Ubuntu 14.04 LTS / 16.04 LTS : Python vulnerabilities (USN-3134-1)

#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Ubuntu Security Notice USN-3134-1. 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(95284);
  script_version("3.10");
  script_set_attribute(attribute:"plugin_modification_date", value:"2024/08/27");

  script_cve_id(
    "CVE-2016-0772",
    "CVE-2016-1000110",
    "CVE-2016-5636",
    "CVE-2016-5699"
  );
  script_xref(name:"USN", value:"3134-1");

  script_name(english:"Ubuntu 14.04 LTS / 16.04 LTS : Python vulnerabilities (USN-3134-1)");

  script_set_attribute(attribute:"synopsis", value:
"The remote Ubuntu host is missing one or more security updates.");
  script_set_attribute(attribute:"description", value:
"The remote Ubuntu 14.04 LTS / 16.04 LTS host has packages installed that are affected by multiple vulnerabilities as
referenced in the USN-3134-1 advisory.

    It was discovered that the smtplib library in Python did not return an error when StartTLS fails. A remote
    attacker could possibly use this to expose sensitive information. (CVE-2016-0772)

    Rmi Rampin discovered that Python would not protect CGI applications from contents of the HTTP_PROXY
    environment variable when based on the contents of the Proxy header from HTTP requests. A remote attacker
    could possibly use this to cause a CGI application to redirect outgoing HTTP requests. (CVE-2016-1000110)

    Insu Yun discovered an integer overflow in the zipimporter module in Python that could lead to a heap-
    based overflow. An attacker could use this to craft a special zip file that when read by Python could
    possibly execute arbitrary code. (CVE-2016-5636)

    Guido Vranken discovered that the urllib modules in Python did not properly handle carriage return line
    feed (CRLF) in headers. A remote attacker could use this to craft URLs that inject arbitrary HTTP headers.
    This issue only affected Ubuntu 12.04 LTS and Ubuntu 14.04 LTS. (CVE-2016-5699)

Tenable has extracted the preceding description block directly from the Ubuntu security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version
number.");
  script_set_attribute(attribute:"see_also", value:"https://ubuntu.com/security/notices/USN-3134-1");
  script_set_attribute(attribute:"solution", value:
"Update the affected packages.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:C/I:C/A:C");
  script_set_cvss_temporal_vector("CVSS2#E:POC/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:P/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2016-5636");

  script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"true");
  script_set_attribute(attribute:"in_the_news", value:"true");

  script_set_attribute(attribute:"vuln_publication_date", value:"2016/09/02");
  script_set_attribute(attribute:"patch_publication_date", value:"2016/11/22");
  script_set_attribute(attribute:"plugin_publication_date", value:"2016/11/23");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libpython2.7");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libpython2.7-dev");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libpython2.7-minimal");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libpython2.7-stdlib");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libpython2.7-testsuite");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libpython3.4");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libpython3.4-dev");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libpython3.4-minimal");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libpython3.4-stdlib");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libpython3.4-testsuite");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libpython3.5");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libpython3.5-dev");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libpython3.5-minimal");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libpython3.5-stdlib");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libpython3.5-testsuite");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:python2.7");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:python2.7-dev");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:python2.7-examples");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:python2.7-minimal");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:python3.4");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:python3.4-dev");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:python3.4-examples");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:python3.4-minimal");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:python3.4-venv");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:python3.5");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:python3.5-dev");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:python3.5-examples");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:python3.5-minimal");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:python3.5-venv");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:14.04:-:lts");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:16.04:-:lts");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:idle-python2.7");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:idle-python3.4");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:idle-python3.5");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_family(english:"Ubuntu Local Security Checks");

  script_copyright(english:"Ubuntu Security Notice (C) 2016-2024 Canonical, Inc. / NASL script (C) 2016-2024 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("ssh_get_info.nasl");
  script_require_keys("Host/cpu", "Host/Ubuntu", "Host/Ubuntu/release", "Host/Debian/dpkg-l");

  exit(0);
}

include('debian_package.inc');

