Vulnerabilities > CVE-2014-1896 - Improper Input Validation vulnerability in XEN

047910
CVSS 4.9 - MEDIUM
Attack vector
ADJACENT_NETWORK
Attack complexity
MEDIUM
Privileges required
SINGLE
Confidentiality impact
PARTIAL
Integrity impact
PARTIAL
Availability impact
PARTIAL
xen
CWE-20
nessus
NVD
Published: 2014-04-01
Updated: 2017-01-07

Summary

The (1) do_send and (2) do_recv functions in io.c in libvchan in Xen 4.2.x, 4.3.x, and 4.4-RC series allows local guests to cause a denial of service or possibly gain privileges via crafted xenstore ring indexes, which triggers a "read or write past the end of the ring."

Vulnerable Configurations

Part Description Count
OS
Xen
7

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 familyFedora Local Security Checks
    NASL idFEDORA_2014-2188.NASL
    descriptionthree security fixes: integer overflow in several XSM/Flask hypercalls [XSA-84] Off-by-one error in FLASK_AVC_CACHESTAT hypercall [XSA-85] libvchan failure handling malicious ring indexes [XSA-86] Note that Tenable Network Security has extracted the preceding description block directly from the Fedora security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.
    last seen2020-03-17
    modified2014-02-17
    plugin id72540
    published2014-02-17
    reporterThis script is Copyright (C) 2014-2020 Tenable Network Security, Inc.
    sourcehttps://www.tenable.com/plugins/nessus/72540
    titleFedora 19 : xen-4.2.3-15.fc19 (2014-2188)
    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 2014-2188.
#

include("compat.inc");

if (description)
{
  script_id(72540);
  script_version("1.5");
  script_set_attribute(attribute:"plugin_modification_date", value:"2020/03/12");

  script_cve_id("CVE-2014-1891", "CVE-2014-1892", "CVE-2014-1893", "CVE-2014-1894", "CVE-2014-1895", "CVE-2014-1896");
  script_bugtraq_id(65414, 65419, 65424);
  script_xref(name:"FEDORA", value:"2014-2188");

  script_name(english:"Fedora 19 : xen-4.2.3-15.fc19 (2014-2188)");
  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:
"three security fixes: integer overflow in several XSM/Flask hypercalls
[XSA-84] Off-by-one error in FLASK_AVC_CACHESTAT hypercall [XSA-85]
libvchan failure handling malicious ring indexes [XSA-86]

Note that Tenable Network Security has extracted the preceding
description block directly from the Fedora 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.redhat.com/show_bug.cgi?id=1062326"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.redhat.com/show_bug.cgi?id=1062329"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.redhat.com/show_bug.cgi?id=1062331"
  );
  # https://lists.fedoraproject.org/pipermail/package-announce/2014-February/128429.html
  script_set_attribute(
    attribute:"see_also",
    value:"http://www.nessus.org/u?62988bdd"
  );
  script_set_attribute(attribute:"solution", value:"Update the affected xen package.");
  script_set_cvss_base_vector("CVSS2#AV:A/AC:M/Au:S/C:P/I:N/A:C");
  script_set_cvss_temporal_vector("CVSS2#E:ND/RL:OF/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:fedoraproject:fedora:xen");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:fedoraproject:fedora:19");

