Vulnerabilities > CVE-2016-1942 - Improper Input Validation vulnerability in multiple products

#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Ubuntu Security Notice USN-2880-1. 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(88456);
  script_version("1.16");
  script_cvs_date("Date: 2019/09/18 12:31:45");

  script_cve_id("CVE-2016-1930", "CVE-2016-1931", "CVE-2016-1933", "CVE-2016-1935", "CVE-2016-1937", "CVE-2016-1938", "CVE-2016-1939", "CVE-2016-1942", "CVE-2016-1944", "CVE-2016-1945", "CVE-2016-1946", "CVE-2016-1947");
  script_xref(name:"USN", value:"2880-1");

  script_name(english:"Ubuntu 12.04 LTS / 14.04 LTS / 15.04 / 15.10 : firefox vulnerabilities (USN-2880-1)");
  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:
"Bob Clary, Christian Holler, Nils Ohlmeier, Gary Kwong, Jesse
Ruderman, Carsten Book, Randell Jesup, Nicolas Pierron, Eric Rescorla,
Tyson Smith, and Gabor Krizsanits discovered multiple memory safety
issues 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 via application crash, or execute arbitrary code
with the privileges of the user invoking Firefox. (CVE-2016-1930,
CVE-2016-1931)

Gustavo Grieco discovered an out-of-memory crash when loading GIF
images in some circumstances. If a user were tricked in to opening a
specially crafted website, an attacker could exploit this to cause a
denial of service. (CVE-2016-1933)

Aki Helin discovered a buffer overflow when rendering WebGL content in
some circumstances. If a user were tricked in to opening a specially
crafted website, an attacker could potentially exploit this to cause a
denial of service via application crash, or execute arbitrary code
with the privileges of the user invoking Firefox. (CVE-2016-1935)

It was discovered that a delay was missing when focusing the protocol
handler dialog. If a user were tricked in to opening a specially
crafted website, an attacker could potentially exploit this to conduct
clickjacking attacks. (CVE-2016-1937)

Hanno Bock discovered that calculations with mp_div and mp_exptmod in
NSS produce incorrect results in some circumstances, resulting in
cryptographic weaknesses. (CVE-2016-1938)

Nicholas Hurley discovered that Firefox allows for control characters
to be set in cookie names. An attacker could potentially exploit this
to conduct cookie injection attacks on some web servers.
(CVE-2016-1939)

It was discovered that when certain invalid URLs are pasted in to the
addressbar, the addressbar contents may be manipulated to show the
location of arbitrary websites. An attacker could potentially exploit
this to conduct URL spoofing attacks. (CVE-2016-1942)

Ronald Crane discovered three vulnerabilities through code inspection.
If a user were tricked in to opening a specially crafted website, an
attacker could potentially exploit these to cause a denial of service
via application crash, or execute arbitrary code with the privileges
of the user invoking Firefox. (CVE-2016-1944, CVE-2016-1945,
CVE-2016-1946)

Francois Marier discovered that Application Reputation lookups didn't
work correctly, disabling warnings for potentially malicious
downloads. An attacker could potentially exploit this by tricking a
user in to downloading a malicious file. Other parts of the Safe
Browsing feature were unaffected by this. (CVE-2016-1947).

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/2880-1/"
  );
  script_set_attribute(
    attribute:"solution", 
    value:"Update the affected firefox package."
  );
  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:U/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:O/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:firefox");
  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:14.04");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:15.04");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:15.10");

  script_set_attribute(attribute:"vuln_publication_date", value:"2016/01/31");
  script_set_attribute(attribute:"patch_publication_date", value:"2016/01/27");
  script_set_attribute(attribute:"plugin_publication_date", value:"2016/01/28");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"Ubuntu Security Notice (C) 2016-2019 Canonical, Inc. / NASL script (C) 2016-2019 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|14\.04|15\.04|15\.10)$", string:release)) audit(AUDIT_OS_NOT, "Ubuntu 12.04 / 14.04 / 15.04 / 15.10", "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:"firefox", pkgver:"44.0+build3-0ubuntu0.12.04.1")) flag++;
if (ubuntu_check(osver:"14.04", pkgname:"firefox", pkgver:"44.0+build3-0ubuntu0.14.04.1")) flag++;
if (ubuntu_check(osver:"15.04", pkgname:"firefox", pkgver:"44.0+build3-0ubuntu0.15.04.1")) flag++;
if (ubuntu_check(osver:"15.10", pkgname:"firefox", pkgver:"44.0+build3-0ubuntu0.15.10.1")) 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");
}