Ubuntu 12.04 LTS / 14.04 LTS / 16.04 LTS / 16.10 : libgd2 vulnerabilities (USN-3117-1)

2016-11-02T00:00:00
ID UBUNTU_USN-3117-1.NASL
Type nessus
Reporter Tenable
Modified 2018-12-01T00:00:00

Description

Ibrahim El-Sayed discovered that the GD library incorrectly handled certain malformed Tiff images. If a user or automated system were tricked into processing a specially crafted Tiff image, an attacker could cause a denial of service. (CVE-2016-6911)

Ke Liu discovered that the GD library incorrectly handled certain integers when processing WebP images. If a user or automated system were tricked into processing a specially crafted WebP image, an attacker could cause a denial of service, or possibly execute arbitrary code. This issue only applied to Ubuntu 14.04 LTS, Ubuntu 16.04 LTS and Ubuntu 16.10. (CVE-2016-7568)

Emmanuel Law discovered that the GD library incorrectly handled certain strings when creating images. If a user or automated system were tricked into processing a specially crafted image, an attacker could cause a denial of service, or possibly execute arbitrary code. (CVE-2016-8670).

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-3117-1. 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(94466);
  script_version("2.6");
  script_cvs_date("Date: 2018/12/01 15:12:40");

  script_cve_id("CVE-2016-6911", "CVE-2016-7568", "CVE-2016-8670");
  script_xref(name:"USN", value:"3117-1");

  script_name(english:"Ubuntu 12.04 LTS / 14.04 LTS / 16.04 LTS / 16.10 : libgd2 vulnerabilities (USN-3117-1)");
  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:
"Ibrahim El-Sayed discovered that the GD library incorrectly handled
certain malformed Tiff images. If a user or automated system were
tricked into processing a specially crafted Tiff image, an attacker
could cause a denial of service. (CVE-2016-6911)

Ke Liu discovered that the GD library incorrectly handled certain
integers when processing WebP images. If a user or automated system
were tricked into processing a specially crafted WebP image, an
attacker could cause a denial of service, or possibly execute
arbitrary code. This issue only applied to Ubuntu 14.04 LTS, Ubuntu
16.04 LTS and Ubuntu 16.10. (CVE-2016-7568)

Emmanuel Law discovered that the GD library incorrectly handled
certain strings when creating images. If a user or automated system
were tricked into processing a specially crafted image, an attacker
could cause a denial of service, or possibly execute arbitrary code.
(CVE-2016-8670).

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/3117-1/"
  );
  script_set_attribute(
    attribute:"solution", 
    value:"Update the affected libgd2-noxpm, libgd2-xpm and / or libgd3 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:"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:libgd2-noxpm");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libgd2-xpm");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libgd3");
  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:16.04");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:16.10");

  script_set_attribute(attribute:"patch_publication_date", value:"2016/11/01");
  script_set_attribute(attribute:"plugin_publication_date", value:"2016/11/02");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"Ubuntu Security Notice (C) 2016-2018 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|16\.04|16\.10)$", string:release)) audit(AUDIT_OS_NOT, "Ubuntu 12.04 / 14.04 / 16.04 / 16.10", "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:"libgd2-noxpm", pkgver:"2.0.36~rc1~dfsg-6ubuntu2.3")) flag++;
if (ubuntu_check(osver:"12.04", pkgname:"libgd2-xpm", pkgver:"2.0.36~rc1~dfsg-6ubuntu2.3")) flag++;
if (ubuntu_check(osver:"14.04", pkgname:"libgd3", pkgver:"2.1.0-3ubuntu0.5")) flag++;
if (ubuntu_check(osver:"16.04", pkgname:"libgd3", pkgver:"2.1.1-4ubuntu0.16.04.5")) flag++;
if (ubuntu_check(osver:"16.10", pkgname:"libgd3", pkgver:"2.2.1-1ubuntu3.2")) 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, "libgd2-noxpm / libgd2-xpm / libgd3");
}