  script_set_attribute(attribute:"patch_publication_date", value:"2014/02/08");
  script_set_attribute(attribute:"plugin_publication_date", value:"2014/02/17");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"This script is Copyright (C) 2014-2020 Tenable Network Security, Inc.");
  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 = eregmatch(pattern: "Fedora.*release ([0-9]+)", string:release);
if (isnull(os_ver)) audit(AUDIT_UNKNOWN_APP_VER, "Fedora");
os_ver = os_ver[1];
if (! ereg(pattern:"^19([^0-9]|$)", string:os_ver)) audit(AUDIT_OS_NOT, "Fedora 19.x", "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:"FC19", reference:"xen-4.2.3-15.fc19")) 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");
}
  • NASL familySuSE Local Security Checks
    NASL idOPENSUSE-2014-271.NASL
    descriptionXen was updated to fix various bugs and security issues : Update to Xen version 4.2.4 c/s 26280. - bnc#861256 - CVE-2014-1950: xen: XSA-88: use-after-free in xc_cpupool_getinfo() under memory pressure. (fix included with update) - bnc#863297: xend/pvscsi: recognize also SCSI CDROM devices - bnc#858496 - CVE-2014-1642: Xen: XSA-83: Out-of-memory condition yielding memory corruption during IRQ setup - bnc#860163 - xen: XSA-84: integer overflow in several XSM/Flask hypercalls (CVE-2014-1891 CVE-2014-1892 CVE-2014-1893 CVE-2014-1894) - bnc#860165 - CVE-2014-1895: xen: XSA-85: Off-by-one error in FLASK_AVC_CACHESTAT hypercall - bnc#860300 - CVE-2014-1896: xen: XSA-86: libvchan failure handling malicious ring indexes - bnc#860302 - CVE-2014-1666: xen: XSA-87: PHYSDEVOP_(prepare,release)_msix exposed to unprivileged guests - bnc#858311 - Server is not booting in kernel XEN after latest updates - (XEN) setup 0000:00:18.0 for d0 failed (-19) - bnc#858496 - CVE-2014-1642: Xen: XSA-83: Out-of-memory condition yielding memory corruption during IRQ setup - bnc#853049 - CVE-2013-6885: xen: XSA-82: Guest triggerable AMD CPU erratum may cause host hang - bnc#853048 - CVE-2013-6400: xen: XSA-80: IOMMU TLB flushing may be inadvertently suppressed - bnc#831120 - CVE-2013-2212: xen: XSA-60: Excessive time to disable caching with HVM guests with PCI passthrough - bnc#848014 - [HP HPS] Xen hypervisor panics on 8-blades nPar with 46-bit memory addressing - bnc#833251 - [HP BCS SLES11 Bug]: In HPs UEFI x86_64 platform and with xen environment, in booting stage ,xen hypervisor will panic. - pygrub: Support (/dev/xvda) style disk specifications - bnc#849667 - CVE-2014-1895: xen: XSA-74: Lock order reversal between page_alloc_lock and mm_rwlock - bnc#849668 - CVE-2013-4554: xen: XSA-76: Hypercalls exposed to privilege rings 1 and 2 of HVM guests - bnc#842417 - In HPs UEFI x86_64 platform and sles11sp3 with xen environment, dom0 will soft lockup on multiple blades nPar. - bnc#848014 - [HP HPS] Xen hypervisor panics on 8-blades nPar with 46-bit memory addressing - bnc#846849 - Soft lockup with PCI passthrough and many VCPUs - bnc#833483 - Boot Failure with xen kernel in UEFI mode with error
    last seen2020-06-05
    modified2014-06-13
    plugin id75312
    published2014-06-13
    reporterThis script is Copyright (C) 2014-2020 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/75312
    titleopenSUSE Security Update : xen (openSUSE-SU-2014:0483-1)
    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-2014-271.
#
# The text description of this plugin is (C) SUSE LLC.
#

include("compat.inc");

if (description)
{
  script_id(75312);
  script_version("1.4");
  script_set_attribute(attribute:"plugin_modification_date", value:"2020/06/04");

  script_cve_id("CVE-2013-2212", "CVE-2013-4494", "CVE-2013-4551", "CVE-2013-4553", "CVE-2013-4554", "CVE-2013-6400", "CVE-2013-6885", "CVE-2014-1642", "CVE-2014-1666", "CVE-2014-1891", "CVE-2014-1892", "CVE-2014-1893", "CVE-2014-1894", "CVE-2014-1895", "CVE-2014-1896", "CVE-2014-1950");
  script_bugtraq_id(61424, 63494, 63625, 63931, 63933, 63983, 64195, 65097, 65125, 65414, 65419, 65424, 65529);

  script_name(english:"openSUSE Security Update : xen (openSUSE-SU-2014:0483-1)");
  script_summary(english:"Check for the openSUSE-2014-271 patch");

  script_set_attribute(
    attribute:"synopsis", 
    value:"The remote openSUSE host is missing a security update."
  );
  script_set_attribute(
    attribute:"description", 
    value:
"Xen was updated to fix various bugs and security issues :

Update to Xen version 4.2.4 c/s 26280.

