Vulnerability Details : CVE-2021-43538
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.
Products affected by CVE-2021-43538
- cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*
- cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*
- cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:*
- cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*
- cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:*
- cpe:2.3:a:mozilla:firefox_esr:*:*:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2021-43538
0.21%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 40 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2021-43538
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
|---|---|---|---|---|---|---|
|
4.3
|
MEDIUM | AV:N/AC:M/Au:N/C:N/I:P/A:N |
8.6
|
2.9
|
NIST | |
|
4.3
|
MEDIUM | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N |
2.8
|
1.4
|
NIST |
CWE ids for CVE-2021-43538
-
The product contains a concurrent code sequence that requires temporary, exclusive access to a shared resource, but a timing window exists in which the shared resource can be modified by another code sequence operating concurrently.Assigned by: nvd@nist.gov (Primary)
References for CVE-2021-43538
-
https://lists.debian.org/debian-lts-announce/2022/01/msg00001.html
[SECURITY] [DLA 2874-1] thunderbird security updateMailing List;Third Party Advisory
-
https://lists.debian.org/debian-lts-announce/2021/12/msg00030.html
[SECURITY] [DLA 2863-1] firefox-esr security updateMailing List;Third Party Advisory
-
https://www.mozilla.org/security/advisories/mfsa2021-53/
Security Vulnerabilities fixed in Firefox ESR 91.4.0 — MozillaVendor Advisory
-
https://www.debian.org/security/2021/dsa-5026
Debian -- Security Information -- DSA-5026-1 firefox-esrThird Party Advisory
-
https://security.gentoo.org/glsa/202202-03
Mozilla Firefox: Multiple vulnerabilities (GLSA 202202-03) — Gentoo securityThird Party Advisory
-
https://bugzilla.mozilla.org/show_bug.cgi?id=1739091
Access DeniedIssue Tracking;Permissions Required;Vendor Advisory
-
https://www.debian.org/security/2022/dsa-5034
Debian -- Security Information -- DSA-5034-1 thunderbirdThird Party Advisory
-
https://security.gentoo.org/glsa/202208-14
Mozilla Thunderbird: Multiple Vulnerabilities (GLSA 202208-14) — Gentoo securityThird Party Advisory
-
https://www.mozilla.org/security/advisories/mfsa2021-54/
Security Vulnerabilities fixed in Thunderbird 91.4.0 — MozillaVendor Advisory
-
https://www.mozilla.org/security/advisories/mfsa2021-52/
Security Vulnerabilities fixed in Firefox 95 — MozillaVendor Advisory
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