Ubuntu 10.04 LTS / 11.10 / 12.04 LTS / 12.10 : ruby1.8, ruby1.9.1 vulnerability (USN-1780-1)

#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Ubuntu Security Notice USN-1780-1. 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(65686);
  script_version("1.9");
  script_cvs_date("Date: 2019/09/19 12:54:29");

  script_cve_id("CVE-2013-1821");
  script_bugtraq_id(58141);
  script_xref(name:"USN", value:"1780-1");

  script_name(english:"Ubuntu 10.04 LTS / 11.10 / 12.04 LTS / 12.10 : ruby1.8, ruby1.9.1 vulnerability (USN-1780-1)");
  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:
"Ben Murphy discovered that the Ruby REXML library incorrectly handled
XML entity expansion. An attacker could use this flaw to cause Ruby to
consume large amounts of memory, resulting in a denial of service.

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/1780-1/"
  );
  script_set_attribute(attribute:"solution", value:"Update the affected packages.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:N/I:N/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:libruby1.8");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libruby1.9.1");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:ruby1.8");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:ruby1.9.1");
  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:11.10");
  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:"vuln_publication_date", value:"2013/04/09");
  script_set_attribute(attribute:"patch_publication_date", value:"2013/03/25");
  script_set_attribute(attribute:"plugin_publication_date", value:"2013/03/26");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"Ubuntu Security Notice (C) 2013-2019 Canonical, Inc. / NASL script (C) 2013-2019 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:"^(10\.04|11\.10|12\.04|12\.10)$", string:release)) audit(AUDIT_OS_NOT, "Ubuntu 10.04 / 11.10 / 12.04 / 12.10", "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:"10.04", pkgname:"libruby1.8", pkgver:"1.8.7.249-2ubuntu0.3")) flag++;
if (ubuntu_check(osver:"10.04", pkgname:"ruby1.8", pkgver:"1.8.7.249-2ubuntu0.3")) flag++;
if (ubuntu_check(osver:"11.10", pkgname:"libruby1.8", pkgver:"1.8.7.352-2ubuntu0.3")) flag++;
if (ubuntu_check(osver:"11.10", pkgname:"ruby1.8", pkgver:"1.8.7.352-2ubuntu0.3")) flag++;
if (ubuntu_check(osver:"12.04", pkgname:"libruby1.8", pkgver:"1.8.7.352-2ubuntu1.2")) flag++;
if (ubuntu_check(osver:"12.04", pkgname:"libruby1.9.1", pkgver:"1.9.3.0-1ubuntu2.6")) flag++;
if (ubuntu_check(osver:"12.04", pkgname:"ruby1.8", pkgver:"1.8.7.352-2ubuntu1.2")) flag++;
if (ubuntu_check(osver:"12.04", pkgname:"ruby1.9.1", pkgver:"1.9.3.0-1ubuntu2.6")) flag++;
if (ubuntu_check(osver:"12.10", pkgname:"libruby1.8", pkgver:"1.8.7.358-4ubuntu0.2")) flag++;
if (ubuntu_check(osver:"12.10", pkgname:"libruby1.9.1", pkgver:"1.9.3.194-1ubuntu1.4")) flag++;
if (ubuntu_check(osver:"12.10", pkgname:"ruby1.8", pkgver:"1.8.7.358-4ubuntu0.2")) flag++;
if (ubuntu_check(osver:"12.10", pkgname:"ruby1.9.1", pkgver:"1.9.3.194-1ubuntu1.4")) 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, "libruby1.8 / libruby1.9.1 / ruby1.8 / ruby1.9.1");
}