Vulnerabilities > CVE-2017-17564 - 7PK - Errors vulnerability in XEN

047910
CVSS 6.9 - MEDIUM
Attack vector
LOCAL
Attack complexity
MEDIUM
Privileges required
NONE
Confidentiality impact
COMPLETE
Integrity impact
COMPLETE
Availability impact
COMPLETE
local
xen
CWE-388
nessus

Summary

An issue was discovered in Xen through 4.9.x allowing guest OS users to cause a denial of service (host OS crash) or gain host OS privileges by leveraging incorrect error handling for reference counting in shadow mode.

Common Weakness Enumeration (CWE)

Common Attack Pattern Enumeration and Classification (CAPEC)

  • Fuzzing for garnering J2EE/.NET-based stack traces, for application mapping
    An attacker sends random, malformed, or otherwise unexpected messages to a target application and observes any stack traces produced by error messages. Fuzzing techniques involve sending random or malformed messages to a target and monitoring the target's response. The attacker does not initially know how a target will respond to individual messages but by attempting a large number of message variants they may find a variant that trigger's desired behavior. In this attack, the purpose of the fuzzing is to cause the targeted application to return an error including a stack trace, although fuzzing a target can also sometimes cause the target to enter an unstable state, causing a crash. The stack trace enumerates the chain of methods that led up to the point where the error was encountered. This can not only reveal the names of the methods (some of which may have known weaknesses) but possibly also the location of class files and libraries as well as parameter values. In some cases, the stack trace might even disclose sensitive configuration or user information.
  • Fuzzing
    Fuzzing is a software testing method that feeds randomly constructed input to the system and looks for an indication that a failure in response to that input has occurred. Fuzzing treats the system as a black box and is totally free from any preconceptions or assumptions about the system. An attacker can leverage fuzzing to try to identify weaknesses in the system. For instance fuzzing can help an attacker discover certain assumptions made in the system about user input. Fuzzing gives an attacker a quick way of potentially uncovering some of these assumptions without really knowing anything about the internals of the system. These assumptions can then be turned against the system by specially crafting user input that may allow an attacker to achieve his goals.

Nessus

  • NASL familySuSE Local Security Checks
    NASL idSUSE_SU-2018-0609-1.NASL
    descriptionThis update for xen fixes several issues. These security issues were fixed : - CVE-2017-5753, CVE-2017-5715, CVE-2017-5754: Prevent information leaks via side effects of speculative execution, aka
    last seen2020-06-01
    modified2020-06-02
    plugin id107144
    published2018-03-06
    reporterThis script is Copyright (C) 2018-2019 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/107144
    titleSUSE SLES12 Security Update : xen (SUSE-SU-2018:0609-1) (Meltdown) (Spectre)
    code
    #
    # (C) Tenable Network Security, Inc.
    #
    # The descriptive text and package checks in this plugin were
    # extracted from SUSE update advisory SUSE-SU-2018:0609-1.
    # The text itself is copyright (C) SUSE.
    #
    
    include("compat.inc");
    
    if (description)
    {
      script_id(107144);
      script_version("3.7");
      script_cvs_date("Date: 2019/09/10 13:51:47");
    
      script_cve_id("CVE-2017-15595", "CVE-2017-17563", "CVE-2017-17564", "CVE-2017-17565", "CVE-2017-17566", "CVE-2017-18030", "CVE-2017-5715", "CVE-2017-5753", "CVE-2017-5754", "CVE-2018-5683");
      script_xref(name:"IAVA", value:"2018-A-0019");
      script_xref(name:"IAVA", value:"2018-A-0020");
    
      script_name(english:"SUSE SLES12 Security Update : xen (SUSE-SU-2018:0609-1) (Meltdown) (Spectre)");
      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-2017-5753, CVE-2017-5715, CVE-2017-5754: Prevent
        information leaks via side effects of speculative
        execution, aka 'Spectre' and 'Meltdown' attacks
        (bsc#1074562, bsc#1068032)
    
      - CVE-2018-5683: The vga_draw_text function allowed local
        OS guest privileged users to cause a denial of service
        (out-of-bounds read and QEMU process crash) by
        leveraging improper memory address validation
        (bsc#1076116).
    
      - CVE-2017-18030: The cirrus_invalidate_region function
        allowed local OS guest privileged users to cause a
        denial of service (out-of-bounds array access and QEMU
        process crash) via vectors related to negative pitch
        (bsc#1076180).
    
      - CVE-2017-15595: x86 PV guest OS users were able to cause
        a DoS (unbounded recursion, stack consumption, and
        hypervisor crash) or possibly gain privileges via
        crafted page-table stacking (bsc#1061081)
    
      - CVE-2017-17566: Prevent PV guest OS users to cause a
        denial of service (host OS crash) or gain host OS
        privileges in shadow mode by mapping a certain auxiliary
        page (bsc#1070158).
    
