Ubuntu 8.04 LTS / 9.04 / 9.10 / 10.04 LTS : gnupg2 vulnerability (USN-970-1)

#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Ubuntu Security Notice USN-970-1. 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(48315);
  script_version("1.13");
  script_cvs_date("Date: 2019/09/19 12:54:26");

  script_cve_id("CVE-2010-2547");
  script_bugtraq_id(41945);
  script_xref(name:"USN", value:"970-1");

  script_name(english:"Ubuntu 8.04 LTS / 9.04 / 9.10 / 10.04 LTS : gnupg2 vulnerability (USN-970-1)");
  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 GPGSM in GnuPG2 did not correctly handle
certificates with a large number of Subject Alternate Names. If a user
or automated system were tricked into processing a specially crafted
certificate, an attacker could cause a denial of service or execute
arbitrary code with 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:"see_also",
    value:"https://usn.ubuntu.com/970-1/"
  );
  script_set_attribute(
    attribute:"solution", 
    value:"Update the affected gnupg-agent, gnupg2 and / or gpgsm packages."
  );
  script_set_cvss_base_vector("CVSS2#AV:N/AC:H/Au:N/C:P/I:P/A:P");
  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-agent");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:gnupg2");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:gpgsm");
  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:8.04:-:lts");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:9.04");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:9.10");

  script_set_attribute(attribute:"vuln_publication_date", value:"2010/08/05");
  script_set_attribute(attribute:"patch_publication_date", value:"2010/08/11");
  script_set_attribute(attribute:"plugin_publication_date", value:"2010/08/12");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"Ubuntu Security Notice (C) 2010-2019 Canonical, Inc. / NASL script (C) 2010-2019 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:"^(8\.04|9\.04|9\.10|10\.04)$", string:release)) audit(AUDIT_OS_NOT, "Ubuntu 8.04 / 9.04 / 9.10 / 10.04", "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:"8.04", pkgname:"gnupg-agent", pkgver:"2.0.7-1ubuntu0.1")) flag++;
if (ubuntu_check(osver:"8.04", pkgname:"gnupg2", pkgver:"2.0.7-1ubuntu0.1")) flag++;
if (ubuntu_check(osver:"8.04", pkgname:"gpgsm", pkgver:"2.0.7-1ubuntu0.1")) flag++;
if (ubuntu_check(osver:"9.04", pkgname:"gnupg-agent", pkgver:"2.0.9-3.1ubuntu0.1")) flag++;
if (ubuntu_check(osver:"9.04", pkgname:"gnupg2", pkgver:"2.0.9-3.1ubuntu0.1")) flag++;
if (ubuntu_check(osver:"9.04", pkgname:"gpgsm", pkgver:"2.0.9-3.1ubuntu0.1")) flag++;
if (ubuntu_check(osver:"9.10", pkgname:"gnupg-agent", pkgver:"2.0.12-0ubuntu2.1")) flag++;
if (ubuntu_check(osver:"9.10", pkgname:"gnupg2", pkgver:"2.0.12-0ubuntu2.1")) flag++;
if (ubuntu_check(osver:"9.10", pkgname:"gpgsm", pkgver:"2.0.12-0ubuntu2.1")) flag++;
if (ubuntu_check(osver:"10.04", pkgname:"gnupg-agent", pkgver:"2.0.14-1ubuntu1.2")) flag++;
if (ubuntu_check(osver:"10.04", pkgname:"gnupg2", pkgver:"2.0.14-1ubuntu1.2")) flag++;
if (ubuntu_check(osver:"10.04", pkgname:"gpgsm", pkgver:"2.0.14-1ubuntu1.2")) 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-agent / gnupg2 / gpgsm");
}