  - bnc#861256 - CVE-2014-1950: xen: XSA-88: use-after-free
    in xc_cpupool_getinfo() under memory pressure. (fix
    included with update)

  - bnc#863297: xend/pvscsi: recognize also SCSI CDROM
    devices

  - bnc#858496 - CVE-2014-1642: Xen: XSA-83: Out-of-memory
    condition yielding memory corruption during IRQ setup

  - bnc#860163 - xen: XSA-84: integer overflow in several
    XSM/Flask hypercalls (CVE-2014-1891 CVE-2014-1892
    CVE-2014-1893 CVE-2014-1894)

  - bnc#860165 - CVE-2014-1895: xen: XSA-85: Off-by-one
    error in FLASK_AVC_CACHESTAT hypercall

  - bnc#860300 - CVE-2014-1896: xen: XSA-86: libvchan
    failure handling malicious ring indexes

  - bnc#860302 - CVE-2014-1666: xen: XSA-87:
    PHYSDEVOP_(prepare,release)_msix exposed to unprivileged
    guests

  - bnc#858311 - Server is not booting in kernel XEN after
    latest updates - (XEN) setup 0000:00:18.0 for d0 failed
    (-19)

  - bnc#858496 - CVE-2014-1642: Xen: XSA-83: Out-of-memory
    condition yielding memory corruption during IRQ setup

  - bnc#853049 - CVE-2013-6885: xen: XSA-82: Guest
    triggerable AMD CPU erratum may cause host hang

  - bnc#853048 - CVE-2013-6400: xen: XSA-80: IOMMU TLB
    flushing may be inadvertently suppressed

  - bnc#831120 - CVE-2013-2212: xen: XSA-60: Excessive time
    to disable caching with HVM guests with PCI passthrough

  - bnc#848014 - [HP HPS] Xen hypervisor panics on 8-blades
    nPar with 46-bit memory addressing

  - bnc#833251 - [HP BCS SLES11 Bug]: In HPs UEFI x86_64
    platform and with xen environment, in booting stage ,xen
    hypervisor will panic.

  - pygrub: Support (/dev/xvda) style disk specifications

  - bnc#849667 - CVE-2014-1895: xen: XSA-74: Lock order
    reversal between page_alloc_lock and mm_rwlock

  - bnc#849668 - CVE-2013-4554: xen: XSA-76: Hypercalls
    exposed to privilege rings 1 and 2 of HVM guests

  - bnc#842417 - In HPs UEFI x86_64 platform and sles11sp3
    with xen environment, dom0 will soft lockup on multiple
    blades nPar.

  - bnc#848014 - [HP HPS] Xen hypervisor panics on 8-blades
    nPar with 46-bit memory addressing

  - bnc#846849 - Soft lockup with PCI passthrough and many
    VCPUs

  - bnc#833483 - Boot Failure with xen kernel in UEFI mode
    with error 'No memory for trampoline'

  - bnc#849665 - CVE-2013-4551: xen: XSA-75: Host crash due
    to guest VMX instruction execution

  - The upstream version of checking for xend when using the
    'xl' command is used is not working.

  - bnc#840997 - It is possible to start a VM twice on the
    same node.

  - bnc#848657 - xen: CVE-2013-4494: XSA-73: Lock order
    reversal between page allocation and grant table locks"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.novell.com/show_bug.cgi?id=831120"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.novell.com/show_bug.cgi?id=833251"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.novell.com/show_bug.cgi?id=833483"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.novell.com/show_bug.cgi?id=840997"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.novell.com/show_bug.cgi?id=842417"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.novell.com/show_bug.cgi?id=846849"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.novell.com/show_bug.cgi?id=848014"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.novell.com/show_bug.cgi?id=848657"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.novell.com/show_bug.cgi?id=849665"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.novell.com/show_bug.cgi?id=849667"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.novell.com/show_bug.cgi?id=849668"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.novell.com/show_bug.cgi?id=853048"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.novell.com/show_bug.cgi?id=853049"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.novell.com/show_bug.cgi?id=858311"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.novell.com/show_bug.cgi?id=858496"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.novell.com/show_bug.cgi?id=860163"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.novell.com/show_bug.cgi?id=860165"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.novell.com/show_bug.cgi?id=860300"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.novell.com/show_bug.cgi?id=860302"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.novell.com/show_bug.cgi?id=861256"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.novell.com/show_bug.cgi?id=863297"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://lists.opensuse.org/opensuse-updates/2014-04/msg00010.html"
  );
  script_set_attribute(attribute:"solution", value:"Update the affected xen packages.");
  script_set_cvss_base_vector("CVSS2#AV:A/AC:L/Au:N/C:C/I:C/A:C");
  script_set_cvss_temporal_vector("CVSS2#E:ND/RL:OF/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: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-doc-pdf");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:xen-kmp-default");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:xen-kmp-default-debuginfo");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:xen-kmp-desktop");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:xen-kmp-desktop-debuginfo");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:xen-kmp-pae");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:xen-kmp-pae-debuginfo");
  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:12.3");