if ( ! get_kb_item('Host/local_checks_enabled') ) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
var os_release = get_kb_item('Host/Ubuntu/release');
if ( isnull(os_release) ) audit(AUDIT_OS_NOT, 'Ubuntu');
os_release = chomp(os_release);
if (! ('14.04' >< os_release || '16.04' >< os_release)) audit(AUDIT_OS_NOT, 'Ubuntu 14.04 / 16.04', 'Ubuntu ' + os_release);
if ( ! get_kb_item('Host/Debian/dpkg-l') ) audit(AUDIT_PACKAGE_LIST_MISSING);

var cpu = get_kb_item('Host/cpu');
if (isnull(cpu)) audit(AUDIT_UNKNOWN_ARCH);
if ('x86_64' >!< cpu && cpu !~ "^i[3-6]86$" && 's390' >!< cpu && 'aarch64' >!< cpu) audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, 'Ubuntu', cpu);

var pkgs = [
    {'osver': '14.04', 'pkgname': 'idle-python2.7', 'pkgver': '2.7.6-8ubuntu0.3'},
    {'osver': '14.04', 'pkgname': 'idle-python3.4', 'pkgver': '3.4.3-1ubuntu1~14.04.5'},
    {'osver': '14.04', 'pkgname': 'libpython2.7', 'pkgver': '2.7.6-8ubuntu0.3'},
    {'osver': '14.04', 'pkgname': 'libpython2.7-dev', 'pkgver': '2.7.6-8ubuntu0.3'},
    {'osver': '14.04', 'pkgname': 'libpython2.7-minimal', 'pkgver': '2.7.6-8ubuntu0.3'},
    {'osver': '14.04', 'pkgname': 'libpython2.7-stdlib', 'pkgver': '2.7.6-8ubuntu0.3'},
    {'osver': '14.04', 'pkgname': 'libpython2.7-testsuite', 'pkgver': '2.7.6-8ubuntu0.3'},
    {'osver': '14.04', 'pkgname': 'libpython3.4', 'pkgver': '3.4.3-1ubuntu1~14.04.5'},
    {'osver': '14.04', 'pkgname': 'libpython3.4-dev', 'pkgver': '3.4.3-1ubuntu1~14.04.5'},
    {'osver': '14.04', 'pkgname': 'libpython3.4-minimal', 'pkgver': '3.4.3-1ubuntu1~14.04.5'},
    {'osver': '14.04', 'pkgname': 'libpython3.4-stdlib', 'pkgver': '3.4.3-1ubuntu1~14.04.5'},
    {'osver': '14.04', 'pkgname': 'libpython3.4-testsuite', 'pkgver': '3.4.3-1ubuntu1~14.04.5'},
    {'osver': '14.04', 'pkgname': 'python2.7', 'pkgver': '2.7.6-8ubuntu0.3'},
    {'osver': '14.04', 'pkgname': 'python2.7-dev', 'pkgver': '2.7.6-8ubuntu0.3'},
    {'osver': '14.04', 'pkgname': 'python2.7-examples', 'pkgver': '2.7.6-8ubuntu0.3'},
    {'osver': '14.04', 'pkgname': 'python2.7-minimal', 'pkgver': '2.7.6-8ubuntu0.3'},
    {'osver': '14.04', 'pkgname': 'python3.4', 'pkgver': '3.4.3-1ubuntu1~14.04.5'},
    {'osver': '14.04', 'pkgname': 'python3.4-dev', 'pkgver': '3.4.3-1ubuntu1~14.04.5'},
    {'osver': '14.04', 'pkgname': 'python3.4-examples', 'pkgver': '3.4.3-1ubuntu1~14.04.5'},
    {'osver': '14.04', 'pkgname': 'python3.4-minimal', 'pkgver': '3.4.3-1ubuntu1~14.04.5'},
    {'osver': '14.04', 'pkgname': 'python3.4-venv', 'pkgver': '3.4.3-1ubuntu1~14.04.5'},
    {'osver': '16.04', 'pkgname': 'idle-python2.7', 'pkgver': '2.7.12-1ubuntu0~16.04.1'},
