Ubuntu 8.04 LTS / 10.04 LTS / 11.04 / 11.10 / 12.04 LTS : expat vulnerabilities (USN-1527-1)

#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Ubuntu Security Notice USN-1527-1. 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(61485);
  script_version("1.11");
  script_cvs_date("Date: 2019/09/19 12:54:28");

  script_cve_id("CVE-2012-0876", "CVE-2012-1148");
  script_bugtraq_id(52379);
  script_xref(name:"USN", value:"1527-1");

  script_name(english:"Ubuntu 8.04 LTS / 10.04 LTS / 11.04 / 11.10 / 12.04 LTS : expat vulnerabilities (USN-1527-1)");
  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 Expat computed hash values without restricting
the ability to trigger hash collisions predictably. If a user or
application linked against Expat were tricked into opening a crafted
XML file, an attacker could cause a denial of service by consuming
excessive CPU resources. (CVE-2012-0876)

Tim Boddy discovered that Expat did not properly handle memory
reallocation when processing XML files. If a user or application
linked against Expat were tricked into opening a crafted XML file, an
attacker could cause a denial of service by consuming excessive memory
resources. This issue only affected Ubuntu 8.04 LTS, 10.04 LTS, 11.04
and 11.10. (CVE-2012-1148).

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/1527-1/"
  );
  script_set_attribute(
    attribute:"solution", 
    value:
"Update the affected lib64expat1, libexpat1 and / or libexpat1-udeb
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:lib64expat1");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libexpat1");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libexpat1-udeb");
  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:11.04");
  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:8.04:-:lts");

  script_set_attribute(attribute:"vuln_publication_date", value:"2012/07/03");
  script_set_attribute(attribute:"patch_publication_date", value:"2012/08/09");
  script_set_attribute(attribute:"plugin_publication_date", value:"2012/08/10");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"Ubuntu Security Notice (C) 2012-2019 Canonical, Inc. / NASL script (C) 2012-2019 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|10\.04|11\.04|11\.10|12\.04)$", string:release)) audit(AUDIT_OS_NOT, "Ubuntu 8.04 / 10.04 / 11.04 / 11.10 / 12.04", "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:"lib64expat1", pkgver:"2.0.1-0ubuntu1.2")) flag++;
if (ubuntu_check(osver:"8.04", pkgname:"libexpat1", pkgver:"2.0.1-0ubuntu1.2")) flag++;
if (ubuntu_check(osver:"8.04", pkgname:"libexpat1-udeb", pkgver:"2.0.1-0ubuntu1.2")) flag++;
if (ubuntu_check(osver:"10.04", pkgname:"lib64expat1", pkgver:"2.0.1-7ubuntu1.1")) flag++;
if (ubuntu_check(osver:"10.04", pkgname:"libexpat1", pkgver:"2.0.1-7ubuntu1.1")) flag++;
if (ubuntu_check(osver:"10.04", pkgname:"libexpat1-udeb", pkgver:"2.0.1-7ubuntu1.1")) flag++;
if (ubuntu_check(osver:"11.04", pkgname:"lib64expat1", pkgver:"2.0.1-7ubuntu3.11.04.1")) flag++;
if (ubuntu_check(osver:"11.04", pkgname:"libexpat1", pkgver:"2.0.1-7ubuntu3.11.04.1")) flag++;
if (ubuntu_check(osver:"11.04", pkgname:"libexpat1-udeb", pkgver:"2.0.1-7ubuntu3.11.04.1")) flag++;
if (ubuntu_check(osver:"11.10", pkgname:"lib64expat1", pkgver:"2.0.1-7ubuntu3.11.10.1")) flag++;
if (ubuntu_check(osver:"11.10", pkgname:"libexpat1", pkgver:"2.0.1-7ubuntu3.11.10.1")) flag++;
if (ubuntu_check(osver:"11.10", pkgname:"libexpat1-udeb", pkgver:"2.0.1-7ubuntu3.11.10.1")) flag++;
if (ubuntu_check(osver:"12.04", pkgname:"lib64expat1", pkgver:"2.0.1-7.2ubuntu1.1")) flag++;
if (ubuntu_check(osver:"12.04", pkgname:"libexpat1", pkgver:"2.0.1-7.2ubuntu1.1")) flag++;
if (ubuntu_check(osver:"12.04", pkgname:"libexpat1-udeb", pkgver:"2.0.1-7.2ubuntu1.1")) 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, "lib64expat1 / libexpat1 / libexpat1-udeb");
}