  script_set_attribute(attribute:"vuln_publication_date", value:"2013/08/28");
  script_set_attribute(attribute:"patch_publication_date", value:"2014/02/26");
  script_set_attribute(attribute:"plugin_publication_date", value:"2014/06/13");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"This script is Copyright (C) 2014-2020 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 !~ "^(SUSE12\.3)$") audit(AUDIT_OS_RELEASE_NOT, "openSUSE", "12.3", 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:"SUSE12.3", reference:"xen-debugsource-4.2.4_02-1.26.2") ) flag++;
if ( rpm_check(release:"SUSE12.3", reference:"xen-devel-4.2.4_02-1.26.2") ) flag++;
if ( rpm_check(release:"SUSE12.3", reference:"xen-kmp-default-4.2.4_02_k3.7.10_1.28-1.26.2") ) flag++;
if ( rpm_check(release:"SUSE12.3", reference:"xen-kmp-default-debuginfo-4.2.4_02_k3.7.10_1.28-1.26.2") ) flag++;
if ( rpm_check(release:"SUSE12.3", reference:"xen-kmp-desktop-4.2.4_02_k3.7.10_1.28-1.26.2") ) flag++;
if ( rpm_check(release:"SUSE12.3", reference:"xen-kmp-desktop-debuginfo-4.2.4_02_k3.7.10_1.28-1.26.2") ) flag++;
if ( rpm_check(release:"SUSE12.3", reference:"xen-kmp-pae-4.2.4_02_k3.7.10_1.28-1.26.2") ) flag++;
if ( rpm_check(release:"SUSE12.3", reference:"xen-kmp-pae-debuginfo-4.2.4_02_k3.7.10_1.28-1.26.2") ) flag++;
if ( rpm_check(release:"SUSE12.3", reference:"xen-libs-4.2.4_02-1.26.2") ) flag++;
if ( rpm_check(release:"SUSE12.3", reference:"xen-libs-debuginfo-4.2.4_02-1.26.2") ) flag++;
if ( rpm_check(release:"SUSE12.3", reference:"xen-tools-domU-4.2.4_02-1.26.2") ) flag++;
if ( rpm_check(release:"SUSE12.3", reference:"xen-tools-domU-debuginfo-4.2.4_02-1.26.2") ) flag++;
if ( rpm_check(release:"SUSE12.3", cpu:"x86_64", reference:"xen-4.2.4_02-1.26.2") ) flag++;
if ( rpm_check(release:"SUSE12.3", cpu:"x86_64", reference:"xen-doc-html-4.2.4_02-1.26.2") ) flag++;
if ( rpm_check(release:"SUSE12.3", cpu:"x86_64", reference:"xen-doc-pdf-4.2.4_02-1.26.2") ) flag++;
if ( rpm_check(release:"SUSE12.3", cpu:"x86_64", reference:"xen-libs-32bit-4.2.4_02-1.26.2") ) flag++;
if ( rpm_check(release:"SUSE12.3", cpu:"x86_64", reference:"xen-libs-debuginfo-32bit-4.2.4_02-1.26.2") ) flag++;
if ( rpm_check(release:"SUSE12.3", cpu:"x86_64", reference:"xen-tools-4.2.4_02-1.26.2") ) flag++;
if ( rpm_check(release:"SUSE12.3", cpu:"x86_64", reference:"xen-tools-debuginfo-4.2.4_02-1.26.2") ) 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 familySuSE Local Security Checks
    NASL idSUSE_11_XEN-201402-140227.NASL
    descriptionThe SUSE Linux Enterprise Server 11 Service Pack 3 Xen hypervisor and toolset has been updated to 4.2.4 to fix various bugs and security issues : The following security issues have been addressed : - XSA-60: CVE-2013-2212: The vmx_set_uc_mode function in Xen 3.3 through 4.3, when disabling chaches, allows local HVM guests with access to memory mapped I/O regions to cause a denial of service (CPU consumption and possibly hypervisor or guest kernel panic) via a crafted GFN range. (bnc#831120) - XSA-80: CVE-2013-6400: Xen 4.2.x and 4.3.x, when using Intel VT-d and a PCI device has been assigned, does not clear the flag that suppresses IOMMU TLB flushes when unspecified errors occur, which causes the TLB entries to not be flushed and allows local guest administrators to cause a denial of service (host crash) or gain privileges via unspecified vectors. (bnc#853048) - XSA-82: