Ubuntu 14.04 LTS / 16.04 LTS : Imlib2 vulnerabilities (USN-3075-1)

#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Ubuntu Security Notice USN-3075-1. 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(93399);
  script_version("2.11");
  script_set_attribute(attribute:"plugin_modification_date", value:"2024/08/27");

  script_cve_id(
    "CVE-2011-5326",
    "CVE-2014-9762",
    "CVE-2014-9763",
    "CVE-2014-9764",
    "CVE-2014-9771",
    "CVE-2016-3993",
    "CVE-2016-3994",
    "CVE-2016-4024"
  );
  script_xref(name:"USN", value:"3075-1");

  script_name(english:"Ubuntu 14.04 LTS / 16.04 LTS : Imlib2 vulnerabilities (USN-3075-1)");

  script_set_attribute(attribute:"synopsis", value:
"The remote Ubuntu host is missing one or more security updates.");
  script_set_attribute(attribute:"description", value:
"The remote Ubuntu 14.04 LTS / 16.04 LTS host has packages installed that are affected by multiple vulnerabilities as
referenced in the USN-3075-1 advisory.

    Jakub Wilk discovered an out of bounds read in the GIF loader implementation in Imlib2. An attacker could
    use this to cause a denial of service (application crash) or possibly obtain sensitive information.
    (CVE-2016-3994)

    Yuriy M. Kaminskiy discovered an off-by-one error when handling coordinates in Imlib2. An attacker could
    use this to cause a denial of service (application crash). (CVE-2016-3993)

    Yuriy M. Kaminskiy discovered that integer overflows existed in Imlib2 when handling images with large
    dimensions. An attacker could use this to cause a denial of service (memory exhaustion or application
    crash). (CVE-2014-9771, CVE-2016-4024)

    Kevin Ryde discovered that the ellipse drawing code in Imlib2 would attempt to divide by zero when drawing
    a 2x1 ellipse. An attacker could use this to cause a denial of service (application crash).
    (CVE-2011-5326)

    It was discovered that Imlib2 did not properly handled GIF images without colormaps. An attacker could use
    this to cause a denial of service (application crash). This issue only affected Ubuntu 12.04 LTS and
    Ubuntu 14.04 LTS. (CVE-2014-9762)

    It was discovered that Imlib2 did not properly handle some PNM images, leading to a division by zero. An
    attacker could use this to cause a denial of service (application crash). This issue only affected Ubuntu
    12.04 LTS and Ubuntu 14.04 LTS. (CVE-2014-9763)

    It was discovered that Imlib2 did not properly handle error conditions when loading some GIF images. An
    attacker could use this to cause a denial of service (application crash). This issue only affected Ubuntu
    12.04 LTS and Ubuntu 14.04 LTS. (CVE-2014-9764)

Tenable has extracted the preceding description block directly from the Ubuntu security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version
number.");
  script_set_attribute(attribute:"see_also", value:"https://ubuntu.com/security/notices/USN-3075-1");
  script_set_attribute(attribute:"solution", value:
"Update the affected libimlib2 and / or libimlib2-dev packages.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:P");
  script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2016-4024");

  script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"false");

  script_set_attribute(attribute:"vuln_publication_date", value:"2016/05/13");
  script_set_attribute(attribute:"patch_publication_date", value:"2016/09/08");
  script_set_attribute(attribute:"plugin_publication_date", value:"2016/09/09");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libimlib2");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libimlib2-dev");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:14.04:-:lts");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:16.04:-:lts");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_family(english:"Ubuntu Local Security Checks");

  script_copyright(english:"Ubuntu Security Notice (C) 2016-2024 Canonical, Inc. / NASL script (C) 2016-2024 and is owned by Tenable, Inc. or an Affiliate thereof.");

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

  exit(0);
}

include('debian_package.inc');

if ( ! get_kb_item('Host/local_checks_enabled') ) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
var os_release = get_kb_item('Host/Ubuntu/release');
if ( isnull(os_release) ) audit(AUDIT_OS_NOT, 'Ubuntu');
os_release = chomp(os_release);
if (! ('14.04' >< os_release || '16.04' >< os_release)) audit(AUDIT_OS_NOT, 'Ubuntu 14.04 / 16.04', 'Ubuntu ' + os_release);
if ( ! get_kb_item('Host/Debian/dpkg-l') ) audit(AUDIT_PACKAGE_LIST_MISSING);

var cpu = get_kb_item('Host/cpu');
if (isnull(cpu)) audit(AUDIT_UNKNOWN_ARCH);
if ('x86_64' >!< cpu && cpu !~ "^i[3-6]86$" && 's390' >!< cpu && 'aarch64' >!< cpu) audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, 'Ubuntu', cpu);

var pkgs = [
    {'osver': '14.04', 'pkgname': 'libimlib2', 'pkgver': '1.4.6-2ubuntu0.1'},
    {'osver': '14.04', 'pkgname': 'libimlib2-dev', 'pkgver': '1.4.6-2ubuntu0.1'},
    {'osver': '16.04', 'pkgname': 'libimlib2', 'pkgver': '1.4.7-1ubuntu0.1'},
    {'osver': '16.04', 'pkgname': 'libimlib2-dev', 'pkgver': '1.4.7-1ubuntu0.1'}
];

var flag = 0;
foreach var package_array ( pkgs ) {
  var osver = NULL;
  var pkgname = NULL;
  var pkgver = NULL;
  if (!empty_or_null(package_array['osver'])) osver = package_array['osver'];
  if (!empty_or_null(package_array['pkgname'])) pkgname = package_array['pkgname'];
  if (!empty_or_null(package_array['pkgver'])) pkgver = package_array['pkgver'];
  if (osver && pkgname && pkgver) {
    if (ubuntu_check(osver:osver, pkgname:pkgname, pkgver:pkgver)) flag++;
  }
}

if (flag)
{
  var extra = '';
  extra += ubuntu_report_get();
  security_report_v4(
    port       : 0,
    severity   : SECURITY_HOLE,
    extra      : extra
  );
  exit(0);
}
else
{
  var tested = ubuntu_pkg_tests_get();
  if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
  else audit(AUDIT_PACKAGE_NOT_INSTALLED, 'libimlib2 / libimlib2-dev');
}