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GLSA-202011-07 : Mozilla Firefox: Remote code execution

high Nessus Plugin ID 142844

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Synopsis

The remote Gentoo host is missing one or more security-related patches.

Description

The remote host is affected by the vulnerability described in GLSA-202011-07 (Mozilla Firefox: Remote code execution)

 Invalid assumptions when emitting the the MCallGetProperty opcode in the JavaScript JIT may result in a use-after-free condition.
 Impact :

 A remote attacker could possibly execute arbitrary code with the privileges of the process, or cause a Denial of Service condition.
 Workaround :

 There is no known workaround at this time.

Solution

All Mozilla Firefox users should upgrade to the latest version:
 # emerge --sync # emerge --ask --oneshot --verbose '>=www-client/firefox-82.0.3' All Mozilla Firefox (bin) users should upgrade to the latest version:
 # emerge --sync # emerge --ask --oneshot --verbose '>=www-client/firefox-bin-78.4.1:0/esr78' All Mozilla Firefox (ESR) users should upgrade to the latest version:
 # emerge --sync # emerge --ask --oneshot --verbose '>=www-client/firefox-82.0.3' All Mozilla Firefox (ESR) bin users should upgrade to the latest version:
 # emerge --sync # emerge --ask --oneshot --verbose '>=www-client/firefox-bin-78.4.1:0/esr78'

See Also

https://www.mozilla.org/en-US/security/advisories/mfsa2020-49/

https://security.gentoo.org/glsa/202011-07

Plugin Details

Severity: High

ID: 142844

File Name: gentoo_GLSA-202011-07.nasl

Version: 1.8

Type: local

Published: 11/12/2020

Updated: 3/3/2022

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: High

Score: 7.4

CVSS v2

Risk Factor: High

Base Score: 9.3

Temporal Score: 7.7

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

CVSS Score Source: CVE-2020-26950

CVSS v3

Risk Factor: High

Base Score: 8.8

Temporal Score: 8.2

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

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

Vulnerability Information

CPE: p-cpe:/a:gentoo:linux:firefox, p-cpe:/a:gentoo:linux:firefox-bin, cpe:/o:gentoo:linux

Required KB Items: Host/local_checks_enabled, Host/Gentoo/release, Host/Gentoo/qpkg-list

Exploit Ease: Exploits are available

Patch Publication Date: 11/11/2020

Vulnerability Publication Date: 12/9/2020

Exploitable With

Metasploit (Firefox MCallGetProperty Write Side Effects Use After Free Exploit)

Reference Information

CVE: CVE-2020-26950

GLSA: 202011-07

IAVA: 2020-A-0531-S