CVE-2013-6885: The microcode on AMD 16h 00h through 0Fh processors does not properly handle the interaction between locked instructions and write-combined memory types, which allows local users to cause a denial of service (system hang) via a crafted application, aka the errata 793 issue. (bnc#853049) - XSA-83: CVE-2014-1642: The IRQ setup in Xen 4.2.x and 4.3.x, when using device passthrough and configured to support a large number of CPUs, frees certain memory that may still be intended for use, which allows local guest administrators to cause a denial of service (memory corruption and hypervisor crash) and possibly execute arbitrary code via vectors related to an out-of-memory error that triggers a (1) use-after-free or (2) double free. (bnc#860092) - XSA-84: CVE-2014-1891: The FLASK_{GET,SET}BOOL, FLASK_USER and FLASK_CONTEXT_TO_SID suboperations of the flask hypercall are vulnerable to an integer overflow on the input size. The hypercalls attempt to allocate a buffer which is 1 larger than this size and is therefore vulnerable to integer overflow and an attempt to allocate then access a zero byte buffer. (bnc#860163) - XSA-84: CVE-2014-1892 / CVE-2014-1893: Xen 3.3 through 4.1, while not affected by the above overflow, have a different overflow issue on FLASK_{GET,SET}BOOL and expose unreasonably large memory allocation to aribitrary guests. (bnc#860163) - XSA-84: CVE-2014-1894: Xen 3.2 (and presumably earlier) exhibit both problems with the overflow issue being present for more than just the suboperations listed above. (bnc#860163) - XSA-85: CVE-2014-1895: The FLASK_AVC_CACHESTAT hypercall, which provides access to per-cpu statistics on the Flask security policy, incorrectly validates the CPU for which statistics are being requested. (bnc#860165) - XSA-86: CVE-2014-1896: libvchan (a library for inter-domain communication) does not correctly handle unusual or malicious contents in the xenstore ring. A malicious guest can exploit this to cause a libvchan-using facility to read or write past the end of the ring. (bnc#860300) - XSA-87: CVE-2014-1666: The do_physdev_op function in Xen 4.1.5, 4.1.6.1, 4.2.2 through 4.2.3, and 4.3.x does not properly restrict access to the (1) PHYSDEVOP_prepare_msix and (2) PHYSDEVOP_release_msix operations, which allows local PV guests to cause a denial of service (host or guest malfunction) or possibly gain privileges via unspecified vectors. (bnc#860302) - XSA-88: CVE-2014-1950: Use-after-free vulnerability in the xc_cpupool_getinfo function in Xen 4.1.x through 4.3.x, when using a multithreaded toolstack, does not properly handle a failure by the xc_cpumap_alloc function, which allows local users with access to management functions to cause a denial of service (heap corruption) and possibly gain privileges via unspecified vectors. (bnc#861256) Also the following non-security bugs have been fixed : - Fixed boot problems with Xen kernel.
    last seen2020-06-05
    modified2014-03-14
    plugin id73015
    published2014-03-14
    reporterThis script is Copyright (C) 2014-2020 Tenable Network Security, Inc.
    sourcehttps://www.tenable.com/plugins/nessus/73015
    titleSuSE 11.3 Security Update : Xen (SAT Patch Number 8973)
    code
    #%NASL_MIN_LEVEL 80502
#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were  
# extracted from SuSE 11 update information. The text itself is
# copyright (C) Novell, Inc.
#

