[ASA-202105-5] firefox: arbitrary code execution

[Jonas Witschel]

Arch Linux Security Advisory ASA-202105-5
=========================================

Severity: High
Date    : 2021-05-19
CVE-ID  : CVE-2021-29952
Package : firefox
Type    : arbitrary code execution
Remote  : Yes
Link    : https://security.archlinux.org/AVG-1917

Summary
=======

The package firefox before version 88.0.1-1 is vulnerable to arbitrary
code execution.

Resolution
==========

Upgrade to 88.0.1-1.

# pacman -Syu "firefox>=88.0.1-1"

The problem has been fixed upstream in version 88.0.1.

Workaround
==========

None.

Description
===========

A security issue has been found in Firefox before version 88.0.1. When
Web Render components were destructed, a race condition could have
caused undefined behavior, and Mozilla presumes that with enough effort
may have been exploitable to run arbitrary code.

Impact
======

A remote attacker could execute arbitrary code through a crafted HTML
page.

References
==========

https://www.mozilla.org/en-US/security/advisories/mfsa2021-20/#CVE-2021-29952
https://bugzilla.mozilla.org/show_bug.cgi?id=1704227
https://security.archlinux.org/CVE-2021-29952
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