. Note that Nessus has checked the changeset versions based on the xen.git change log. Nessus did not check guest hardware configurations or if patches were applied manually to the source code before a recompile and reinstall.
    last seen2020-06-01
    modified2020-06-02
    plugin id103977
    published2017-10-19
    reporterThis script is Copyright (C) 2017-2019 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/103977
    titleXen Hypervisor Page Type Reference Handling Memory Exhaustion Guest-to-Host DoS (XSA-242)

References