Race Condition Affecting firefox-esr package, versions <91.4.0esr-1
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Test your applications- Snyk ID SNYK-DEBIANUNSTABLE-FIREFOXESR-2311982
- published 8 Dec 2021
- disclosed 8 Dec 2021
Introduced: 8 Dec 2021
CVE-2021-43538 Open this link in a new tabHow to fix?
Upgrade Debian:unstable
firefox-esr
to version 91.4.0esr-1 or higher.
NVD Description
Note: Versions mentioned in the description apply only to the upstream firefox-esr
package and not the firefox-esr
package as distributed by Debian
.
See How to fix?
for Debian:unstable
relevant fixed versions and status.
By misusing a race in our notification code, an attacker could have forcefully hidden the notification for pages that had received full screen and pointer lock access, which could have been used for spoofing attacks. This vulnerability affects Thunderbird < 91.4.0, Firefox ESR < 91.4.0, and Firefox < 95.
References
- https://security-tracker.debian.org/tracker/CVE-2021-43538
- https://www.mozilla.org/security/advisories/mfsa2021-52/
- https://www.mozilla.org/security/advisories/mfsa2021-54/
- https://www.mozilla.org/security/advisories/mfsa2021-53/
- https://bugzilla.mozilla.org/show_bug.cgi?id=1739091
- https://www.debian.org/security/2021/dsa-5026
- https://lists.debian.org/debian-lts-announce/2021/12/msg00030.html
- https://www.debian.org/security/2022/dsa-5034
- https://lists.debian.org/debian-lts-announce/2022/01/msg00001.html
- https://security.gentoo.org/glsa/202202-03
- https://security.gentoo.org/glsa/202208-14