      - CVE-2017-17563: Prevent guest OS users to cause a denial
        of service (host OS crash) or gain host OS privileges by
        leveraging an incorrect mask for reference-count
        overflow checking in shadow mode (bsc#1070159).
    
      - CVE-2017-17564: Prevent guest OS users to cause a denial
        of service (host OS crash) or gain host OS privileges by
        leveraging incorrect error handling for reference
        counting in shadow mode (bsc#1070160).
    
      - CVE-2017-17565: Prevent PV guest OS users to cause a
        denial of service (host OS crash) if shadow mode and
        log-dirty mode are in place, because of an incorrect
        assertion related to M2P (bsc#1070163).
    
      - Added missing intermediate preemption checks for guest
        requesting removal of memory. This allowed malicious
        guest administrator to cause denial of service due to
        the high cost of this operation (bsc#1080635).
    
      - Because of XEN not returning the proper error messages
        when transitioning grant tables from v2 to v1 a
        malicious guest was able to cause DoS or potentially
        allowed for privilege escalation as well as information
        leaks (bsc#1080662).
    
    The update package also includes non-security fixes. See advisory for
    details.
    
    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=1035442"
      );
      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=1068032"
      );
      script_set_attribute(
        attribute:"see_also",
        value:"https://bugzilla.suse.com/show_bug.cgi?id=1070158"
      );
      script_set_attribute(
        attribute:"see_also",
        value:"https://bugzilla.suse.com/show_bug.cgi?id=1070159"
      );
      script_set_attribute(
        attribute:"see_also",
        value:"https://bugzilla.suse.com/show_bug.cgi?id=1070160"
      );
      script_set_attribute(
        attribute:"see_also",
        value:"https://bugzilla.suse.com/show_bug.cgi?id=1070163"
      );
      script_set_attribute(
        attribute:"see_also",
        value:"https://bugzilla.suse.com/show_bug.cgi?id=1074562"
      );
      script_set_attribute(
        attribute:"see_also",
        value:"https://bugzilla.suse.com/show_bug.cgi?id=1076116"
      );
      script_set_attribute(
        attribute:"see_also",
        value:"https://bugzilla.suse.com/show_bug.cgi?id=1076180"
      );
      script_set_attribute(
        attribute:"see_also",
        value:"https://bugzilla.suse.com/show_bug.cgi?id=1080635"
      );
      script_set_attribute(
        attribute:"see_also",
        value:"https://bugzilla.suse.com/show_bug.cgi?id=1080662"
      );
      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-2017-17563/"
      );
      script_set_attribute(
        attribute:"see_also",
        value:"https://www.suse.com/security/cve/CVE-2017-17564/"
      );
      script_set_attribute(
        attribute:"see_also",
        value:"https://www.suse.com/security/cve/CVE-2017-17565/"
      );
      script_set_attribute(
        attribute:"see_also",
        value:"https://www.suse.com/security/cve/CVE-2017-17566/"
      );
      script_set_attribute(
        attribute:"see_also",
        value:"https://www.suse.com/security/cve/CVE-2017-18030/"
      );
      script_set_attribute(
        attribute:"see_also",
        value:"https://www.suse.com/security/cve/CVE-2017-5715/"
      );
      script_set_attribute(
        attribute:"see_also",
        value:"https://www.suse.com/security/cve/CVE-2017-5753/"
      );
      script_set_attribute(
        attribute:"see_also",
        value:"https://www.suse.com/security/cve/CVE-2017-5754/"
      );
      script_set_attribute(
        attribute:"see_also",
        value:"https://www.suse.com/security/cve/CVE-2018-5683/"
      );
      # https://www.suse.com/support/update/announcement/2018/suse-su-20180609-1/
      script_set_attribute(
        attribute:"see_also",
        value:"http://www.nessus.org/u?4b57cd44"
      );
      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-6-2018-415=1
    
    SUSE Linux Enterprise Server for SAP 12-SP1:zypper in -t patch
    SUSE-SLE-SAP-12-SP1-2018-415=1
    
    SUSE Linux Enterprise Server 12-SP1-LTSS:zypper in -t patch
    SUSE-SLE-SERVER-12-SP1-2018-415=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:H/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:H/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:"exploited_by_malware", value:"true");
      script_set_attribute(attribute:"exploit_framework_canvas", value:"true");
      script_set_attribute(attribute:"canvas_package", value:'CANVAS');
    
