Vulnerabilities > CVE-2011-2212 - Improper Restriction of Operations within the Bounds of a Memory Buffer vulnerability in Qemu

#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Ubuntu Security Notice USN-1165-1. The text 
# itself is copyright (C) Canonical, Inc. See 
# <http://www.ubuntu.com/usn/>. Ubuntu(R) is a registered 
# trademark of Canonical, Inc.
#

include("compat.inc");

if (description)
{
  script_id(55531);
  script_version("1.10");
  script_cvs_date("Date: 2019/09/19 12:54:27");

  script_cve_id("CVE-2011-2212", "CVE-2011-2512");
  script_bugtraq_id(48499, 48574);
  script_xref(name:"USN", value:"1165-1");

  script_name(english:"Ubuntu 10.04 LTS / 10.10 / 11.04 : qemu-kvm vulnerabilities (USN-1165-1)");
  script_summary(english:"Checks dpkg output for updated packages.");

  script_set_attribute(
    attribute:"synopsis", 
    value:
"The remote Ubuntu host is missing one or more security-related
patches."
  );
  script_set_attribute(
    attribute:"description", 
    value:
"Nelson Elhage discoverd that QEMU did not properly validate certain
virtqueue requests from the guest. An attacker could exploit this to
cause a denial of service of the guest or possibly execute code with
the privileges of the user invoking the program. (CVE-2011-2212)

Stefan Hajnoczi discovered that QEMU did not properly perform integer
comparisons when performing virtqueue input validation. An attacker
could exploit this to cause a denial of service of the guest or
possibly execute code with the privileges of the user invoking the
program. (CVE-2011-2512)

When using QEMU with libvirt or virtualization management software
based on libvirt such as Eucalyptus and OpenStack, QEMU guests are
individually isolated by an AppArmor profile by default in Ubuntu.

Note that Tenable Network Security has extracted the preceding
description block directly from the Ubuntu 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://usn.ubuntu.com/1165-1/"
  );
  script_set_attribute(
    attribute:"solution", 
    value:
"Update the affected qemu-kvm, qemu-kvm-extras and / or
qemu-kvm-extras-static packages."
  );
  script_set_cvss_base_vector("CVSS2#AV:A/AC:M/Au:S/C:C/I:C/A:C");
  script_set_cvss_temporal_vector("CVSS2#E:U/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:canonical:ubuntu_linux:qemu-kvm");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:qemu-kvm-extras");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:qemu-kvm-extras-static");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:10.04:-:lts");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:10.10");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:11.04");

  script_set_attribute(attribute:"vuln_publication_date", value:"2012/06/21");
  script_set_attribute(attribute:"patch_publication_date", value:"2011/07/06");
  script_set_attribute(attribute:"plugin_publication_date", value:"2011/07/07");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"Ubuntu Security Notice (C) 2011-2019 Canonical, Inc. / NASL script (C) 2011-2019 and is owned by Tenable, Inc. or an Affiliate thereof.");
  script_family(english:"Ubuntu Local Security Checks");

  script_dependencies("ssh_get_info.nasl");
  script_require_keys("Host/cpu", "Host/Ubuntu", "Host/Ubuntu/release", "Host/Debian/dpkg-l");

  exit(0);
}


include("audit.inc");
include("ubuntu.inc");
include("misc_func.inc");

if ( ! get_kb_item("Host/local_checks_enabled") ) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
release = get_kb_item("Host/Ubuntu/release");
if ( isnull(release) ) audit(AUDIT_OS_NOT, "Ubuntu");
release = chomp(release);
if (! preg(pattern:"^(10\.04|10\.10|11\.04)$", string:release)) audit(AUDIT_OS_NOT, "Ubuntu 10.04 / 10.10 / 11.04", "Ubuntu " + release);
if ( ! get_kb_item("Host/Debian/dpkg-l") ) 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, "Ubuntu", cpu);

flag = 0;

