Ubuntu 6.06 LTS / 8.04 LTS / 8.10 / 9.04 : openssl vulnerability (USN-830-1)

2009-09-15T00:00:00
ID UBUNTU_USN-830-1.NASL
Type nessus
Reporter Tenable
Modified 2016-05-27T00:00:00

Description

Dan Kaminsky discovered OpenSSL would still accept certificates with MD2 hash signatures. As a result, an attacker could potentially create a malicious trusted certificate to impersonate another site. This update handles this issue by completely disabling MD2 for certificate validation.

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-830-1. 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(40981);
  script_version("$Revision: 1.10 $");
  script_cvs_date("$Date: 2016/05/27 14:37:19 $");

  script_cve_id("CVE-2009-2409");
  script_xref(name:"USN", value:"830-1");

  script_name(english:"Ubuntu 6.06 LTS / 8.04 LTS / 8.10 / 9.04 : openssl vulnerability (USN-830-1)");
  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:
"Dan Kaminsky discovered OpenSSL would still accept certificates with
MD2 hash signatures. As a result, an attacker could potentially create
a malicious trusted certificate to impersonate another site. This
update handles this issue by completely disabling MD2 for certificate
validation.

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:H/Au:N/C:P/I:P/A:P");
  script_cwe_id(310);

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libssl-dev");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libssl0.9.8");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libssl0.9.8-dbg");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:openssl");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:openssl-doc");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:6.06:-: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:8.10");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:9.04");

  script_set_attribute(attribute:"patch_publication_date", value:"2009/09/14");
  script_set_attribute(attribute:"plugin_publication_date", value:"2009/09/15");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"Ubuntu Security Notice (C) 2009-2016 Canonical, Inc. / NASL script (C) 2009-2016 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:"^(6\.06|8\.04|8\.10|9\.04)$", string:release)) audit(AUDIT_OS_NOT, "Ubuntu 6.06 / 8.04 / 8.10 / 9.04", "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:"6.06", pkgname:"libssl-dev", pkgver:"0.9.8a-7ubuntu0.10")) flag++;
if (ubuntu_check(osver:"6.06", pkgname:"libssl0.9.8", pkgver:"0.9.8a-7ubuntu0.10")) flag++;
if (ubuntu_check(osver:"6.06", pkgname:"libssl0.9.8-dbg", pkgver:"0.9.8a-7ubuntu0.10")) flag++;
if (ubuntu_check(osver:"6.06", pkgname:"openssl", pkgver:"0.9.8a-7ubuntu0.10")) flag++;
if (ubuntu_check(osver:"8.04", pkgname:"libssl-dev", pkgver:"0.9.8g-4ubuntu3.8")) flag++;
if (ubuntu_check(osver:"8.04", pkgname:"libssl0.9.8", pkgver:"0.9.8g-4ubuntu3.8")) flag++;
if (ubuntu_check(osver:"8.04", pkgname:"libssl0.9.8-dbg", pkgver:"0.9.8g-4ubuntu3.8")) flag++;
if (ubuntu_check(osver:"8.04", pkgname:"openssl", pkgver:"0.9.8g-4ubuntu3.8")) flag++;
if (ubuntu_check(osver:"8.04", pkgname:"openssl-doc", pkgver:"0.9.8g-4ubuntu3.8")) flag++;
if (ubuntu_check(osver:"8.10", pkgname:"libssl-dev", pkgver:"0.9.8g-10.1ubuntu2.5")) flag++;
if (ubuntu_check(osver:"8.10", pkgname:"libssl0.9.8", pkgver:"0.9.8g-10.1ubuntu2.5")) flag++;
if (ubuntu_check(osver:"8.10", pkgname:"libssl0.9.8-dbg", pkgver:"0.9.8g-10.1ubuntu2.5")) flag++;
if (ubuntu_check(osver:"8.10", pkgname:"openssl", pkgver:"0.9.8g-10.1ubuntu2.5")) flag++;
if (ubuntu_check(osver:"8.10", pkgname:"openssl-doc", pkgver:"0.9.8g-10.1ubuntu2.5")) flag++;
if (ubuntu_check(osver:"9.04", pkgname:"libssl-dev", pkgver:"0.9.8g-15ubuntu3.3")) flag++;
if (ubuntu_check(osver:"9.04", pkgname:"libssl0.9.8", pkgver:"0.9.8g-15ubuntu3.3")) flag++;
if (ubuntu_check(osver:"9.04", pkgname:"libssl0.9.8-dbg", pkgver:"0.9.8g-15ubuntu3.3")) flag++;
if (ubuntu_check(osver:"9.04", pkgname:"openssl", pkgver:"0.9.8g-15ubuntu3.3")) flag++;
if (ubuntu_check(osver:"9.04", pkgname:"openssl-doc", pkgver:"0.9.8g-15ubuntu3.3")) 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, "libssl-dev / libssl0.9.8 / libssl0.9.8-dbg / openssl / openssl-doc");
}