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Gentoo: GLSA-202011-07 Normal: Mozilla Firefox Remote Code Execution

gentoo
Calendar Grey November 10, 2020
Dist Gentoo Esm H88
Google Chrome encounters a buffer overflow flaw that allows unauthorized access to system resources; ensure you upgrade to the current release immediately.
A use-after-free in Mozilla Firefox might allow remote attacker(s) to execute arbitrary code.

Summary

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

Topics%20covered

Topics Covered

security advisory code execution remote code execution firefox gentoo linux

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 -v ">=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 -v ">=www-client/firefox-bin-78.4.1:0/esr78"

References

[ 1 ] CVE-2020-26950 https://nvd.nist.gov/vuln/detail/CVE-2020-26950 [ 2 ] MFSA-2020-49 https://www.mozilla.org/en-US/security/advisories/mfsa2020-49/

Availability

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

Severity: Normal
Title: Mozilla Firefox: Remote code execution
Date: November 11, 2020
Bugs: #753773
ID: 202011-07

Topics%20covered

Topics Covered

security advisory code execution remote code execution firefox gentoo linux

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.

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Affected Packages

------------------------------------------------------------------- Package / Vulnerable / Unaffected ------------------------------------------------------------------- 1 www-client/firefox < 82.0.3 >= 78.4.1:0/esr78 >= 82.0.3 2 www-client/firefox-bin < 78.4.1 >= 78.4.1:0/esr78 >= 82.0.3 ------------------------------------------------------------------- 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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