GLSA 202011-07: Mozilla Firefox: Remote code execution

http://security.gentoo.org/

Severity:	normal
Title:	Mozilla Firefox: Remote code execution
Date:	11/11/2020
Bugs:	#753773
ID:	202011-07

Synopsis

A use-after-free in Mozilla Firefox might allow remote attacker(s) to execute arbitrary code.

Background

Mozilla Firefox is a popular open-source web browser from the Mozilla project.

Affected packages

Package	Vulnerable	Unaffected	Architecture(s)
www-client/firefox-bin	< 78.4.1	>= 82.0.3	All supported architectures
www-client/firefox	< 82.0.3	>= 82.0.3	All supported architectures

Description

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.

Resolution

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"

References

Availability

This GLSA and any updates to it are available for viewing at the Gentoo Security Website: http://security.gentoo.org/glsa/glsa-202011-07.xml

Concerns?

Security is a primary focus of Gentoo Linux and ensuring the confidentiality and security of our users machines is of utmost importance to us. Any security concerns should be addressed to security@gentoo.org or alternatively, you may file a bug at https://bugs.gentoo.org.