Vulnerabilities > CVE-2016-9896 - Use After Free vulnerability in Mozilla Firefox

#
# (C) Tenable Network Security, Inc.
#

include("compat.inc");

if (description)
{
  script_id(95884);
  script_version("1.6");
  script_cvs_date("Date: 2019/11/13");

  script_cve_id(
    "CVE-2016-9080",
    "CVE-2016-9893",
    "CVE-2016-9894",
    "CVE-2016-9895",
    "CVE-2016-9896",
    "CVE-2016-9897",
    "CVE-2016-9898",
    "CVE-2016-9899",
    "CVE-2016-9900",
    "CVE-2016-9901",
    "CVE-2016-9902",
    "CVE-2016-9903",
    "CVE-2016-9904"
  );
  script_bugtraq_id(94883, 94885);
  script_xref(name:"MFSA", value:"2016-94");

  script_name(english:"Mozilla Firefox < 50.1 Multiple Vulnerabilities (macOS)");
  script_summary(english:"Checks the version of Firefox.");

  script_set_attribute(attribute:"synopsis", value:
"The remote macOS or Mac OS X host contains a web browser that is
affected by multiple vulnerabilities.");
  script_set_attribute(attribute:"description", value:
"The version of Mozilla Firefox installed on the remote macOS or Mac
OS X host is prior to 50.1. It is, therefore, affected by the
following vulnerabilities :

  - Multiple memory corruption issues exists when handling
    style contexts, regular expressions, and clamped
    gradients that allow an unauthenticated, remote attacker
    to cause a denial of service condition or the execution
    of arbitrary code. (CVE-2016-9080)

  - Multiple memory corruption issues exists, such as when
    handling document state changes or HTML5 content, or
    else due to dereferencing already freed memory or
    improper validation of user-supplied input. An
    unauthenticated, remote attacker can exploit these to
    cause a denial of service condition or the execution of
    arbitrary code. (CVE-2016-9893)

  - A buffer overflow condition exists in SkiaGl, within the
    GrResourceProvider::createBuffer() function in file
    gfx/skia/skia/src/gpu/GrResourceProvider.cpp, due to a
    GrGLBuffer being truncated during allocation. An
    unauthenticated, remote attacker can exploit this to
    cause a denial of service condition or the execution of
    arbitrary code. (CVE-2016-9894)

  - A security bypass vulnerability exists due to event
    handlers for marquee elements being executed despite a
    Content Security Policy (CSP) that disallowed inline
    JavaScript. An unauthenticated, remote attacker can
    exploit this to impact integrity. (CVE-2016-9895)

  - A use-after-free error exists within WebVR when handling
    the navigator object. An unauthenticated, remote
    attacker can exploit this to dereference already freed
    memory, resulting in the execution of arbitrary code.
    (CVE-2016-9896)

  - A memory corruption issue exists in libGLES when WebGL
    functions use a vector constructor with a varying array
    within libGLES. An unauthenticated, remote attacker can
    exploit this to cause a denial of service condition or
    the execution of arbitrary code. (CVE-2016-9897)

  - A use-after-free error exists in Editor, specifically
    within file editor/libeditor/HTMLEditor.cpp, when
    handling DOM subtrees. An unauthenticated, remote
    attacker can exploit this to cause a denial of service
    condition or the execution of arbitrary code.
    (CVE-2016-9898)

  - A use-after-free error exists in the
    nsNodeUtils::CloneAndAdopt() function within file
    dom/base/nsNodeUtils.cpp, while manipulating DOM events
    and removing audio elements, due to improper handling of
    failing node adoption. An unauthenticated, remote
    attacker can exploit this to cause a denial of service
    condition or the execution of arbitrary code.
    (CVE-2016-9899)

  - A security bypass vulnerability exists in the
    nsDataDocumentContentPolicy::ShouldLoad() function
    within file dom/base/nsDataDocumentContentPolicy.cpp
    that allows external resources to be inappropriately
    loaded by SVG images by utilizing 'data:' URLs. An
    unauthenticated, remote attacker can exploit this to
    disclose sensitive cross-domain information.
    (CVE-2016-9900)

  - A flaw exists due to improper sanitization of HTML tags
    received from the Pocket server. An unauthenticated,
    remote attacker can exploit this to run JavaScript code
    in the about:pocket-saved (unprivileged) page, giving it
    access to Pocket's messaging API through HTML injection.
    (CVE-2016-9901)

  - A flaw exists in the Pocket toolbar button, specifically
    in browser/extensions/pocket/content/main.js, due to
    improper verification of the origin of events fired from
    its own pages. An unauthenticated, remote attacker can
    exploit this to inject content and commands from other
    origins into the Pocket context. Note that this issue
    does not affect users with e10s enabled. (CVE-2016-9902)

  - A universal cross-site scripting (XSS) vulnerability
    exists in the Add-ons SDK, specifically within files
    addon-sdk/source/lib/sdk/ui/frame/view.html and
    addon-sdk/source/lib/sdk/ui/frame/view.js, due to
    improper validation of input before returning it to
    users. An unauthenticated, remote attacker can exploit
    this, via a specially crafted request, to execute
    arbitrary script code in a user's browser session.
    (CVE-2016-9903)

  - An information disclosure vulnerability exists that
    allows an unauthenticated, remote attacker to determine
    whether an atom is used by another compartment or zone
    in specific contexts, by utilizing a JavaScript Map/Set
    timing attack. (CVE-2016-9904)");
  script_set_attribute(attribute:"see_also", value:"https://www.mozilla.org/en-US/security/advisories/mfsa2016-94/");
  script_set_attribute(attribute:"solution", value:
"Upgrade to Mozilla Firefox version 50.1 or later.");
  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:F/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:F/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2016-9901");

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

  script_set_attribute(attribute:"vuln_publication_date", value:"2016/10/21");
  script_set_attribute(attribute:"patch_publication_date", value:"2016/12/13");
  script_set_attribute(attribute:"plugin_publication_date", value:"2016/12/15");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:mozilla:firefox");
  script_end_attributes();

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

  script_copyright(english:"This script is Copyright (C) 2016-2019 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("macosx_firefox_installed.nasl");
  script_require_keys("MacOSX/Firefox/Installed");

  exit(0);
}

include("mozilla_version.inc");

kb_base = "MacOSX/Firefox";
get_kb_item_or_exit(kb_base+"/Installed");

version = get_kb_item_or_exit(kb_base+"/Version", exit_code:1);
path = get_kb_item_or_exit(kb_base+"/Path", exit_code:1);

if (get_kb_item(kb_base + '/is_esr')) exit(0, 'The Mozilla Firefox installation is in the ESR branch.');

mozilla_check_version(product:'firefox', version:version, path:path, esr:FALSE, fix:'50.1', severity:SECURITY_HOLE);