Vulnerabilities > CVE-2008-5086 - Local Security Bypass vulnerability in libvirt

#%NASL_MIN_LEVEL 80502
#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Ubuntu Security Notice USN-694-1. 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(37984);
  script_version("1.12");
  script_cvs_date("Date: 2019/08/02 13:33:02");

  script_cve_id("CVE-2008-5086");
  script_xref(name:"USN", value:"694-1");

  script_name(english:"Ubuntu 7.10 / 8.04 LTS / 8.10 : libvirt vulnerability (USN-694-1)");
  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:
"It was discovered that libvirt did not mark certain operations as
read-only. A local attacker may be able to perform privileged actions
such as migrating virtual machines, adjusting autostart flags, or
accessing privileged data in the virtual machine memory and disks.

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/694-1/"
  );
  script_set_attribute(attribute:"solution", value:"Update the affected packages.");
  script_set_cvss_base_vector("CVSS2#AV:L/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:canonical:ubuntu_linux:libvirt-bin");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libvirt-dev");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libvirt-doc");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libvirt0");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libvirt0-dbg");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:python-libvirt");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:7.10");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:8.04:-:lts");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:8.10");

  script_set_attribute(attribute:"patch_publication_date", value:"2008/12/17");
  script_set_attribute(attribute:"plugin_publication_date", value:"2009/04/23");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"Ubuntu Security Notice (C) 2009-2019 Canonical, Inc. / NASL script (C) 2018 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 (! ereg(pattern:"^(7\.10|8\.04|8\.10)$", string:release)) audit(AUDIT_OS_NOT, "Ubuntu 7.10 / 8.04 / 8.10", "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:"7.10", pkgname:"libvirt-bin", pkgver:"0.3.0-0ubuntu2.1")) flag++;
if (ubuntu_check(osver:"7.10", pkgname:"libvirt-dev", pkgver:"0.3.0-0ubuntu2.1")) flag++;
if (ubuntu_check(osver:"7.10", pkgname:"libvirt0", pkgver:"0.3.0-0ubuntu2.1")) flag++;
if (ubuntu_check(osver:"7.10", pkgname:"python-libvirt", pkgver:"0.3.0-0ubuntu2.1")) flag++;
if (ubuntu_check(osver:"8.04", pkgname:"libvirt-bin", pkgver:"0.4.0-2ubuntu8.1")) flag++;
if (ubuntu_check(osver:"8.04", pkgname:"libvirt-dev", pkgver:"0.4.0-2ubuntu8.1")) flag++;
if (ubuntu_check(osver:"8.04", pkgname:"libvirt-doc", pkgver:"0.4.0-2ubuntu8.1")) flag++;
if (ubuntu_check(osver:"8.04", pkgname:"libvirt0", pkgver:"0.4.0-2ubuntu8.1")) flag++;
if (ubuntu_check(osver:"8.04", pkgname:"libvirt0-dbg", pkgver:"0.4.0-2ubuntu8.1")) flag++;
if (ubuntu_check(osver:"8.04", pkgname:"python-libvirt", pkgver:"0.4.0-2ubuntu8.1")) flag++;
if (ubuntu_check(osver:"8.10", pkgname:"libvirt-bin", pkgver:"0.4.4-3ubuntu3.1")) flag++;
if (ubuntu_check(osver:"8.10", pkgname:"libvirt-dev", pkgver:"0.4.4-3ubuntu3.1")) flag++;
if (ubuntu_check(osver:"8.10", pkgname:"libvirt-doc", pkgver:"0.4.4-3ubuntu3.1")) flag++;
if (ubuntu_check(osver:"8.10", pkgname:"libvirt0", pkgver:"0.4.4-3ubuntu3.1")) flag++;
if (ubuntu_check(osver:"8.10", pkgname:"libvirt0-dbg", pkgver:"0.4.4-3ubuntu3.1")) flag++;
if (ubuntu_check(osver:"8.10", pkgname:"python-libvirt", pkgver:"0.4.4-3ubuntu3.1")) 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, "libvirt-bin / libvirt-dev / libvirt-doc / libvirt0 / libvirt0-dbg / etc");
}