- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Gentoo Linux Security Advisory GLSA 202101-04 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - https://security.gentoo.org/ - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Severity: Normal Title: Mozilla Firefox: Remote code execution Date: January 10, 2021 Bugs: #764161 ID: 202101-04 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 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. 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 Description =========== A use-after-free bug was discovered in Mozilla Firefox's handling of SCTP. 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 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 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. License ======= Copyright 2021 Gentoo Foundation, Inc; referenced text belongs to its owner(s). The contents of this document are licensed under the Creative Commons - Attribution / Share Alike license. https://creativecommons.org/licenses/by-sa/2.5