Ubuntu 12.04 LTS / 12.10 : python3.2 vulnerabilities (USN-1984-1)

2013-10-02T00:00:00
ID UBUNTU_USN-1984-1.NASL
Type nessus
Reporter Ubuntu Security Notice (C) 2013-2019 Canonical, Inc. / NASL script (C) 2013-2019 and is owned by Tenable, Inc. or an Affiliate thereof.
Modified 2020-04-02T00:00:00

Description

Florian Weimer discovered that Python incorrectly handled matching multiple wildcards in ssl certificate hostnames. An attacker could exploit this to cause Python to consume resources, resulting in a denial of service. (CVE-2013-2099)

Ryan Sleevi discovered that Python did not properly handle certificates with NULL characters in the Subject Alternative Name field. An attacker could exploit this to perform a man in the middle attack to view sensitive information or alter encrypted communications. (CVE-2013-4238).

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-1984-1. 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(70268);
  script_version("1.10");
  script_cvs_date("Date: 2019/09/19 12:54:29");

  script_cve_id("CVE-2013-2099", "CVE-2013-4238");
  script_bugtraq_id(59877, 61738);
  script_xref(name:"USN", value:"1984-1");

  script_name(english:"Ubuntu 12.04 LTS / 12.10 : python3.2 vulnerabilities (USN-1984-1)");
  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:
"Florian Weimer discovered that Python incorrectly handled matching
multiple wildcards in ssl certificate hostnames. An attacker could
exploit this to cause Python to consume resources, resulting in a
denial of service. (CVE-2013-2099)

Ryan Sleevi discovered that Python did not properly handle
certificates with NULL characters in the Subject Alternative Name
field. An attacker could exploit this to perform a man in the middle
attack to view sensitive information or alter encrypted
communications. (CVE-2013-4238).

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/1984-1/"
  );
  script_set_attribute(
    attribute:"solution", 
    value:"Update the affected python3.2 and / or python3.2-minimal packages."
  );
  script_set_cvss_base_vector("CVSS2#AV:N/AC:M/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:python3.2");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:python3.2-minimal");
  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:"2013/08/17");
  script_set_attribute(attribute:"patch_publication_date", value:"2013/10/01");
  script_set_attribute(attribute:"plugin_publication_date", value:"2013/10/02");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"Ubuntu Security Notice (C) 2013-2019 Canonical, Inc. / NASL script (C) 2013-2019 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:"^(12\.04|12\.10)$", string:release)) audit(AUDIT_OS_NOT, "Ubuntu 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:"12.04", pkgname:"python3.2", pkgver:"3.2.3-0ubuntu3.5")) flag++;
if (ubuntu_check(osver:"12.04", pkgname:"python3.2-minimal", pkgver:"3.2.3-0ubuntu3.5")) flag++;
if (ubuntu_check(osver:"12.10", pkgname:"python3.2", pkgver:"3.2.3-6ubuntu3.4")) flag++;
if (ubuntu_check(osver:"12.10", pkgname:"python3.2-minimal", pkgver:"3.2.3-6ubuntu3.4")) 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, "python3.2 / python3.2-minimal");
}