if (NASL_LEVEL < 3000) exit(0);

include("compat.inc");

if (description)
{
  script_id(73015);
  script_version("1.2");
  script_set_attribute(attribute:"plugin_modification_date", value:"2020/06/04");

  script_cve_id("CVE-2013-2212", "CVE-2013-6400", "CVE-2013-6885", "CVE-2014-1642", "CVE-2014-1666", "CVE-2014-1891", "CVE-2014-1892", "CVE-2014-1893", "CVE-2014-1894", "CVE-2014-1895", "CVE-2014-1896", "CVE-2014-1950");

  script_name(english:"SuSE 11.3 Security Update : Xen (SAT Patch Number 8973)");
  script_summary(english:"Checks rpm output for the updated packages");

  script_set_attribute(
    attribute:"synopsis", 
    value:"The remote SuSE 11 host is missing one or more security updates."
  );
  script_set_attribute(
    attribute:"description", 
    value:
"The SUSE Linux Enterprise Server 11 Service Pack 3 Xen hypervisor and
toolset has been updated to 4.2.4 to fix various bugs and security
issues :

The following security issues have been addressed :

  - XSA-60: CVE-2013-2212: The vmx_set_uc_mode function in
    Xen 3.3 through 4.3, when disabling chaches, allows
    local HVM guests with access to memory mapped I/O
    regions to cause a denial of service (CPU consumption
    and possibly hypervisor or guest kernel panic) via a
    crafted GFN range. (bnc#831120)

  - XSA-80: CVE-2013-6400: Xen 4.2.x and 4.3.x, when using
    Intel VT-d and a PCI device has been assigned, does not
    clear the flag that suppresses IOMMU TLB flushes when
    unspecified errors occur, which causes the TLB entries
    to not be flushed and allows local guest administrators
    to cause a denial of service (host crash) or gain
    privileges via unspecified vectors. (bnc#853048)

  - XSA-82: CVE-2013-6885: The microcode on AMD 16h 00h
    through 0Fh processors does not properly handle the
    interaction between locked instructions and
    write-combined memory types, which allows local users to
    cause a denial of service (system hang) via a crafted
    application, aka the errata 793 issue. (bnc#853049)

  - XSA-83: CVE-2014-1642: The IRQ setup in Xen 4.2.x and
    4.3.x, when using device passthrough and configured to
    support a large number of CPUs, frees certain memory
    that may still be intended for use, which allows local
    guest administrators to cause a denial of service
    (memory corruption and hypervisor crash) and possibly
    execute arbitrary code via vectors related to an
    out-of-memory error that triggers a (1) use-after-free
    or (2) double free. (bnc#860092)

  - XSA-84: CVE-2014-1891: The FLASK_{GET,SET}BOOL,
    FLASK_USER and FLASK_CONTEXT_TO_SID suboperations of the
    flask hypercall are vulnerable to an integer overflow on
    the input size. The hypercalls attempt to allocate a
    buffer which is 1 larger than this size and is therefore
    vulnerable to integer overflow and an attempt to
    allocate then access a zero byte buffer. (bnc#860163)

  - XSA-84: CVE-2014-1892 / CVE-2014-1893: Xen 3.3 through
    4.1, while not affected by the above overflow, have a
    different overflow issue on FLASK_{GET,SET}BOOL and
    expose unreasonably large memory allocation to
    aribitrary guests. (bnc#860163)

  - XSA-84: CVE-2014-1894: Xen 3.2 (and presumably earlier)
    exhibit both problems with the overflow issue being
    present for more than just the suboperations listed
    above. (bnc#860163)

  - XSA-85: CVE-2014-1895: The FLASK_AVC_CACHESTAT
    hypercall, which provides access to per-cpu statistics
    on the Flask security policy, incorrectly validates the
    CPU for which statistics are being requested.
    (bnc#860165)

  - XSA-86: CVE-2014-1896: libvchan (a library for
    inter-domain communication) does not correctly handle
    unusual or malicious contents in the xenstore ring. A
    malicious guest can exploit this to cause a
    libvchan-using facility to read or write past the end of
    the ring. (bnc#860300)

  - XSA-87: CVE-2014-1666: The do_physdev_op function in Xen
    4.1.5, 4.1.6.1, 4.2.2 through 4.2.3, and 4.3.x does not
    properly restrict access to the (1)
    PHYSDEVOP_prepare_msix and (2) PHYSDEVOP_release_msix
    operations, which allows local PV guests to cause a
    denial of service (host or guest malfunction) or
    possibly gain privileges via unspecified vectors.
    (bnc#860302)

  - XSA-88: CVE-2014-1950: Use-after-free vulnerability in
    the xc_cpupool_getinfo function in Xen 4.1.x through
    4.3.x, when using a multithreaded toolstack, does not
    properly handle a failure by the xc_cpumap_alloc
    function, which allows local users with access to
    management functions to cause a denial of service (heap
    corruption) and possibly gain privileges via unspecified
    vectors. (bnc#861256)

Also the following non-security bugs have been fixed :

