Ubuntu 10.04 LTS / 12.04 LTS / 12.10 / 13.04 : gnupg, gnupg2 vulnerabilities (USN-1987-1)

2013-10-10T00:00:00
ID UBUNTU_USN-1987-1.NASL
Type nessus
Reporter Tenable
Modified 2018-12-01T00:00:00

Description

Daniel Kahn Gillmor discovered that GnuPG treated keys with empty usage flags as being valid for all usages. (CVE-2013-4351)

Taylor R Campbell discovered that GnuPG incorrectly handled certain OpenPGP messages. If a user or automated system were tricked into processing a specially crafted message, GnuPG could consume resources, resulting in a denial of service. (CVE-2013-4402).

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-1987-1. 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(70366);
  script_version("1.8");
  script_cvs_date("Date: 2018/12/01 13:19:08");

  script_cve_id("CVE-2013-4351", "CVE-2013-4402");
  script_bugtraq_id(62857);
  script_xref(name:"USN", value:"1987-1");

  script_name(english:"Ubuntu 10.04 LTS / 12.04 LTS / 12.10 / 13.04 : gnupg, gnupg2 vulnerabilities (USN-1987-1)");
  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:
"Daniel Kahn Gillmor discovered that GnuPG treated keys with empty
usage flags as being valid for all usages. (CVE-2013-4351)

Taylor R Campbell discovered that GnuPG incorrectly handled certain
OpenPGP messages. If a user or automated system were tricked into
processing a specially crafted message, GnuPG could consume resources,
resulting in a denial of service. (CVE-2013-4402).

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/1987-1/"
  );
  script_set_attribute(
    attribute:"solution", 
    value:"Update the affected gnupg and / or gnupg2 packages."
  );
  script_set_cvss_base_vector("CVSS2#AV:N/AC:M/Au:N/C:P/I:P/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:gnupg");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:gnupg2");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:10.04:-:lts");
  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:12.10");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:13.04");

  script_set_attribute(attribute:"patch_publication_date", value:"2013/10/09");
  script_set_attribute(attribute:"plugin_publication_date", value:"2013/10/10");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"Ubuntu Security Notice (C) 2013-2018 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:"^(10\.04|12\.04|12\.10|13\.04)$", string:release)) audit(AUDIT_OS_NOT, "Ubuntu 10.04 / 12.04 / 12.10 / 13.04", "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:"10.04", pkgname:"gnupg", pkgver:"1.4.10-2ubuntu1.4")) flag++;
if (ubuntu_check(osver:"10.04", pkgname:"gnupg2", pkgver:"2.0.14-1ubuntu1.6")) flag++;
if (ubuntu_check(osver:"12.04", pkgname:"gnupg", pkgver:"1.4.11-3ubuntu2.4")) flag++;
if (ubuntu_check(osver:"12.04", pkgname:"gnupg2", pkgver:"2.0.17-2ubuntu2.12.04.3")) flag++;
if (ubuntu_check(osver:"12.10", pkgname:"gnupg", pkgver:"1.4.11-3ubuntu4.3")) flag++;
if (ubuntu_check(osver:"12.10", pkgname:"gnupg2", pkgver:"2.0.17-2ubuntu3.2")) flag++;
if (ubuntu_check(osver:"13.04", pkgname:"gnupg", pkgver:"1.4.12-7ubuntu1.2")) flag++;
if (ubuntu_check(osver:"13.04", pkgname:"gnupg2", pkgver:"2.0.19-2ubuntu1.1")) 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, "gnupg / gnupg2");
}