if (ubuntu_check(osver:"10.04", pkgname:"qemu-kvm", pkgver:"0.12.3+noroms-0ubuntu9.12")) flag++;
if (ubuntu_check(osver:"10.04", pkgname:"qemu-kvm-extras", pkgver:"0.12.3+noroms-0ubuntu9.12")) flag++;
if (ubuntu_check(osver:"10.04", pkgname:"qemu-kvm-extras-static", pkgver:"0.12.3+noroms-0ubuntu9.12")) flag++;
if (ubuntu_check(osver:"10.10", pkgname:"qemu-kvm", pkgver:"0.12.5+noroms-0ubuntu7.8")) flag++;
if (ubuntu_check(osver:"10.10", pkgname:"qemu-kvm-extras", pkgver:"0.12.5+noroms-0ubuntu7.8")) flag++;
if (ubuntu_check(osver:"10.10", pkgname:"qemu-kvm-extras-static", pkgver:"0.12.5+noroms-0ubuntu7.8")) flag++;
if (ubuntu_check(osver:"11.04", pkgname:"qemu-kvm", pkgver:"0.14.0+noroms-0ubuntu4.3")) flag++;

if (flag)
{
  security_report_v4(
    port       : 0,
    severity   : SECURITY_HOLE,
    extra      : ubuntu_report_get()
  );
  exit(0);
}
else
{
  tested = ubuntu_pkg_tests_get();
  if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
  else audit(AUDIT_PACKAGE_NOT_INSTALLED, "qemu-kvm / qemu-kvm-extras / qemu-kvm-extras-static");
}

#%NASL_MIN_LEVEL 80502
#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Red Hat Security Advisory RHSA-2011:0919 and 
# Oracle Linux Security Advisory ELSA-2011-0919 respectively.
#

include("compat.inc");

if (description)
{
  script_id(68301);
  script_version("1.7");
  script_cvs_date("Date: 2019/10/25 13:36:09");

  script_cve_id("CVE-2011-2212", "CVE-2011-2512");
  script_xref(name:"RHSA", value:"2011:0919");

  script_name(english:"Oracle Linux 6 : qemu-kvm (ELSA-2011-0919)");
  script_summary(english:"Checks rpm output for the updated packages");

  script_set_attribute(
    attribute:"synopsis", 
    value:"The remote Oracle Linux host is missing one or more security updates."
  );
  script_set_attribute(
    attribute:"description", 
    value:
"From Red Hat Security Advisory 2011:0919 :

Updated qemu-kvm packages that fix two security issues and one bug are
now available for Red Hat Enterprise Linux 6.

The Red Hat Security Response Team has rated this update as having
important security impact. Common Vulnerability Scoring System (CVSS)
base scores, which give detailed severity ratings, are available for
each vulnerability from the CVE links in the References section.

KVM (Kernel-based Virtual Machine) is a full virtualization solution
for Linux on AMD64 and Intel 64 systems. qemu-kvm is the user-space
component for running virtual machines using KVM.

It was found that the virtio subsystem in qemu-kvm did not properly
validate virtqueue in and out requests from the guest. A privileged
guest user could use this flaw to trigger a buffer overflow, allowing
them to crash the guest (denial of service) or, possibly, escalate
their privileges on the host. (CVE-2011-2212)

It was found that the virtio_queue_notify() function in qemu-kvm did
not perform sufficient input validation on the value later used as an
index into the array of virtqueues. An unprivileged guest user could
use this flaw to crash the guest (denial of service) or, possibly,
escalate their privileges on the host. (CVE-2011-2512)

Red Hat would like to thank Nelson Elhage for reporting CVE-2011-2212.

This update also fixes the following bug :

* A bug was found in the way vhost (in qemu-kvm) set up mappings with
the host kernel's vhost module. This could result in the host kernel's
vhost module not having a complete view of a guest system's memory, if
that guest had more than 4 GB of memory. Consequently, hot plugging a
vhost-net network device and restarting the guest may have resulted in
that device no longer working. (BZ#701771)

All users of qemu-kvm should upgrade to these updated packages, which
contain backported patches to resolve these issues. After installing
this update, shut down all running virtual machines. Once all virtual
machines have shut down, start them again for this update to take
effect."
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://oss.oracle.com/pipermail/el-errata/2011-July/002216.html"
  );
  script_set_attribute(
    attribute:"solution", 
    value:"Update the affected qemu-kvm packages."
  );
  script_set_cvss_base_vector("CVSS2#AV:A/AC:M/Au:S/C:C/I:C/A:C");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:qemu-img");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:qemu-kvm");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:qemu-kvm-tools");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:oracle:linux:6");