      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:"2017/10/18");
      script_set_attribute(attribute:"patch_publication_date", value:"2018/03/05");
      script_set_attribute(attribute:"plugin_publication_date", value:"2018/03/06");
      script_set_attribute(attribute:"in_the_news", value:"true");
      script_set_attribute(attribute:"generated_plugin", value:"current");
      script_set_attribute(attribute:"stig_severity", value:"I");
      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:"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_24-22.43.1")) flag++;
    if (rpm_check(release:"SLES12", sp:"1", cpu:"x86_64", reference:"xen-debugsource-4.5.5_24-22.43.1")) flag++;
    if (rpm_check(release:"SLES12", sp:"1", cpu:"x86_64", reference:"xen-doc-html-4.5.5_24-22.43.1")) flag++;
    if (rpm_check(release:"SLES12", sp:"1", cpu:"x86_64", reference:"xen-kmp-default-4.5.5_24_k3.12.74_60.64.82-22.43.1")) flag++;
    if (rpm_check(release:"SLES12", sp:"1", cpu:"x86_64", reference:"xen-kmp-default-debuginfo-4.5.5_24_k3.12.74_60.64.82-22.43.1")) flag++;
    if (rpm_check(release:"SLES12", sp:"1", cpu:"x86_64", reference:"xen-libs-32bit-4.5.5_24-22.43.1")) flag++;
    if (rpm_check(release:"SLES12", sp:"1", cpu:"x86_64", reference:"xen-libs-4.5.5_24-22.43.1")) flag++;
    if (rpm_check(release:"SLES12", sp:"1", cpu:"x86_64", reference:"xen-libs-debuginfo-32bit-4.5.5_24-22.43.1")) flag++;
    if (rpm_check(release:"SLES12", sp:"1", cpu:"x86_64", reference:"xen-libs-debuginfo-4.5.5_24-22.43.1")) flag++;
    if (rpm_check(release:"SLES12", sp:"1", cpu:"x86_64", reference:"xen-tools-4.5.5_24-22.43.1")) flag++;
    if (rpm_check(release:"SLES12", sp:"1", cpu:"x86_64", reference:"xen-tools-debuginfo-4.5.5_24-22.43.1")) flag++;
    if (rpm_check(release:"SLES12", sp:"1", cpu:"x86_64", reference:"xen-tools-domU-4.5.5_24-22.43.1")) flag++;
    if (rpm_check(release:"SLES12", sp:"1", cpu:"x86_64", reference:"xen-tools-domU-debuginfo-4.5.5_24-22.43.1")) 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 familyOracleVM Local Security Checks
    NASL idORACLEVM_OVMSA-2018-0224.NASL
    descriptionThe remote OracleVM system is missing necessary patches to address critical security updates : please see Oracle VM Security Advisory OVMSA-2018-0224 for details.
    last seen2020-06-01
    modified2020-06-02
    plugin id110110
    published2018-05-25
    reporterThis script is Copyright (C) 2018-2019 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/110110
    titleOracleVM 3.3 : xen (OVMSA-2018-0224) (Meltdown) (Spectre)
    code
    #
    # (C) Tenable Network Security, Inc.
    #
    # The package checks in this plugin were extracted from OracleVM
    # Security Advisory OVMSA-2018-0224.
    #
    
    include("compat.inc");
    
    if (description)
    {
      script_id(110110);
      script_version("1.4");
      script_cvs_date("Date: 2019/09/27 13:00:35");
    
      script_cve_id("CVE-2017-17563", "CVE-2017-17564", "CVE-2017-17565", "CVE-2017-17566", "CVE-2017-5715", "CVE-2017-5753", "CVE-2017-5754");
      script_xref(name:"IAVA", value:"2018-A-0019");
      script_xref(name:"IAVA", value:"2018-A-0020");
    
      script_name(english:"OracleVM 3.3 : xen (OVMSA-2018-0224) (Meltdown) (Spectre)");
      script_summary(english:"Checks the RPM output for the updated packages.");
    
      script_set_attribute(
        attribute:"synopsis", 
        value:"The remote OracleVM host is missing one or more security updates."
      );
      script_set_attribute(
        attribute:"description", 
        value:
    "The remote OracleVM system is missing necessary patches to address
    critical security updates : please see Oracle VM Security Advisory
    OVMSA-2018-0224 for details."
      );
      script_set_attribute(
        attribute:"see_also",
        value:"https://oss.oracle.com/pipermail/oraclevm-errata/2018-May/000859.html"
      );
      script_set_attribute(
        attribute:"solution", 
        value:"Update the affected xen / xen-tools packages."
      );
      script_set_cvss_base_vector("CVSS2#AV:L/AC:M/Au:N/C:C/I:C/A:C");
      script_set_cvss_temporal_vector("CVSS2#E:H/RL:OF/RC:C");
      script_set_cvss3_base_vector("CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H");
      script_set_cvss3_temporal_vector("CVSS:3.0/E:H/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:"exploited_by_malware", value:"true");
      script_set_attribute(attribute:"exploit_framework_canvas", value:"true");
      script_set_attribute(attribute:"canvas_package", value:'CANVAS');
    
