Detections
Analytics

Mozilla Firefox ESR < 78.10.1

medium Nessus Plugin ID 149255

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Synopsis

A web browser installed on the remote Windows host is affected by a vulnerability.

Description

The version of Firefox ESR installed on the remote Windows host is prior to 78.10.1. It is, therefore, affected by a vulnerability as referenced in the mfsa2021-18 advisory.

 - The Mozilla Maintenance Service granted SERVICESTART access to BUILTIN|Users which, in a domain network, grants normal remote users access to start or stop the service. This could be used to prevent the browser update service from operating (if an attacker spammed the 'Stop' command); but also exposed attack surface in the maintenance service.Note: This issue only affected Windows operating systems older than Win 10 build 1709. Other operating systems are unaffected. (CVE-2021-29951)

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

Solution

Upgrade to Mozilla Firefox ESR version 78.10.1 or later.

See Also

https://www.mozilla.org/en-US/security/advisories/mfsa2021-18/

Plugin Details

Severity: Medium

ID: 149255

File Name: mozilla_firefox_78_10_1_esr.nasl

Version: 1.6

Type: local

Agent: windows

Family: Windows

Published: 5/4/2021

Updated: 7/1/2021

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

Risk Information

VPR

Risk Factor: Low

Score: 3.3

CVSS v2

Risk Factor: Medium

Base Score: 6.4

Temporal Score: 5

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

CVSS Score Source: CVE-2021-29951

CVSS v3

Risk Factor: Medium

Base Score: 6.5

Temporal Score: 5.9

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

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

Vulnerability Information

CPE: cpe:/a:mozilla:firefox_esr

Required KB Items: Mozilla/Firefox/Version

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 5/4/2021

Vulnerability Publication Date: 5/4/2021

Reference Information

CVE: CVE-2021-29951

IAVA: 2021-A-0214-S