  script_set_attribute(attribute:"vuln_publication_date", value:"2012/06/21");
  script_set_attribute(attribute:"patch_publication_date", value:"2011/07/05");
  script_set_attribute(attribute:"plugin_publication_date", value:"2013/07/12");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"This script is Copyright (C) 2013-2019 and is owned by Tenable, Inc. or an Affiliate thereof.");
  script_family(english:"Oracle Linux Local Security Checks");

  script_dependencies("ssh_get_info.nasl");
  script_require_keys("Host/local_checks_enabled", "Host/OracleLinux", "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);
if (!get_kb_item("Host/OracleLinux")) audit(AUDIT_OS_NOT, "Oracle Linux");
release = get_kb_item("Host/RedHat/release");
if (isnull(release) || !pregmatch(pattern: "Oracle (?:Linux Server|Enterprise Linux)", string:release)) audit(AUDIT_OS_NOT, "Oracle Linux");
os_ver = pregmatch(pattern: "Oracle (?:Linux Server|Enterprise Linux) .*release ([0-9]+(\.[0-9]+)?)", string:release);
if (isnull(os_ver)) audit(AUDIT_UNKNOWN_APP_VER, "Oracle Linux");
os_ver = os_ver[1];
if (! preg(pattern:"^6([^0-9]|$)", string:os_ver)) audit(AUDIT_OS_NOT, "Oracle Linux 6", "Oracle Linux " + 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, "Oracle Linux", cpu);
if ("x86_64" >!< cpu) audit(AUDIT_ARCH_NOT, "x86_64", cpu);

flag = 0;
if (rpm_check(release:"EL6", cpu:"x86_64", reference:"qemu-img-0.12.1.2-2.160.el6_1.2")) flag++;
if (rpm_check(release:"EL6", cpu:"x86_64", reference:"qemu-kvm-0.12.1.2-2.160.el6_1.2")) flag++;
if (rpm_check(release:"EL6", cpu:"x86_64", reference:"qemu-kvm-tools-0.12.1.2-2.160.el6_1.2")) 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, "qemu-img / qemu-kvm / qemu-kvm-tools");
}

#%NASL_MIN_LEVEL 80502
#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from openSUSE Security Update kvm-4863.
#
# The text description of this plugin is (C) SUSE LLC.
#

include("compat.inc");

if (description)
{
  script_id(75888);
  script_version("1.5");
  script_cvs_date("Date: 2019/10/25 13:36:42");

  script_cve_id("CVE-2011-2212", "CVE-2011-2512");
  script_bugtraq_id(48499, 48574);

  script_name(english:"openSUSE Security Update : kvm (openSUSE-SU-2011:0803-1)");
  script_summary(english:"Check for the kvm-4863 patch");

  script_set_attribute(
    attribute:"synopsis", 
    value:"The remote openSUSE host is missing a security update."
  );
  script_set_attribute(
    attribute:"description", 
    value:
"A privileged guest user could cause a buffer overflow in the virtio
subsystem of the host, therefore crashing the guest or potentially
execute arbitrary code on the host (CVE-2011-2212, CVE-2011-2512)."
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.novell.com/show_bug.cgi?id=701161"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.novell.com/show_bug.cgi?id=702823"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://lists.opensuse.org/opensuse-updates/2011-07/msg00025.html"
  );
  script_set_attribute(attribute:"solution", value:"Update the affected kvm packages.");
  script_set_cvss_base_vector("CVSS2#AV:A/AC:M/Au:S/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:kvm");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:kvm-debuginfo");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:kvm-debugsource");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:novell:opensuse:11.4");

  script_set_attribute(attribute:"patch_publication_date", value:"2011/07/11");
  script_set_attribute(attribute:"plugin_publication_date", value:"2014/06/13");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"This script is Copyright (C) 2014-2019 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/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 !~ "^(SUSE11\.4)$") audit(AUDIT_OS_RELEASE_NOT, "openSUSE", "11.4", 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:"SUSE11.4", reference:"kvm-0.14.0.0-1.10.1") ) flag++;
if ( rpm_check(release:"SUSE11.4", reference:"kvm-debuginfo-0.14.0.0-1.10.1") ) flag++;
if ( rpm_check(release:"SUSE11.4", reference:"kvm-debugsource-0.14.0.0-1.10.1") ) 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, "kvm / kvm-debuginfo / kvm-debugsource");
}