      script_set_attribute(attribute:"plugin_type", value:"local");
      script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:vm:xen");
      script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:vm:xen-tools");
      script_set_attribute(attribute:"cpe", value:"cpe:/o:oracle:vm_server:3.3");
    
      script_set_attribute(attribute:"vuln_publication_date", value:"2017/12/12");
      script_set_attribute(attribute:"patch_publication_date", value:"2018/05/24");
      script_set_attribute(attribute:"plugin_publication_date", value:"2018/05/25");
      script_set_attribute(attribute:"in_the_news", value:"true");
      script_set_attribute(attribute:"generated_plugin", value:"current");
      script_set_attribute(attribute:"stig_severity", value:"I");
      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:"OracleVM Local Security Checks");
    
      script_dependencies("ssh_get_info.nasl");
      script_require_keys("Host/local_checks_enabled", "Host/OracleVM/release", "Host/OracleVM/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/OracleVM/release");
    if (isnull(release) || "OVS" >!< release) audit(AUDIT_OS_NOT, "OracleVM");
    if (! preg(pattern:"^OVS" + "3\.3" + "(\.[0-9]|$)", string:release)) audit(AUDIT_OS_NOT, "OracleVM 3.3", "OracleVM " + release);
    if (!get_kb_item("Host/OracleVM/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, "OracleVM", cpu);
    if ("x86_64" >!< cpu) audit(AUDIT_ARCH_NOT, "x86_64", cpu);
    
    flag = 0;
    if (rpm_check(release:"OVS3.3", reference:"xen-4.3.0-55.el6.186.143")) flag++;
    if (rpm_check(release:"OVS3.3", reference:"xen-tools-4.3.0-55.el6.186.143")) flag++;
    
    if (flag)
    {
      if (report_verbosity > 0) security_warning(port:0, extra:rpm_report_get());
      else security_warning(0);
      exit(0);
    }
    else
    {
      tested = pkg_tests_get();
      if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
      else audit(AUDIT_PACKAGE_NOT_INSTALLED, "xen / xen-tools");
    }
    
  • NASL familyDebian Local Security Checks
    NASL idDEBIAN_DLA-1230.NASL
    descriptionMultiple vulnerabilities have been discovered in the Xen hypervisor, which could result in denial of service, information leaks, privilege escalation or the execution of arbitrary code. For Debian 7
    last seen2020-03-17
    modified2018-01-08
    plugin id105621
    published2018-01-08
    reporterThis script is Copyright (C) 2018-2020 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/105621
    titleDebian DLA-1230-1 : xen security update
    code
    #%NASL_MIN_LEVEL 80502
    #
    # (C) Tenable Network Security, Inc.
    #
    # The descriptive text and package checks in this plugin were
    # extracted from Debian Security Advisory DLA-1230-1. The text
    # itself is copyright (C) Software in the Public Interest, Inc.
    #
    
    include("compat.inc");
    
    if (description)
    {
      script_id(105621);
      script_version("3.5");
      script_set_attribute(attribute:"plugin_modification_date", value:"2020/03/12");
    
      script_cve_id("CVE-2017-17044", "CVE-2017-17045", "CVE-2017-17563", "CVE-2017-17564", "CVE-2017-17565", "CVE-2017-17566");
    
      script_name(english:"Debian DLA-1230-1 : xen security update");
      script_summary(english:"Checks dpkg output for the updated packages.");
    
      script_set_attribute(
        attribute:"synopsis", 
        value:"The remote Debian host is missing a security update."
      );
      script_set_attribute(
        attribute:"description", 
        value:
    "Multiple vulnerabilities have been discovered in the Xen hypervisor,
    which could result in denial of service, information leaks, privilege
    escalation or the execution of arbitrary code.
    
    For Debian 7 'Wheezy', these problems have been fixed in version
    4.1.6.lts1-11.
    
    We recommend that you upgrade your xen packages.
    
