Ubuntu 11.10 : lightdm vulnerabilities (USN-1262-1)

#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Ubuntu Security Notice USN-1262-1. 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(56854);
  script_version("1.13");
  script_cvs_date("Date: 2019/09/19 12:54:27");

  script_cve_id("CVE-2011-3153", "CVE-2011-4105");
  script_bugtraq_id(50511, 50685, 50688);
  script_xref(name:"USN", value:"1262-1");

  script_name(english:"Ubuntu 11.10 : lightdm vulnerabilities (USN-1262-1)");
  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 Light Display Manager incorrectly handled
privileges when reading .dmrc files. A local attacker could exploit
this issue to read arbitrary configuration files, bypassing intended
permissions. (CVE-2011-3153)

It was discovered that Light Display Manager incorrectly handled links
when adjusting permissions on .Xauthority files. A local attacker
could exploit this issue to access arbitrary files, and possibly
obtain increased privileges. In the default Ubuntu installation, this
would be prevented by the Yama link restrictions. (CVE-2011-4105).

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/1262-1/"
  );
  script_set_attribute(
    attribute:"solution", 
    value:
"Update the affected liblightdm-gobject-1-0, liblightdm-qt-1-0 and / or
lightdm packages."
  );
  script_set_cvss_base_vector("CVSS2#AV:L/AC:M/Au:N/C:P/I:N/A:N");
  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:liblightdm-gobject-1-0");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:liblightdm-qt-1-0");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:lightdm");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:11.10");

  script_set_attribute(attribute:"vuln_publication_date", value:"2012/02/17");
  script_set_attribute(attribute:"patch_publication_date", value:"2011/11/15");
  script_set_attribute(attribute:"plugin_publication_date", value:"2011/11/16");
  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:"^(11\.10)$", string:release)) audit(AUDIT_OS_NOT, "Ubuntu 11.10", "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:"11.10", pkgname:"liblightdm-gobject-1-0", pkgver:"1.0.6-0ubuntu1.1")) flag++;
if (ubuntu_check(osver:"11.10", pkgname:"liblightdm-qt-1-0", pkgver:"1.0.6-0ubuntu1.1")) flag++;
if (ubuntu_check(osver:"11.10", pkgname:"lightdm", pkgver:"1.0.6-0ubuntu1.1")) flag++;

if (flag)
{
  security_report_v4(
    port       : 0,
    severity   : SECURITY_NOTE,
    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, "liblightdm-gobject-1-0 / liblightdm-qt-1-0 / lightdm");
}