Ubuntu 11.10 / 12.04 LTS / 12.10 : python-keyring vulnerabilities (USN-1634-1)

#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Ubuntu Security Notice USN-1634-1. 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(62983);
  script_version("1.9");
  script_cvs_date("Date: 2019/09/19 12:54:28");

  script_cve_id("CVE-2012-4571");
  script_bugtraq_id(55815);
  script_xref(name:"USN", value:"1634-1");

  script_name(english:"Ubuntu 11.10 / 12.04 LTS / 12.10 : python-keyring vulnerabilities (USN-1634-1)");
  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:
"Dwayne Litzenberger discovered that Python Keyring's
CryptedFileKeyring file format used weak cryptography. A local
attacker may use this issue to brute-force CryptedFileKeyring keyring
files. This issue only affected Ubuntu 11.10 and Ubuntu 12.04 LTS.
(CVE-2012-4571)

It was discovered that Python Keyring created keyring files with
insecure permissions. A local attacker could use this issue to access
keyring files belonging to other users.

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/1634-1/"
  );
  script_set_attribute(
    attribute:"solution", 
    value:"Update the affected python-keyring and / or python3-keyring packages."
  );
  script_set_cvss_base_vector("CVSS2#AV:L/AC:L/Au:N/C:P/I:N/A:N");
  script_set_cvss_temporal_vector("CVSS2#E:ND/RL:OF/RC:ND");
  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-keyring");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:python3-keyring");
  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:"2012/11/30");
  script_set_attribute(attribute:"patch_publication_date", value:"2012/11/20");
  script_set_attribute(attribute:"plugin_publication_date", value:"2012/11/21");
  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:"^(11\.10|12\.04|12\.10)$", string:release)) audit(AUDIT_OS_NOT, "Ubuntu 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:"11.10", pkgname:"python-keyring", pkgver:"0.9.2-0ubuntu0.11.10.2")) flag++;
if (ubuntu_check(osver:"12.04", pkgname:"python-keyring", pkgver:"0.9.2-0ubuntu0.12.04.2")) flag++;
if (ubuntu_check(osver:"12.04", pkgname:"python3-keyring", pkgver:"0.9.2-0ubuntu0.12.04.2")) flag++;
if (ubuntu_check(osver:"12.10", pkgname:"python-keyring", pkgver:"0.9.2-1ubuntu0.2")) flag++;
if (ubuntu_check(osver:"12.10", pkgname:"python3-keyring", pkgver:"0.9.2-1ubuntu0.2")) flag++;

if (flag)
{
  security_report_v4(
    port       : 0,
    severity   : SECURITY_NOTE,
    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-keyring / python3-keyring");
}