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CVE-2021-43538

Date: December 8, 2021

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.

Severity Score

Related Resources (16)

https://security.gentoo.org/glsa/202208-14
https://www.debian.org/security/2021/dsa-5026
https://security.gentoo.org/glsa/202202-03
https://access.redhat.com/security/cve/CVE-2021-43538
https://www.mozilla.org/security/advisories/mfsa2021-54/
https://lists.debian.org/debian-lts-announce/2021/12/msg00030.html
https://security.alpinelinux.org/vuln/CVE-2021-43538
https://nvd.nist.gov/vuln/detail/CVE-2021-43538
https://people.canonical.com/~ubuntu-security/cve/CVE-2021-43538
https://lists.debian.org/debian-lts-announce/2022/01/msg00001.html
https://security-tracker.debian.org/tracker/CVE-2021-43538
https://www.mozilla.org/security/advisories/mfsa2021-53/
https://www.mozilla.org/security/advisories/mfsa2021-52/
https://bugzilla.mozilla.org/show_bug.cgi?id=1739091
https://www.debian.org/security/2022/dsa-5034
https://www.mend.io/vulnerability-database/CVE-2021-43538

Severity Score

Weakness Type (CWE)

Race Conditions

CWE-362

CVSS v3.1

Base Score:
Attack Vector (AV): NETWORK
Attack Complexity (AC): LOW
Privileges Required (PR): NONE
User Interaction (UI): REQUIRED
Scope (S): UNCHANGED
Confidentiality (C): NONE
Integrity (I): LOW
Availability (A): NONE

CVSS v2

Base Score:
Access Vector (AV): NETWORK
Access Complexity (AC): MEDIUM
Authentication (AU): NONE
Confidentiality (C): NONE
Integrity (I): PARTIAL
Availability (A): NONE
Additional information:

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