Vulnerability Details : CVE-2021-38504
When interacting with an HTML input element's file picker dialog with webkitdirectory set, a use-after-free could have resulted, leading to memory corruption and a potentially exploitable crash. This vulnerability affects Firefox < 94, Thunderbird < 91.3, and Firefox ESR < 91.3.
Vulnerability category: Memory Corruption
Products affected by CVE-2021-38504
- 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-2021-38504
0.41%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 74 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2021-38504
| 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-2021-38504
-
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 Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.Assigned by: nvd@nist.gov (Primary)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-2021-38504
-
https://bugzilla.mozilla.org/show_bug.cgi?id=1730156
Access DeniedIssue Tracking;Permissions Required;Vendor Advisory
-
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
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https://www.debian.org/security/2021/dsa-5026
Debian -- Security Information -- DSA-5026-1 firefox-esrThird Party Advisory
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https://www.mozilla.org/security/advisories/mfsa2021-50/
Security Vulnerabilities fixed in Thunderbird 91.3 — MozillaVendor Advisory
-
https://security.gentoo.org/glsa/202202-03
Mozilla Firefox: Multiple vulnerabilities (GLSA 202202-03) — Gentoo securityThird Party Advisory
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https://www.mozilla.org/security/advisories/mfsa2021-49/
Security Vulnerabilities fixed in Firefox ESR 91.3 — MozillaVendor Advisory
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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
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https://www.mozilla.org/security/advisories/mfsa2021-48/
Security Vulnerabilities fixed in Firefox 94 — MozillaVendor Advisory
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