    {'osver': '16.04', 'pkgname': 'idle-python3.5', 'pkgver': '3.5.2-2ubuntu0~16.04.1'},
    {'osver': '16.04', 'pkgname': 'libpython2.7', 'pkgver': '2.7.12-1ubuntu0~16.04.1'},
    {'osver': '16.04', 'pkgname': 'libpython2.7-dev', 'pkgver': '2.7.12-1ubuntu0~16.04.1'},
    {'osver': '16.04', 'pkgname': 'libpython2.7-minimal', 'pkgver': '2.7.12-1ubuntu0~16.04.1'},
    {'osver': '16.04', 'pkgname': 'libpython2.7-stdlib', 'pkgver': '2.7.12-1ubuntu0~16.04.1'},
    {'osver': '16.04', 'pkgname': 'libpython2.7-testsuite', 'pkgver': '2.7.12-1ubuntu0~16.04.1'},
    {'osver': '16.04', 'pkgname': 'libpython3.5', 'pkgver': '3.5.2-2ubuntu0~16.04.1'},
    {'osver': '16.04', 'pkgname': 'libpython3.5-dev', 'pkgver': '3.5.2-2ubuntu0~16.04.1'},
    {'osver': '16.04', 'pkgname': 'libpython3.5-minimal', 'pkgver': '3.5.2-2ubuntu0~16.04.1'},
    {'osver': '16.04', 'pkgname': 'libpython3.5-stdlib', 'pkgver': '3.5.2-2ubuntu0~16.04.1'},
    {'osver': '16.04', 'pkgname': 'libpython3.5-testsuite', 'pkgver': '3.5.2-2ubuntu0~16.04.1'},
    {'osver': '16.04', 'pkgname': 'python2.7', 'pkgver': '2.7.12-1ubuntu0~16.04.1'},
    {'osver': '16.04', 'pkgname': 'python2.7-dev', 'pkgver': '2.7.12-1ubuntu0~16.04.1'},
    {'osver': '16.04', 'pkgname': 'python2.7-examples', 'pkgver': '2.7.12-1ubuntu0~16.04.1'},
    {'osver': '16.04', 'pkgname': 'python2.7-minimal', 'pkgver': '2.7.12-1ubuntu0~16.04.1'},
    {'osver': '16.04', 'pkgname': 'python3.5', 'pkgver': '3.5.2-2ubuntu0~16.04.1'},
    {'osver': '16.04', 'pkgname': 'python3.5-dev', 'pkgver': '3.5.2-2ubuntu0~16.04.1'},
    {'osver': '16.04', 'pkgname': 'python3.5-examples', 'pkgver': '3.5.2-2ubuntu0~16.04.1'},
    {'osver': '16.04', 'pkgname': 'python3.5-minimal', 'pkgver': '3.5.2-2ubuntu0~16.04.1'},
    {'osver': '16.04', 'pkgname': 'python3.5-venv', 'pkgver': '3.5.2-2ubuntu0~16.04.1'}
];

var flag = 0;
foreach var package_array ( pkgs ) {
  var osver = NULL;
  var pkgname = NULL;
  var pkgver = NULL;
  if (!empty_or_null(package_array['osver'])) osver = package_array['osver'];
  if (!empty_or_null(package_array['pkgname'])) pkgname = package_array['pkgname'];
  if (!empty_or_null(package_array['pkgver'])) pkgver = package_array['pkgver'];
  if (osver && pkgname && pkgver) {
    if (ubuntu_check(osver:osver, pkgname:pkgname, pkgver:pkgver)) flag++;
  }
}

if (flag)
{
  var extra = '';
  extra += ubuntu_report_get();
  security_report_v4(
    port       : 0,
    severity   : SECURITY_HOLE,
    extra      : extra
  );
  exit(0);
}
else
{
  var tested = ubuntu_pkg_tests_get();
  if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
  else audit(AUDIT_PACKAGE_NOT_INSTALLED, 'idle-python2.7 / idle-python3.4 / idle-python3.5 / libpython2.7 / etc');
}