    NOTE: Tenable Network Security has extracted the preceding description
    block directly from the DLA 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://lists.debian.org/debian-lts-announce/2018/01/msg00003.html"
      );
      script_set_attribute(
        attribute:"see_also",
        value:"https://packages.debian.org/source/wheezy/xen"
      );
      script_set_attribute(attribute:"solution", value:"Upgrade the affected 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:U/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:U/RL:O/RC:C");
      script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
      script_set_attribute(attribute:"exploit_available", value:"false");
    
      script_set_attribute(attribute:"plugin_type", value:"local");
      script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libxen-4.1");
      script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libxen-dev");
      script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libxen-ocaml");
      script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libxen-ocaml-dev");
      script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libxenstore3.0");
      script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:xen-docs-4.1");
      script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:xen-hypervisor-4.1-amd64");
      script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:xen-hypervisor-4.1-i386");
      script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:xen-system-amd64");
      script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:xen-system-i386");
      script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:xen-utils-4.1");
      script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:xen-utils-common");
      script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:xenstore-utils");
      script_set_attribute(attribute:"cpe", value:"cpe:/o:debian:debian_linux:7.0");
    
      script_set_attribute(attribute:"patch_publication_date", value:"2018/01/05");
      script_set_attribute(attribute:"plugin_publication_date", value:"2018/01/08");
      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:"Debian Local Security Checks");
    
      script_dependencies("ssh_get_info.nasl");
      script_require_keys("Host/local_checks_enabled", "Host/Debian/release", "Host/Debian/dpkg-l");
    
      exit(0);
    }
    
    
    include("audit.inc");
    include("debian_package.inc");
    
    
    if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
    if (!get_kb_item("Host/Debian/release")) audit(AUDIT_OS_NOT, "Debian");
    if (!get_kb_item("Host/Debian/dpkg-l")) audit(AUDIT_PACKAGE_LIST_MISSING);
    
    
    flag = 0;
    if (deb_check(release:"7.0", prefix:"libxen-4.1", reference:"4.1.6.lts1-11")) flag++;
    if (deb_check(release:"7.0", prefix:"libxen-dev", reference:"4.1.6.lts1-11")) flag++;
    if (deb_check(release:"7.0", prefix:"libxen-ocaml", reference:"4.1.6.lts1-11")) flag++;
    if (deb_check(release:"7.0", prefix:"libxen-ocaml-dev", reference:"4.1.6.lts1-11")) flag++;
    if (deb_check(release:"7.0", prefix:"libxenstore3.0", reference:"4.1.6.lts1-11")) flag++;
    if (deb_check(release:"7.0", prefix:"xen-docs-4.1", reference:"4.1.6.lts1-11")) flag++;
    if (deb_check(release:"7.0", prefix:"xen-hypervisor-4.1-amd64", reference:"4.1.6.lts1-11")) flag++;
    if (deb_check(release:"7.0", prefix:"xen-hypervisor-4.1-i386", reference:"4.1.6.lts1-11")) flag++;
    if (deb_check(release:"7.0", prefix:"xen-system-amd64", reference:"4.1.6.lts1-11")) flag++;
    if (deb_check(release:"7.0", prefix:"xen-system-i386", reference:"4.1.6.lts1-11")) flag++;
    if (deb_check(release:"7.0", prefix:"xen-utils-4.1", reference:"4.1.6.lts1-11")) flag++;
    if (deb_check(release:"7.0", prefix:"xen-utils-common", reference:"4.1.6.lts1-11")) flag++;
    if (deb_check(release:"7.0", prefix:"xenstore-utils", reference:"4.1.6.lts1-11")) flag++;
    
    if (flag)
    {
      if (report_verbosity > 0) security_hole(port:0, extra:deb_report_get());
      else security_hole(0);
      exit(0);
    }
    else audit(AUDIT_HOST_NOT, "affected");
    
  • NASL familyMisc.
    NASL idCITRIX_XENSERVER_CTX231390.NASL
    descriptionThe version of Citrix XenServer running on the remote host is missing a security hotfix. It is, therefore, affected by multiple vulnerabilities.
    last seen2020-06-01
    modified2020-06-02
    plugin id105617
    published2018-01-05
    reporterThis script is Copyright (C) 2018-2019 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/105617
    titleCitrix XenServer Multiple Vulnerabilities (CTX231390) (Meltdown)(Spectre)
    code
    #
    # (C) Tenable Network Security, Inc.
    #
    
    include("compat.inc");
    
    if (description)
    {
      script_id(105617);
      script_version("1.9");
      script_cvs_date("Date: 2019/11/08");
    
      script_cve_id(
        "CVE-2017-5715",
        "CVE-2017-5753",
        "CVE-2017-5754",
        "CVE-2017-17563",
        "CVE-2017-17564",
        "CVE-2017-17565",
        "CVE-2017-17566"
      );
      script_bugtraq_id(
        102169,
        102172,
        102371,
        102376,
        102378
      );
      script_xref(name:"IAVA", value:"2018-A-0019");
      script_xref(name:"IAVA", value:"2018-A-0020");
    
