[ASA-202101-5] firefox: arbitrary code execution

[Morten Linderud]

Arch Linux Security Advisory ASA-202101-5
=========================================

Severity: Critical
Date    : 2021-01-08
CVE-ID  : CVE-2020-16044
Package : firefox
Type    : arbitrary code execution
Remote  : Yes
Link    : https://security.archlinux.org/AVG-1413

Summary
=======

The package firefox before version 84.0.2-1 is vulnerable to arbitrary
code execution.

Resolution
==========

Upgrade to 84.0.2-1.

# pacman -Syu "firefox>=84.0.2-1"

The problem has been fixed upstream in version 84.0.2.

Workaround
==========

None.

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

A security issue was found in Firefox before 84.0.2. A malicious peer
could have modified a COOKIE-ECHO chunk in a SCTP packet in a way that
potentially resulted in a use-after-free. Mozilla presumes that with
enough effort it could have been exploited to run arbitrary code.

Impact
======

A remote attacker might be able to execute arbitrary code via a crafted
SCTP packet.

References
==========

https://www.mozilla.org/en-US/security/advisories/mfsa2021-01/#CVE-2020-16044
https://bugzilla.mozilla.org/show_bug.cgi?id=1683964
https://hg.mozilla.org/mozilla-central/rev/08ba03dc8d4420e04e7c77fee3013e68180e6ead
https://hg.mozilla.org/mozilla-central/rev/8c09f4813fc7e8f44605b6092262199bff15cdd7
https://hg.mozilla.org/mozilla-central/rev/5991645a87d2abf289686d09d943229c9e3e54b5
https://security.archlinux.org/CVE-2020-16044
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