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Gentoo: 202101-04 Critical: Firefox Remote Code Execution Advisory

gentoo
Calendar Grey January 10, 2021
Dist Gentoo Esm H88
The Gentoo Security Advisory GLSA 202101-04 addresses a vital vulnerability in Firefox that can lead to remote code execution. Users are strongly urged to apply updates without delay.
A use-after-free in Mozilla Firefox's SCTP handling may allow remote code execution.

Summary

A use-after-free bug was discovered in Mozilla Firefox's handling of SCTP.

Topics%20covered

Topics Covered

security advisory high severity security issue gentoo critical software update remote code execution firefox Gentoo Linux Mozilla Firefox sctp handling

Resolution

All Firefox ESR users should upgrade to the latest version: # emerge --sync # emerge --ask --oneshot -v ">=www-client/firefox-78.6.1:0/esr78"
All Firefox ESR binary users should upgrade to the latest version:
# emerge --sync # emerge --ask --oneshot -v ">=www-client/firefox-bin-78.6.1:0/esr78"
All Firefox users should upgrade to the latest version:
# emerge --sync # emerge --ask --oneshot --verbose ">=www-client/firefox-84.0.2"
All Firefox binary users should upgrade to the latest version:
# emerge --sync # emerge --ask --oneshot --verbose ">=www-client/firefox-bin-84.0.2"

References

[ 1 ] CVE-2020-16044 https://nvd.nist.gov/vuln/detail/CVE-2020-16044 [ 2 ] MFSA-2021-01 https://www.mozilla.org/en-US/security/advisories/mfsa2021-01/

Availability

This GLSA and any updates to it are available for viewing at the Gentoo Security Website: https://security.gentoo.org/glsa/202101-04
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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.

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Severity: Normal
Title: Mozilla Firefox: Remote code execution
Date: January 10, 2021
Bugs: #764161
ID: 202101-04

Topics%20covered

Topics Covered

security advisory high severity security issue gentoo critical software update remote code execution firefox Gentoo Linux Mozilla Firefox sctp handling

Synopsis

A use-after-free in Mozilla Firefox's SCTP handling may allow remote code execution.

Background

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

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Affected Packages

------------------------------------------------------------------- Package / Vulnerable / Unaffected ------------------------------------------------------------------- 1 www-client/firefox < 84.0.2 >= 78.6.1:0/esr78 >= 84.0.2 2 www-client/firefox-bin < 84.0.2 >= 78.6.1:0/esr78 >= 84.0.2 ------------------------------------------------------------------- 2 affected packages

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.

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