Ubuntu 12.04 LTS / 14.04 LTS / 14.10 : xorg-server, xorg-server-lts-trusty, xorg-server-lts-utopic vulnerabilities (USN-2500-1)

2015-02-18T00:00:00
ID UBUNTU_USN-2500-1.NASL
Type nessus
Reporter Tenable
Modified 2018-12-01T00:00:00

Description

Olivier Fourdan discovered that the X.Org X server incorrectly handled XkbSetGeometry requests resulting in an information leak. An attacker able to connect to an X server, either locally or remotely, could use this issue to possibly obtain sensitive information. (CVE-2015-0255)

It was discovered that the X.Org X server incorrectly handled certain trapezoids. An attacker able to connect to an X server, either locally or remotely, could use this issue to possibly crash the server. This issue only affected Ubuntu 12.04 LTS. (CVE-2013-6424).

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.

                                        
                                            #
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Ubuntu Security Notice USN-2500-1. 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(81398);
  script_version("1.6");
  script_cvs_date("Date: 2018/12/01 15:12:39");

  script_cve_id("CVE-2013-6424", "CVE-2015-0255");
  script_bugtraq_id(64127, 72578);
  script_xref(name:"USN", value:"2500-1");

  script_name(english:"Ubuntu 12.04 LTS / 14.04 LTS / 14.10 : xorg-server, xorg-server-lts-trusty, xorg-server-lts-utopic vulnerabilities (USN-2500-1)");
  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:
"Olivier Fourdan discovered that the X.Org X server incorrectly handled
XkbSetGeometry requests resulting in an information leak. An attacker
able to connect to an X server, either locally or remotely, could use
this issue to possibly obtain sensitive information. (CVE-2015-0255)

It was discovered that the X.Org X server incorrectly handled certain
trapezoids. An attacker able to connect to an X server, either locally
or remotely, could use this issue to possibly crash the server. This
issue only affected Ubuntu 12.04 LTS. (CVE-2013-6424).

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/2500-1/"
  );
  script_set_attribute(
    attribute:"solution", 
    value:
"Update the affected xserver-xorg-core, xserver-xorg-core-lts-trusty
and / or xserver-xorg-core-lts-utopic packages."
  );
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:P/I:N/A:P");
  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:xserver-xorg-core");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:xserver-xorg-core-lts-trusty");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:xserver-xorg-core-lts-utopic");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:12.04:-:lts");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:14.04");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:14.10");

  script_set_attribute(attribute:"patch_publication_date", value:"2015/02/17");
  script_set_attribute(attribute:"plugin_publication_date", value:"2015/02/18");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"Ubuntu Security Notice (C) 2015-2018 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:"^(12\.04|14\.04|14\.10)$", string:release)) audit(AUDIT_OS_NOT, "Ubuntu 12.04 / 14.04 / 14.10", "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:"12.04", pkgname:"xserver-xorg-core", pkgver:"2:1.11.4-0ubuntu10.17")) flag++;
if (ubuntu_check(osver:"12.04", pkgname:"xserver-xorg-core-lts-trusty", pkgver:"2:1.15.1-0ubuntu2~precise5")) flag++;
if (ubuntu_check(osver:"14.04", pkgname:"xserver-xorg-core", pkgver:"2:1.15.1-0ubuntu2.7")) flag++;
if (ubuntu_check(osver:"14.04", pkgname:"xserver-xorg-core-lts-utopic", pkgver:"2:1.16.0-1ubuntu1.2~trusty2")) flag++;
if (ubuntu_check(osver:"14.10", pkgname:"xserver-xorg-core", pkgver:"2:1.16.0-1ubuntu1.3")) flag++;

if (flag)
{
  security_report_v4(
    port       : 0,
    severity   : SECURITY_WARNING,
    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, "xserver-xorg-core / xserver-xorg-core-lts-trusty / etc");
}