Vulnerabilities > CVE-2019-11714 - Improper Input Validation vulnerability in Mozilla Firefox

#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Ubuntu Security Notice USN-4054-2. 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(127093);
  script_version("1.3");
  script_cvs_date("Date: 2020/01/06");

  script_cve_id("CVE-2019-11709", "CVE-2019-11710", "CVE-2019-11711", "CVE-2019-11712", "CVE-2019-11713", "CVE-2019-11714", "CVE-2019-11715", "CVE-2019-11716", "CVE-2019-11717", "CVE-2019-11718", "CVE-2019-11719", "CVE-2019-11720", "CVE-2019-11721", "CVE-2019-11723", "CVE-2019-11724", "CVE-2019-11725", "CVE-2019-11727", "CVE-2019-11728", "CVE-2019-11729", "CVE-2019-11730", "CVE-2019-9811");
  script_xref(name:"USN", value:"4054-2");

  script_name(english:"Ubuntu 16.04 LTS / 18.04 LTS / 19.04 : firefox regressions (USN-4054-2)");
  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:
"USN-4054-1 fixed vulnerabilities in Firefox. The update introduced
various minor regressions. This update fixes the problems.

We apologize for the inconvenience.

Original advisory details :

A sandbox escape was discovered in Firefox. If a user were tricked in
to installing a malicious language pack, an attacker could exploit
this to gain additional privileges. (CVE-2019-9811)

Multiple security issues were discovered in Firefox. If a
user were tricked in to opening a specially crafted website,
an attacker could potentially exploit these to cause a
denial of service, obtain sensitive information, bypass same
origin restrictions, conduct cross-site scripting (XSS)
attacks, conduct cross-site request forgery (CSRF) attacks,
spoof origin attributes, spoof the addressbar contents,
bypass safebrowsing protections, or execute arbitrary code.
(CVE-2019-11709, CVE-2019-11710, CVE-2019-11711,
CVE-2019-11712, CVE-2019-11713, CVE-2019-11714,
CVE-2019-11715, CVE-2019-11716, CVE-2019-11717,
CVE-2019-11718, CVE-2019-11719, CVE-2019-11720,
CVE-2019-11721, CVE-2019-11723, CVE-2019-11724,
CVE-2019-11725, CVE-2019-11727, CVE-2019-11728,
CVE-2019-11729)

It was discovered that Firefox treats all files in a
directory as same origin. If a user were tricked in to
downloading a specially crafted HTML file, an attacker could
potentially exploit this to obtain sensitive information
from local files. (CVE-2019-11730).

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/4054-2/"
  );
  script_set_attribute(
    attribute:"solution", 
    value:"Update the affected firefox package."
  );
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:P");
  script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:L");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2019-11716");
  script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:firefox");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:16.04");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:18.04:-:lts");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:19.04");

  script_set_attribute(attribute:"vuln_publication_date", value:"2019/07/23");
  script_set_attribute(attribute:"patch_publication_date", value:"2019/07/25");
  script_set_attribute(attribute:"plugin_publication_date", value:"2019/07/26");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"Ubuntu Security Notice (C) 2019-2020 Canonical, Inc. / NASL script (C) 2019-2020 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:"^(16\.04|18\.04|19\.04)$", string:release)) audit(AUDIT_OS_NOT, "Ubuntu 16.04 / 18.04 / 19.04", "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:"16.04", pkgname:"firefox", pkgver:"68.0.1+build1-0ubuntu0.16.04.1")) flag++;
if (ubuntu_check(osver:"18.04", pkgname:"firefox", pkgver:"68.0.1+build1-0ubuntu0.18.04.1")) flag++;
if (ubuntu_check(osver:"19.04", pkgname:"firefox", pkgver:"68.0.1+build1-0ubuntu0.19.04.1")) flag++;

if (flag)
{
  security_report_v4(
    port       : 0,
    severity   : SECURITY_HOLE,
    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, "firefox");
}