CVE-2021-38496
Mozilla: Use-after-free in MessageTask
Severity Score
Exploit Likelihood
Affected Versions
Public Exploits
0Exploited in Wild
-Decision
Descriptions
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.
Durante las operaciones en MessageTasks, una tarea puede haber sido eliminada mientras todavía estaba programada, resultando en una corrupción de memoria y un bloqueo potencialmente explotable. Esta vulnerabilidad afecta a Thunderbird versiones anteriores a 78.15, Thunderbird versiones anteriores a 91.2, Firefox ESR versiones anteriores a 91.2, Firefox ESR versiones anteriores a 78.15 y Firefox versiones anteriores a 93
Multiple security issues were discovered in Thunderbird, which could result in the execution of arbitrary code, spoofing, information disclosure, downgrade attacks on SMTP STARTTLS connections or misleading display of OpenPGP/MIME signatures.
CVSS Scores
SSVC
- Decision:-
Timeline
- 2021-08-10 CVE Reserved
- 2021-10-11 CVE Published
- 2024-08-04 CVE Updated
- 2025-04-12 EPSS Updated
- ---------- Exploited in Wild
- ---------- KEV Due Date
- ---------- First Exploit
CWE
- CWE-416: Use After Free
CAPEC
References (9)
| URL | Tag | Source |
|---|---|---|
| https://lists.debian.org/debian-lts-announce/2022/01/msg00001.html | Mailing List |
|
| https://www.mozilla.org/security/advisories/mfsa2021-46 | Broken Link |
| URL | Date | SRC |
|---|
| URL | Date | SRC |
|---|
| URL | Date | SRC |
|---|---|---|
| https://www.debian.org/security/2022/dsa-5034 | 2022-03-17 | |
| https://www.mozilla.org/security/advisories/mfsa2021-43 | 2022-03-17 | |
| https://www.mozilla.org/security/advisories/mfsa2021-44 | 2022-03-17 | |
| https://www.mozilla.org/security/advisories/mfsa2021-45 | 2022-03-17 | |
| https://www.mozilla.org/security/advisories/mfsa2021-47 | 2022-03-17 | |
| https://access.redhat.com/security/cve/CVE-2021-38496 | 2021-10-13 | |
| https://bugzilla.redhat.com/show_bug.cgi?id=2011097 | 2021-10-13 |
Affected Vendors, Products, and Versions
| Vendor | Product | Version | Other | Status | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Vendor | Product | Version | Other | Status | <-- --> | Vendor | Product | Version | Other | Status |
| Mozilla Search vendor "Mozilla" | Firefox Search vendor "Mozilla" for product "Firefox" | < 93.0 Search vendor "Mozilla" for product "Firefox" and version " < 93.0" | - |
Affected
| ||||||
| Mozilla Search vendor "Mozilla" | Firefox Esr Search vendor "Mozilla" for product "Firefox Esr" | < 78.15 Search vendor "Mozilla" for product "Firefox Esr" and version " < 78.15" | - |
Affected
| ||||||
| Mozilla Search vendor "Mozilla" | Firefox Esr Search vendor "Mozilla" for product "Firefox Esr" | >= 91.0 < 91.2 Search vendor "Mozilla" for product "Firefox Esr" and version " >= 91.0 < 91.2" | - |
Affected
| ||||||
| Mozilla Search vendor "Mozilla" | Thunderbird Search vendor "Mozilla" for product "Thunderbird" | < 78.15 Search vendor "Mozilla" for product "Thunderbird" and version " < 78.15" | - |
Affected
| ||||||
| Mozilla Search vendor "Mozilla" | Thunderbird Search vendor "Mozilla" for product "Thunderbird" | >= 91.0 < 91.2 Search vendor "Mozilla" for product "Thunderbird" and version " >= 91.0 < 91.2" | - |
Affected
| ||||||
| Debian Search vendor "Debian" | Debian Linux Search vendor "Debian" for product "Debian Linux" | 9.0 Search vendor "Debian" for product "Debian Linux" and version "9.0" | - |
Affected
| ||||||
| Debian Search vendor "Debian" | Debian Linux Search vendor "Debian" for product "Debian Linux" | 10.0 Search vendor "Debian" for product "Debian Linux" and version "10.0" | - |
Affected
| ||||||
| Debian Search vendor "Debian" | Debian Linux Search vendor "Debian" for product "Debian Linux" | 11.0 Search vendor "Debian" for product "Debian Linux" and version "11.0" | - |
Affected
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