      script_name(english:"Citrix XenServer Multiple Vulnerabilities (CTX231390) (Meltdown)(Spectre)");
      script_summary(english:"Checks for patches.");
    
      script_set_attribute(attribute:"synopsis", value:
    "A server virtualization platform installed on the remote host is
    affected by multiple vulnerabilities.");
      script_set_attribute(attribute:"description", value:
    "The version of Citrix XenServer running on the remote host is missing
    a security hotfix. It is, therefore, affected by multiple
    vulnerabilities.");
      script_set_attribute(attribute:"see_also", value:"https://support.citrix.com/article/CTX231390");
      script_set_attribute(attribute:"see_also", value:"https://support.citrix.com/article/CTX231399");
      script_set_attribute(attribute:"solution", value:
    "Apply the appropriate hotfix according to the vendor advisory.");
      script_set_cvss_base_vector("CVSS2#AV:L/AC:M/Au:N/C:C/I:C/A:C");
      script_set_cvss_temporal_vector("CVSS2#E:H/RL:OF/RC:C");
      script_set_cvss3_base_vector("CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H");
      script_set_cvss3_temporal_vector("CVSS:3.0/E:H/RL:O/RC:C");
      script_set_attribute(attribute:"cvss_score_source", value:"CVE-2017-17566");
    
      script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available");
      script_set_attribute(attribute:"exploit_available", value:"true");
      script_set_attribute(attribute:"exploited_by_malware", value:"true");
      script_set_attribute(attribute:"exploit_framework_canvas", value:"true");
      script_set_attribute(attribute:"canvas_package", value:'CANVAS');
    
      script_set_attribute(attribute:"vuln_publication_date", value:"2018/01/04");
      script_set_attribute(attribute:"patch_publication_date", value:"2018/01/04");
      script_set_attribute(attribute:"plugin_publication_date", value:"2018/01/05");
    
      script_set_attribute(attribute:"plugin_type", value:"local");
      script_set_attribute(attribute:"cpe", value:"cpe:/a:citrix:xenserver");
      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) 2018-2019 and is owned by Tenable, Inc. or an Affiliate thereof.");
    
      script_dependencies("citrix_xenserver_version.nbin");
      script_require_keys("Host/XenServer/version", "Host/local_checks_enabled", "Settings/ParanoidReport");
    
      exit(0);
    }
    
    include("audit.inc");
    include("global_settings.inc");
    include("misc_func.inc");
    
    if (report_paranoia < 2) audit(AUDIT_PARANOID);
    
    app_name = "Citrix XenServer";
    version = get_kb_item_or_exit("Host/XenServer/version");
    get_kb_item_or_exit("Host/local_checks_enabled");
    patches = get_kb_item("Host/XenServer/patches");
    vuln = FALSE;
    fix = '';
    pending = "Refer to vendor for patch/mitigation options";
    
    if (version == "6.0.2")
    {
      fix = pending;
      if (fix >!< patches) vuln = TRUE;
    }
    else if (version =~ "^6\.2")
    {
      fix = pending;
      if (fix >!< patches) vuln = TRUE;
    }
    else if (version =~ "^6\.5($|[^0-9])")
    {
      fix = pending;
      if (fix >!< patches) vuln = TRUE;
    }
    else if (version =~ "^7\.0($|[^0-9])")
    {
      fix = pending;
      if (fix >!< patches) vuln = TRUE;
    }
    else if (version =~ "^7\.1($|[^0-9])")
    {
      fix = "XS71ECU1009"; # CTX230788
      if (fix >!< patches) vuln = TRUE;
    }
    else if (version =~ "^7\.2($|[^0-9])")
    {
      fix = "XS72E013"; # CTX230789
      if (fix >!< patches) vuln = TRUE;
    }
    else if (version =~ "^7\.3($|[^0-9])")
    {
      fix = "XS73E001"; # CTX230790
      if (fix >!< patches) vuln = TRUE;
    }
    
    
    else audit(AUDIT_INST_VER_NOT_VULN, app_name, version);
    
    if (vuln)
    {
      port = 0;
      report = report_items_str(
        report_items:make_array(
          "Installed version", version,
          "Missing hotfix", fix
        ),
        ordered_fields:make_list("Installed version", "Missing hotfix")
      );
      security_report_v4(port:port, severity:SECURITY_WARNING, extra:report);
    }
    else audit(AUDIT_PATCH_INSTALLED, fix);
    