  - Fixed boot problems with Xen kernel. '(XEN) setup
    0000:00:18.0 for d0 failed (-19)'. (bnc#858311)

  - Fixed Xen hypervisor panic on 8-blades nPar with 46-bit
    memory addressing. (bnc#848014)

  - Fixed Xen hypervisor panic in HP's UEFI x86_64 platform
    and with xen environment, in booting stage. (bnc#833251)

  - xend/pvscsi: recognize also SCSI CDROM devices.
    (bnc#863297)

  - pygrub: Support (/dev/xvda) style disk specifications"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.novell.com/show_bug.cgi?id=831120"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.novell.com/show_bug.cgi?id=833251"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.novell.com/show_bug.cgi?id=848014"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.novell.com/show_bug.cgi?id=853048"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.novell.com/show_bug.cgi?id=853049"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.novell.com/show_bug.cgi?id=858311"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.novell.com/show_bug.cgi?id=860092"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.novell.com/show_bug.cgi?id=860163"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.novell.com/show_bug.cgi?id=860165"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.novell.com/show_bug.cgi?id=860300"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.novell.com/show_bug.cgi?id=860302"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.novell.com/show_bug.cgi?id=861256"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.novell.com/show_bug.cgi?id=863297"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"http://support.novell.com/security/cve/CVE-2013-2212.html"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"http://support.novell.com/security/cve/CVE-2013-6400.html"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"http://support.novell.com/security/cve/CVE-2013-6885.html"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"http://support.novell.com/security/cve/CVE-2014-1642.html"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"http://support.novell.com/security/cve/CVE-2014-1666.html"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"http://support.novell.com/security/cve/CVE-2014-1891.html"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"http://support.novell.com/security/cve/CVE-2014-1892.html"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"http://support.novell.com/security/cve/CVE-2014-1893.html"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"http://support.novell.com/security/cve/CVE-2014-1894.html"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"http://support.novell.com/security/cve/CVE-2014-1895.html"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"http://support.novell.com/security/cve/CVE-2014-1896.html"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"http://support.novell.com/security/cve/CVE-2014-1950.html"
  );
  script_set_attribute(attribute:"solution", value:"Apply SAT patch number 8973.");
  script_set_cvss_base_vector("CVSS2#AV:A/AC:L/Au:N/C:C/I:C/A:C");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:11:xen");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:11:xen-doc-html");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:11:xen-doc-pdf");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:11:xen-kmp-default");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:11:xen-kmp-pae");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:11:xen-libs");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:11:xen-libs-32bit");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:11:xen-tools");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:11:xen-tools-domU");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:novell:suse_linux:11");

  script_set_attribute(attribute:"patch_publication_date", value:"2014/02/27");
  script_set_attribute(attribute:"plugin_publication_date", value:"2014/03/14");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"This script is Copyright (C) 2014-2020 Tenable Network Security, Inc.");
  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)11") audit(AUDIT_OS_NOT, "SuSE 11");
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 11", cpu);

pl = get_kb_item("Host/SuSE/patchlevel");
if (isnull(pl) || int(pl) != 3) audit(AUDIT_OS_NOT, "SuSE 11.3");


