Mozilla Firefox < 62.0.3 Multiple Vulnerabilities

High Nessus Network Monitor Plugin ID 700409


The remote host has a web browser installed that is vulnerable to multiple attack vectors.


Versions of Mozilla Firefox prior to 62.0.3 are unpatched for the following vulnerabilities as referenced in the mfsa2018-24 advisory:

- A vulnerability in register allocation in JavaScript can lead to type confusion, allowing for an arbitrary read and write. This leads to remote code execution inside the sandboxed content process when triggered. (CVE-2018-12386)
- A vulnerability where the JavaScript JIT compiler inlines 'Array.prototype.push' with multiple arguments that results in the stack pointer being off by 8 bytes after a bailout. This leaks a memory address to the calling function which can be used as part of an exploit inside the sandboxed content process. (CVE-2018-12387)


Upgrade to Firefox version 62.0.3 or later.

See Also

Plugin Details

Severity: High

ID: 700409

Family: Web Clients

Published: 2019/02/07

Updated: 2019/03/06

Dependencies: 9131

Nessus ID: 117921

Risk Information

Risk Factor: High

CVSS v2.0

Base Score: 8.1

Temporal Score: 5.2

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

Temporal Vector: CVSS2#E:ND/RL:OF/RC:C

CVSS v3.0

Base Score: 5.8

Temporal Score: 4.9

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

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

Vulnerability Information

CPE: cpe:/a:mozilla:firefox

Patch Publication Date: 2018/10/02

Vulnerability Publication Date: 2018/10/02

Reference Information

CVE: CVE-2018-12386, CVE-2018-12387

BID: 105460