Ubuntu 8.04 LTS / 9.10 / 10.04 LTS / 10.10 : x11-xserver-utils vulnerability (USN-1107-1)

#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Ubuntu Security Notice USN-1107-1. 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(53321);
  script_version("1.12");
  script_cvs_date("Date: 2019/09/19 12:54:27");

  script_cve_id("CVE-2011-0465");
  script_bugtraq_id(47189);
  script_xref(name:"USN", value:"1107-1");
  script_xref(name:"IAVA", value:"2017-A-0098");

  script_name(english:"Ubuntu 8.04 LTS / 9.10 / 10.04 LTS / 10.10 : x11-xserver-utils vulnerability (USN-1107-1)");
  script_summary(english:"Checks dpkg output for updated package.");

  script_set_attribute(
    attribute:"synopsis", 
    value:"The remote Ubuntu host is missing a security-related patch."
  );
  script_set_attribute(
    attribute:"description", 
    value:
"Sebastian Krahmer discovered that the xrdb utility incorrectly
filtered crafted hostnames. An attacker could use this flaw with a
malicious DHCP server or with a remote xdmcp login and execute
arbitrary code, resulting in root privilege escalation.

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/1107-1/"
  );
  script_set_attribute(
    attribute:"solution", 
    value:"Update the affected x11-xserver-utils package."
  );
  script_set_cvss_base_vector("CVSS2#AV:N/AC:M/Au:N/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:x11-xserver-utils");
  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:8.04:-:lts");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:9.10");

  script_set_attribute(attribute:"vuln_publication_date", value:"2011/04/08");
  script_set_attribute(attribute:"patch_publication_date", value:"2011/04/06");
  script_set_attribute(attribute:"plugin_publication_date", value:"2011/04/07");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_set_attribute(attribute:"stig_severity", value:"II");
  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:"^(8\.04|9\.10|10\.04|10\.10)$", string:release)) audit(AUDIT_OS_NOT, "Ubuntu 8.04 / 9.10 / 10.04 / 10.10", "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:"8.04", pkgname:"x11-xserver-utils", pkgver:"7.3+2ubuntu0.1")) flag++;
if (ubuntu_check(osver:"9.10", pkgname:"x11-xserver-utils", pkgver:"7.4+2ubuntu3.1")) flag++;
if (ubuntu_check(osver:"10.04", pkgname:"x11-xserver-utils", pkgver:"7.5+1ubuntu2.1")) flag++;
if (ubuntu_check(osver:"10.10", pkgname:"x11-xserver-utils", pkgver:"7.5+2ubuntu1.1")) 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, "x11-xserver-utils");
}