Ubuntu 14.04 LTS / 16.04 LTS : imagemagick regression (USN-3363-2)

2017-08-01T00:00:00
ID UBUNTU_USN-3363-2.NASL
Type nessus
Reporter Tenable
Modified 2018-08-08T00:00:00

Description

USN-3363-1 fixed vulnerabilities in ImageMagick. The update caused a regression for certain users when processing images. The problematic patch has been reverted pending further investigation.

We apologize for the inconvenience.

It was discovered that ImageMagick incorrectly handled certain malformed image files. If a user or automated system using ImageMagick were tricked into opening a specially crafted image, an attacker could exploit this to cause a denial of service or possibly execute code with the privileges of the user invoking the program.

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-3363-2. 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(102091);
  script_version("3.5");
  script_cvs_date("Date: 2018/08/08 12:52:14");

  script_xref(name:"USN", value:"3363-2");

  script_name(english:"Ubuntu 14.04 LTS / 16.04 LTS : imagemagick regression (USN-3363-2)");
  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:
"USN-3363-1 fixed vulnerabilities in ImageMagick. The update caused a
regression for certain users when processing images. The problematic
patch has been reverted pending further investigation.

We apologize for the inconvenience.

It was discovered that ImageMagick incorrectly handled certain
malformed image files. If a user or automated system using ImageMagick
were tricked into opening a specially crafted image, an attacker could
exploit this to cause a denial of service or possibly execute code
with the privileges of the user invoking the program.

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:"solution", value:"Update the affected packages.");
  script_set_attribute(attribute:"risk_factor", value:"High");
  script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:C");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:imagemagick");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:imagemagick-6.q16");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libmagick++-6.q16-5v5");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libmagick++5");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libmagickcore-6.q16-2");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libmagickcore5");
  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:"patch_publication_date", value:"2017/07/31");
  script_set_attribute(attribute:"plugin_publication_date", value:"2017/08/01");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"Ubuntu Security Notice (C) 2017-2018 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:"^(14\.04|16\.04)$", string:release)) audit(AUDIT_OS_NOT, "Ubuntu 14.04 / 16.04", "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:"14.04", pkgname:"imagemagick", pkgver:"8:6.7.7.10-6ubuntu3.9")) flag++;
if (ubuntu_check(osver:"14.04", pkgname:"libmagick++5", pkgver:"8:6.7.7.10-6ubuntu3.9")) flag++;
if (ubuntu_check(osver:"14.04", pkgname:"libmagickcore5", pkgver:"8:6.7.7.10-6ubuntu3.9")) flag++;
if (ubuntu_check(osver:"16.04", pkgname:"imagemagick", pkgver:"8:6.8.9.9-7ubuntu5.9")) flag++;
if (ubuntu_check(osver:"16.04", pkgname:"imagemagick-6.q16", pkgver:"8:6.8.9.9-7ubuntu5.9")) flag++;
if (ubuntu_check(osver:"16.04", pkgname:"libmagick++-6.q16-5v5", pkgver:"8:6.8.9.9-7ubuntu5.9")) flag++;
if (ubuntu_check(osver:"16.04", pkgname:"libmagickcore-6.q16-2", pkgver:"8:6.8.9.9-7ubuntu5.9")) 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, "imagemagick / imagemagick-6.q16 / libmagick++-6.q16-5v5 / etc");
}