Ubuntu 12.10 / 13.04 : keystone vulnerabilities (USN-1875-1)

2013-06-14T00:00:00
ID UBUNTU_USN-1875-1.NASL
Type nessus
Reporter Tenable
Modified 2019-01-02T00:00:00

Description

Eoghan Glynn and Alex Meade discovered that Keystone did not properly perform expiry checks for the PKI tokens used in Keystone. If Keystone were setup to use PKI tokens, a previously authenticated user could continue to use a PKI token for longer than intended. This issue only affected Ubuntu 12.10 which does not use PKI tokens by default. (CVE-2013-2104)

Jose Castro Leon discovered that Keystone did not properly authenticate users when using the LDAP backend. An attacker could obtain valid tokens and impersonate other users by supplying an empty password. By default, Ubuntu does not use the LDAP backend. (CVE-2013-2157).

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-1875-1. 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(66893);
  script_version("1.9");
  script_cvs_date("Date: 2019/01/02 16:37:56");

  script_cve_id("CVE-2013-2104", "CVE-2013-2157");
  script_bugtraq_id(60193, 60545);
  script_xref(name:"USN", value:"1875-1");

  script_name(english:"Ubuntu 12.10 / 13.04 : keystone vulnerabilities (USN-1875-1)");
  script_summary(english:"Checks dpkg output for updated package.");

  script_set_attribute(
    attribute:"synopsis", 
    value:"The remote Ubuntu host is missing a security-related patch."
  );
  script_set_attribute(
    attribute:"description", 
    value:
"Eoghan Glynn and Alex Meade discovered that Keystone did not properly
perform expiry checks for the PKI tokens used in Keystone. If Keystone
were setup to use PKI tokens, a previously authenticated user could
continue to use a PKI token for longer than intended. This issue only
affected Ubuntu 12.10 which does not use PKI tokens by default.
(CVE-2013-2104)

Jose Castro Leon discovered that Keystone did not properly
authenticate users when using the LDAP backend. An attacker could
obtain valid tokens and impersonate other users by supplying an empty
password. By default, Ubuntu does not use the LDAP backend.
(CVE-2013-2157).

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/1875-1/"
  );
  script_set_attribute(
    attribute:"solution", 
    value:"Update the affected python-keystone package."
  );
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:S/C:N/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:python-keystone");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:12.10");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:13.04");

  script_set_attribute(attribute:"patch_publication_date", value:"2013/06/13");
  script_set_attribute(attribute:"plugin_publication_date", value:"2013/06/14");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"Ubuntu Security Notice (C) 2013-2019 Canonical, Inc. / NASL script (C) 2018 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 (! ereg(pattern:"^(12\.10|13\.04)$", string:release)) audit(AUDIT_OS_NOT, "Ubuntu 12.10 / 13.04", "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:"12.10", pkgname:"python-keystone", pkgver:"2012.2.4-0ubuntu3.1")) flag++;
if (ubuntu_check(osver:"13.04", pkgname:"python-keystone", pkgver:"1:2013.1.1-0ubuntu2.1")) 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, "python-keystone");
}