Detections
Analytics

Mozilla Firefox < 63.0

critical Nessus Plugin ID 275622

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Synopsis

A web browser installed on the remote macOS or Mac OS X host is affected by multiple vulnerabilities.

Description

The version of Firefox installed on the remote macOS or Mac OS X host is prior to 63.0. It is, therefore, affected by multiple vulnerabilities as referenced in the mfsa2018-26 advisory.

 - When manipulating user events in nested loops while opening a document through script, it is possible to trigger a potentially exploitable crash due to poor event handling. (CVE-2018-12392)

 - During HTTP Live Stream playback on Firefox for Android, audio data can be accessed across origins in violation of security policies. Because the problem is in the underlying Android service, this issue is addressed by treating all HLS streams as cross-origin and opaque to access. Note: this issue only affects Firefox for Android. Desktop versions of Firefox are unaffected. (CVE-2018-12391)

 - A potential vulnerability was found in 32-bit builds where an integer overflow during the conversion of scripts to an internal UTF-16 representation could result in allocating a buffer too small for the conversion. This leads to a possible out-of-bounds write. Note: 64-bit builds are not vulnerable to this issue. (CVE-2018-12393)

 - By rewriting the <code>Host</code> request headers using the <code>webRequest</code> API, a WebExtension can bypass domain restrictions through domain fronting. This would allow access to domains that share a host that are otherwise restricted. (CVE-2018-12395)

 - A vulnerability where a WebExtension can run content scripts in disallowed contexts following navigation or other events. This allows for potential privilege escalation by the WebExtension on sites where content scripts should not be run. (CVE-2018-12396)

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

Solution

Upgrade to Mozilla Firefox version 63.0 or later.

See Also

https://www.mozilla.org/en-US/security/advisories/mfsa2018-26/

Plugin Details

Severity: Critical

ID: 275622

File Name: macos_firefox_63_0.nasl

Version: 1.1

Type: local

Agent: macosx

Published: 11/18/2025

Updated: 11/18/2025

Supported Sensors: Frictionless Assessment Agent, Frictionless Assessment AWS, Frictionless Assessment Azure, Nessus Agent, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 6.0

CVSS v2

Risk Factor: High

Base Score: 9.3

Temporal Score: 6.9

Vector: CVSS2#AV:N/AC:M/Au:N/C:C/I:C/A:C

CVSS Score Source: CVE-2018-12391

CVSS v3

Risk Factor: Critical

Base Score: 9.8

Temporal Score: 8.5

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

CVSS Score Source: CVE-2018-12392

Vulnerability Information

CPE: cpe:/a:mozilla:firefox

Required KB Items: installed_sw/Mozilla Firefox

Exploit Ease: No known exploits are available

Patch Publication Date: 10/23/2018

Vulnerability Publication Date: 10/23/2018

Reference Information

CVE: CVE-2018-12388, CVE-2018-12390, CVE-2018-12391, CVE-2018-12392, CVE-2018-12393, CVE-2018-12395, CVE-2018-12396, CVE-2018-12397, CVE-2018-12398, CVE-2018-12399, CVE-2018-12400, CVE-2018-12401, CVE-2018-12402, CVE-2018-12403

IAVA: 2018-A-0348-S