  • NASL familyFedora Local Security Checks
    NASL idFEDORA_2017-5945560816.NASL
    descriptionanother patch related to the [XSA-240, CVE-2017-15595] issue x86 PV guests may gain access to internally used page [XSA-248] broken x86 shadow mode refcount overflow check [XSA-249] improper x86 shadow mode refcount error handling [XSA-250] improper bug check in x86 log-dirty handling [XSA-251] 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 id105882
    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/105882
    titleFedora 27 : xen (2017-5945560816)
  • 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
  • NASL familySuSE Local Security Checks
    NASL idSUSE_SU-2018-0678-1.NASL
    descriptionThis update for xen fixes several issues. These security issues were fixed : - CVE-2017-5753, CVE-2017-5715, CVE-2017-5754: Prevent information leaks via side effects of speculative execution, aka
    last seen2020-06-01
    modified2020-06-02
    plugin id108369
    published2018-03-15
    reporterThis script is Copyright (C) 2018-2019 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/108369
    titleSUSE SLES11 Security Update : xen (SUSE-SU-2018:0678-1) (Meltdown) (Spectre)
  • NASL familySuSE Local Security Checks
    NASL idSUSE_SU-2018-0638-1.NASL
    descriptionThis update for xen fixes several issues. This new feature was included : - add script and sysv service to watch for vcpu online/offline events in a HVM domU These security issues were fixed : - CVE-2017-5753, CVE-2017-5715, CVE-2017-5754: Prevent information leaks via side effects of speculative execution, aka
    last seen2020-06-01
    modified2020-06-02
    plugin id107254
    published2018-03-09
    reporterThis script is Copyright (C) 2018-2019 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/107254
    titleSUSE SLES11 Security Update : xen (SUSE-SU-2018:0638-1) (Meltdown) (Spectre)
  • NASL familyOracleVM Local Security Checks
    NASL idORACLEVM_OVMSA-2018-0039.NASL
    descriptionThe remote OracleVM system is missing necessary patches to address critical security updates : - BUILDINFO: OVMF commit=173bf5c847e3ca8b42c11796ce048d8e2e916ff8 - BUILDINFO: xen commit=b68fb6eb2d74ac16bb1e733c5fe5c9d9622b0838 - BUILDINFO: QEMU upstream commit=8bff6989bd0bafcc0ddf859c23ce6a2ff21a80ff - BUILDINFO: QEMU traditional commit=346fdd7edd73f8287d0d0a2bab9c67b71bc6b8ba - BUILDINFO: IPXE commit=9a93db3f0947484e30e753bbd61a10b17336e20e - BUILDINFO: SeaBIOS commit=7d9cbe613694924921ed1a6f8947d711c5832eee - vnuma: don
    last seen2020-06-01
    modified2020-06-02
    plugin id109545
    published2018-05-03
    reporterThis script is Copyright (C) 2018-2019 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/109545
    titleOracleVM 3.4 : xen (OVMSA-2018-0039)
  • NASL familyOracleVM Local Security Checks
    NASL idORACLEVM_OVMSA-2018-0225.NASL
    descriptionThe remote OracleVM system is missing necessary patches to address critical security updates : - From: Jan Beulich Subject: x86/paging: don
    last seen2020-06-01
    modified2020-06-02
    plugin id110305
    published2018-06-04
    reporterThis script is Copyright (C) 2018-2019 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/110305
    titleOracleVM 3.2 : xen (OVMSA-2018-0225)
  • NASL familySuSE Local Security Checks
    NASL idOPENSUSE-2018-169.NASL
    descriptionThis update for xen fixes several issues. These security issues were fixed : - CVE-2017-5753, CVE-2017-5715, CVE-2017-5754: Prevent information leaks via side effects of speculative execution, aka
    last seen2020-06-05
    modified2018-02-16
    plugin id106864
    published2018-02-16
    reporterThis script is Copyright (C) 2018-2020 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/106864
    titleopenSUSE Security Update : xen (openSUSE-2018-169) (Meltdown) (Spectre)
  • NASL familyMisc.
    NASL idCITRIX_XENSERVER_CTX232096.NASL
    descriptionThe version of Citrix XenServer running on the remote host is missing a security hotfix. It is, therefore, affected by multiple vulnerabilities.
    last seen2020-06-01
    modified2020-06-02
    plugin id108886
    published2018-04-06
    reporterThis script is Copyright (C) 2018-2019 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/108886
    titleCitrix XenServer Multiple Vulnerabilities (CTX232096)
  • NASL familyOracleVM Local Security Checks
    NASL idORACLEVM_OVMSA-2018-0248.NASL
    descriptionThe remote OracleVM system is missing necessary patches to address critical security updates : please see Oracle VM Security Advisory OVMSA-2018-0248 for details.
    last seen2020-06-01
    modified2020-06-02
    plugin id111992
    published2018-08-20
    reporterThis script is Copyright (C) 2018-2019 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/111992