flag = 0;
if (rpm_check(release:"SLED11", sp:3, cpu:"i586", reference:"xen-kmp-default-4.2.4_02_3.0.101_0.15-0.7.1")) flag++;
if (rpm_check(release:"SLED11", sp:3, cpu:"i586", reference:"xen-kmp-pae-4.2.4_02_3.0.101_0.15-0.7.1")) flag++;
if (rpm_check(release:"SLED11", sp:3, cpu:"i586", reference:"xen-libs-4.2.4_02-0.7.1")) flag++;
if (rpm_check(release:"SLED11", sp:3, cpu:"i586", reference:"xen-tools-domU-4.2.4_02-0.7.1")) flag++;
if (rpm_check(release:"SLED11", sp:3, cpu:"x86_64", reference:"xen-4.2.4_02-0.7.1")) flag++;
if (rpm_check(release:"SLED11", sp:3, cpu:"x86_64", reference:"xen-doc-html-4.2.4_02-0.7.1")) flag++;
if (rpm_check(release:"SLED11", sp:3, cpu:"x86_64", reference:"xen-doc-pdf-4.2.4_02-0.7.1")) flag++;
if (rpm_check(release:"SLED11", sp:3, cpu:"x86_64", reference:"xen-kmp-default-4.2.4_02_3.0.101_0.15-0.7.1")) flag++;
if (rpm_check(release:"SLED11", sp:3, cpu:"x86_64", reference:"xen-libs-4.2.4_02-0.7.1")) flag++;
if (rpm_check(release:"SLED11", sp:3, cpu:"x86_64", reference:"xen-libs-32bit-4.2.4_02-0.7.1")) flag++;
if (rpm_check(release:"SLED11", sp:3, cpu:"x86_64", reference:"xen-tools-4.2.4_02-0.7.1")) flag++;
if (rpm_check(release:"SLED11", sp:3, cpu:"x86_64", reference:"xen-tools-domU-4.2.4_02-0.7.1")) flag++;
if (rpm_check(release:"SLES11", sp:3, cpu:"i586", reference:"xen-kmp-default-4.2.4_02_3.0.101_0.15-0.7.1")) flag++;
if (rpm_check(release:"SLES11", sp:3, cpu:"i586", reference:"xen-kmp-pae-4.2.4_02_3.0.101_0.15-0.7.1")) flag++;
if (rpm_check(release:"SLES11", sp:3, cpu:"i586", reference:"xen-libs-4.2.4_02-0.7.1")) flag++;
if (rpm_check(release:"SLES11", sp:3, cpu:"i586", reference:"xen-tools-domU-4.2.4_02-0.7.1")) flag++;
if (rpm_check(release:"SLES11", sp:3, cpu:"x86_64", reference:"xen-4.2.4_02-0.7.1")) flag++;
if (rpm_check(release:"SLES11", sp:3, cpu:"x86_64", reference:"xen-doc-html-4.2.4_02-0.7.1")) flag++;
if (rpm_check(release:"SLES11", sp:3, cpu:"x86_64", reference:"xen-doc-pdf-4.2.4_02-0.7.1")) flag++;
if (rpm_check(release:"SLES11", sp:3, cpu:"x86_64", reference:"xen-kmp-default-4.2.4_02_3.0.101_0.15-0.7.1")) flag++;
if (rpm_check(release:"SLES11", sp:3, cpu:"x86_64", reference:"xen-libs-4.2.4_02-0.7.1")) flag++;
if (rpm_check(release:"SLES11", sp:3, cpu:"x86_64", reference:"xen-libs-32bit-4.2.4_02-0.7.1")) flag++;
if (rpm_check(release:"SLES11", sp:3, cpu:"x86_64", reference:"xen-tools-4.2.4_02-0.7.1")) flag++;
if (rpm_check(release:"SLES11", sp:3, cpu:"x86_64", reference:"xen-tools-domU-4.2.4_02-0.7.1")) flag++;


if (flag)
{
  if (report_verbosity > 0) security_hole(port:0, extra:rpm_report_get());
  else security_hole(0);
  exit(0);
}
else audit(AUDIT_HOST_NOT, "affected");
  • NASL familyFedora Local Security Checks
    NASL idFEDORA_2014-2170.NASL
    descriptionthree security fixes: integer overflow in several XSM/Flask hypercalls [XSA-84], Off-by-one error in FLASK_AVC_CACHESTAT hypercall [XSA-85], libvchan failure handling malicious ring indexes [XSA-86] Note that Tenable Network Security has extracted the preceding description block directly from the Fedora security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.
    last seen2020-03-17
    modified2014-02-17
    plugin id72539
    published2014-02-17
    reporterThis script is Copyright (C) 2014-2020 Tenable Network Security, Inc.
    sourcehttps://www.tenable.com/plugins/nessus/72539
    titleFedora 20 : xen-4.3.1-9.fc20 (2014-2170)
  • NASL familyGentoo Local Security Checks
    NASL idGENTOO_GLSA-201407-03.NASL
    descriptionThe remote host is affected by the vulnerability described in GLSA-201407-03 (Xen: Multiple Vunlerabilities) Multiple vulnerabilities have been discovered in Xen. Please review the CVE identifiers referenced below for details. Impact : A remote attacker can utilize multiple vectors to execute arbitrary code, cause Denial of Service, or gain access to data on the host. Workaround : There is no known workaround at this time.
    last seen2020-06-01
    modified2020-06-02
    plugin id76544
    published2014-07-17
    reporterThis script is Copyright (C) 2014-2019 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/76544
    titleGLSA-201407-03 : Xen: Multiple Vunlerabilities

References