Ubuntu 4.10 / 5.04 : gnutls11, gnutls10 vulnerability (USN-126-1)

2006-01-15T00:00:00
ID UBUNTU_USN-126-1.NASL
Type nessus
Reporter Tenable
Modified 2018-07-19T00:00:00

Description

A Denial of Service vulnerability was discovered in the GNU TLS library, which provides common cryptographic algorithms and is used by many applications in Ubuntu. Due to a missing sanity check of the padding length field, specially crafted ciphertext blocks caused an out of bounds memory access which could crash the application. It was not possible to exploit this to execute any attacker specified code.

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.

                                        
                                            #%NASL_MIN_LEVEL 70103

#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Ubuntu Security Notice USN-126-1. 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(20516);
  script_version("1.13");
  script_cvs_date("Date: 2018/07/19 23:44:03");

  script_cve_id("CVE-2005-1431");
  script_xref(name:"USN", value:"126-1");

  script_name(english:"Ubuntu 4.10 / 5.04 : gnutls11, gnutls10 vulnerability (USN-126-1)");
  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:
"A Denial of Service vulnerability was discovered in the GNU TLS
library, which provides common cryptographic algorithms and is used by
many applications in Ubuntu. Due to a missing sanity check of the
padding length field, specially crafted ciphertext blocks caused an
out of bounds memory access which could crash the application. It was
not possible to exploit this to execute any attacker specified code.

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_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:P");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:gnutls-bin");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libgnutls-doc");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libgnutls10");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libgnutls10-dev");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libgnutls11");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libgnutls11-dbg");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libgnutls11-dev");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:4.10");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:5.04");

  script_set_attribute(attribute:"patch_publication_date", value:"2005/05/13");
  script_set_attribute(attribute:"plugin_publication_date", value:"2006/01/15");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"Ubuntu Security Notice (C) 2005-2018 Canonical, Inc. / NASL script (C) 2006-2016 Tenable Network Security, Inc.");
  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:"^(4\.10|5\.04)$", string:release)) audit(AUDIT_OS_NOT, "Ubuntu 4.10 / 5.04", "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:"4.10", pkgname:"gnutls-bin", pkgver:"1.0.4-3ubuntu1.1")) flag++;
if (ubuntu_check(osver:"4.10", pkgname:"libgnutls-doc", pkgver:"1.0.4-3ubuntu1.1")) flag++;
if (ubuntu_check(osver:"4.10", pkgname:"libgnutls10", pkgver:"1.0.4-3ubuntu1.1")) flag++;
if (ubuntu_check(osver:"4.10", pkgname:"libgnutls10-dev", pkgver:"1.0.4-3ubuntu1.1")) flag++;
if (ubuntu_check(osver:"5.04", pkgname:"gnutls-bin", pkgver:"1.0.16-13ubuntu0.1")) flag++;
if (ubuntu_check(osver:"5.04", pkgname:"libgnutls11", pkgver:"1.0.16-13ubuntu0.1")) flag++;
if (ubuntu_check(osver:"5.04", pkgname:"libgnutls11-dbg", pkgver:"1.0.16-13ubuntu0.1")) flag++;
if (ubuntu_check(osver:"5.04", pkgname:"libgnutls11-dev", pkgver:"1.0.16-13ubuntu0.1")) 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, "gnutls-bin / libgnutls-doc / libgnutls10 / libgnutls10-dev / etc");
}