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Mozilla Firefox < 51.0

🗓️ 18 Nov 2025 00:00:00Reported by TenableType 
nessus
 nessus
🔗 www.tenable.com👁 3 Views

Firefox on macOS before 51.0 is affected by CVEs: use-after-free, memory corruption, and ASLR bypass.

Related
Refs
Code
#%NASL_MIN_LEVEL 80900
## 
# (C) Tenable, Inc.
#                                  
# The descriptive text and package checks in this plugin were
# extracted from Mozilla Foundation Security Advisory mfsa2017-01.
# The text itself is copyright (C) Mozilla Foundation.
## 

include('compat.inc');

if (description)
{
  script_id(275691);
  script_version("1.1");
  script_set_attribute(attribute:"plugin_modification_date", value:"2025/11/18");

  script_cve_id(
    "CVE-2017-5373",
    "CVE-2017-5374",
    "CVE-2017-5375",
    "CVE-2017-5376",
    "CVE-2017-5377",
    "CVE-2017-5378",
    "CVE-2017-5379",
    "CVE-2017-5380",
    "CVE-2017-5381",
    "CVE-2017-5382",
    "CVE-2017-5383",
    "CVE-2017-5384",
    "CVE-2017-5385",
    "CVE-2017-5386",
    "CVE-2017-5387",
    "CVE-2017-5388",
    "CVE-2017-5389",
    "CVE-2017-5390",
    "CVE-2017-5391",
    "CVE-2017-5392",
    "CVE-2017-5393",
    "CVE-2017-5394",
    "CVE-2017-5395",
    "CVE-2017-5396"
  );
  script_xref(name:"IAVA", value:"2017-A-0026-S");

  script_name(english:"Mozilla Firefox < 51.0");

  script_set_attribute(attribute:"synopsis", value:
"A web browser installed on the remote macOS or Mac OS X host is affected by multiple vulnerabilities.");
  script_set_attribute(attribute:"description", value:
"The version of Firefox installed on the remote macOS or Mac OS X host is prior to 51.0. It is, therefore, affected by
multiple vulnerabilities as referenced in the mfsa2017-01 advisory.

  - A use-after-free vulnerability in the Media Decoder when working with media files when some events are
    fired after the media elements are freed from memory. (CVE-2017-5396)

  - JIT code allocation can allow for a bypass of ASLR and DEP protections leading to potential memory
    corruption attacks. (CVE-2017-5375)

  - Use-after-free while manipulating XSL in XSLT documents (CVE-2017-5376)

  - A memory corruption vulnerability in Skia that can occur when using transforms to make gradients,
    resulting in a potentially exploitable crash. (CVE-2017-5377)

  - Hashed codes of JavaScript objects are shared between pages. This allows for pointer leaks because an
    objects address can be discovered through hash codes, and also allows for data leakage of an objects
    content using these hash codes. (CVE-2017-5378)

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://www.mozilla.org/en-US/security/advisories/mfsa2017-01/");
  script_set_attribute(attribute:"solution", value:
"Upgrade to Mozilla Firefox version 51.0 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:H/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:H/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2017-5396");

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

  script_set_attribute(attribute:"vuln_publication_date", value:"2017/01/24");
  script_set_attribute(attribute:"patch_publication_date", value:"2017/01/24");
  script_set_attribute(attribute:"plugin_publication_date", value:"2025/11/18");

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

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

  script_copyright(english:"This script is Copyright (C) 2025 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("macosx_firefox_installed.nasl");
  script_require_keys("installed_sw/Mozilla Firefox");

  exit(0);
}

include('vdf.inc');

# @tvdl-content-verify-only
var vuln_data = {
  "metadata": {
    "spec_version": "1.0"
  },
  "requires": [
    {
      "scope": "target",
      "match": {
        "os": "macos"
      }
    }
  ],
  "checks": [
    {
      "product": {
        "name": "Mozilla Firefox",
        "type": "app"
      },
      "check_algorithm": "default",
      "constraints": [
        {
          "fixed_version": "51.0"
        }
      ]
    }
  ]
};

var vdf_result = vdf::check_and_report(vuln_data:vuln_data, severity:SECURITY_HOLE);
vdf::handle_check_and_report_errors(vdf_result:vdf_result);

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18 Nov 2025 00:00Current
7.6High risk
Vulners AI Score7.6
CVSS 27.5
CVSS 39.8
EPSS0.58393
3