Vulnerability Details : CVE-2021-38496
During operations on MessageTasks, a task may have been removed while it was still scheduled, resulting in memory corruption and a potentially exploitable crash. This vulnerability affects Thunderbird < 78.15, Thunderbird < 91.2, Firefox ESR < 91.2, Firefox ESR < 78.15, and Firefox < 93.
Vulnerability category: Memory Corruption
Products affected by CVE-2021-38496
- 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:firefox:*:*:*:*:*:*:*:*
- cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:*
- cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:*
- cpe:2.3:a:mozilla:firefox_esr:*:*:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2021-38496
0.74%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 71 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2021-38496
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
|---|---|---|---|---|---|---|
|
6.8
|
MEDIUM | AV:N/AC:M/Au:N/C:P/I:P/A:P |
8.6
|
6.4
|
NIST | |
|
8.8
|
HIGH | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H |
2.8
|
5.9
|
NIST |
CWE ids for CVE-2021-38496
-
The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.Assigned by: nvd@nist.gov (Primary)
References for CVE-2021-38496
-
https://lists.debian.org/debian-lts-announce/2022/01/msg00001.html
[SECURITY] [DLA 2874-1] thunderbird security updateMailing List;Third Party Advisory
-
https://www.mozilla.org/security/advisories/mfsa2021-44/
Security Vulnerabilities fixed in Firefox ESR 78.15 — MozillaVendor Advisory
-
https://www.mozilla.org/security/advisories/mfsa2021-46/
404: Page Not FoundBroken Link
-
https://bugzilla.mozilla.org/show_bug.cgi?id=1725335
Access DeniedIssue Tracking;Permissions Required;Vendor Advisory
-
https://www.mozilla.org/security/advisories/mfsa2021-43/
Security Vulnerabilities fixed in Firefox 93 — MozillaVendor Advisory
-
https://www.mozilla.org/security/advisories/mfsa2021-47/
Security Vulnerabilities fixed in Thunderbird 91.2 — MozillaVendor Advisory
-
https://www.debian.org/security/2022/dsa-5034
Debian -- Security Information -- DSA-5034-1 thunderbirdIssue Tracking;Third Party Advisory
-
https://www.mozilla.org/security/advisories/mfsa2021-45/
Security Vulnerabilities fixed in Firefox ESR 91.2 — MozillaVendor Advisory
Jump to