    titleOracleVM 3.4 : xen (OVMSA-2018-0248) (Bunker Buster) (Foreshadow) (Meltdown) (POODLE) (Spectre)
  • NASL familyMisc.
    NASL idXEN_SERVER_XSA-250.NASL
    descriptionAccording to its self-reported version number, the Xen hypervisor installed on the remote host is affected by a guest-to-host denial of service vulnerability. Note that x86 systems are vulnerable. ARM systems are not vulnerable. 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 id105492
    published2017-12-29
    reporterThis script is Copyright (C) 2017-2019 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/105492
    titleXen Shadow Mode Page Use Reference Counting Error Handling Guest-to-Host DoS (XSA-250)
  • NASL familySuSE Local Security Checks
    NASL idSUSE_SU-2018-0601-1.NASL
    descriptionThis update for xen fixes several issues. These security issues were fixed : - CVE-2017-5753, CVE-2017-5715, CVE-2017-5754: Prevent information leaks via side effects of speculative execution, aka
    last seen2020-06-01
    modified2020-06-02
    plugin id107140
    published2018-03-06
    reporterThis script is Copyright (C) 2018-2019 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/107140
    titleSUSE SLES12 Security Update : xen (SUSE-SU-2018:0601-1) (Meltdown) (Spectre)
  • NASL familySuSE Local Security Checks
    NASL idSUSE_SU-2018-0438-1.NASL
    descriptionThis update for xen fixes several issues. These security issues were fixed : - CVE-2017-5753, CVE-2017-5715, CVE-2017-5754: Prevent information leaks via side effects of speculative execution, aka
    last seen2020-06-01
    modified2020-06-02
    plugin id106834
    published2018-02-15
    reporterThis script is Copyright (C) 2018-2019 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/106834
    titleSUSE SLED12 / SLES12 Security Update : xen (SUSE-SU-2018:0438-1) (Meltdown) (Spectre)
  • NASL familyFedora Local Security Checks
    NASL idFEDORA_2017-16A414B3C5.NASL
    descriptionanother patch related to the [XSA-240, CVE-2017-15595] issue xen: various flaws (#1525018) x86 PV guests may gain access to internally used page [XSA-248] broken x86 shadow mode refcount overflow check [XSA-249] improper x86 shadow mode refcount error handling [XSA-250] improper bug check in x86 log-dirty handling [XSA-251] ---- xen: various flaws (#1518214) x86: infinite loop due to missing PoD error checking [XSA-246] Missing p2m error checking in PoD code [XSA-247] 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
    modified2018-01-03
    plugin id105511
    published2018-01-03
    reporterThis script is Copyright (C) 2018-2020 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/105511
    titleFedora 26 : xen (2017-16a414b3c5)
  • NASL familyDebian Local Security Checks
    NASL idDEBIAN_DLA-1549.NASL
    descriptionMultiple vulnerabilities have been discovered in the Xen hypervisor, which could result in denial of service, informations leaks or privilege escalation. For Debian 8
    last seen2020-06-01
    modified2020-06-02
    plugin id118215
    published2018-10-19
    reporterThis script is Copyright (C) 2018 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/118215
    titleDebian DLA-1549-1 : xen security update
  • NASL familySuSE Local Security Checks
    NASL idSUSE_SU-2018-0472-1.NASL
    descriptionThis update for xen fixes several issues. These security issues were fixed : - CVE-2017-5753, CVE-2017-5715, CVE-2017-5754: Prevent information leaks via side effects of speculative execution, aka
    last seen2020-06-01
    modified2020-06-02
    plugin id106901
    published2018-02-20
    reporterThis script is Copyright (C) 2018-2019 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/106901
    titleSUSE SLED12 / SLES12 Security Update : xen (SUSE-SU-2018:0472-1) (Meltdown) (Spectre)
  • NASL familyDebian Local Security Checks
    NASL idDEBIAN_DSA-4112.NASL
    descriptionMultiple vulnerabilities have been discovered in the Xen hypervisor : - CVE-2017-17563 Jan Beulich discovered that an incorrect reference count overflow check in x86 shadow mode may result in denial of service or privilege escalation. - CVE-2017-17564 Jan Beulich discovered that improper x86 shadow mode reference count error handling may result in denial of service or privilege escalation. - CVE-2017-17565 Jan Beulich discovered that an incomplete bug check in x86 log-dirty handling may result in denial of service. - CVE-2017-17566 Jan Beulich discovered that x86 PV guests may gain access to internally used pages which could result in denial of service or potential privilege escalation. In addition this update ships the
    last seen2020-06-01
    modified2020-06-02
    plugin id106820
    published2018-02-15
    reporterThis script is Copyright (C) 2018 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/106820
    titleDebian DSA-4112-1 : xen - security update