CVE-2021-43535
Mozilla: Use-after-free in HTTP2 Session object
Severity Score
Exploit Likelihood
Affected Versions
Public Exploits
0Exploited in Wild
-Decision
Descriptions
A use-after-free could have occured when an HTTP2 session object was released on a different thread, leading to memory corruption and a potentially exploitable crash. This vulnerability affects Firefox < 93, Thunderbird < 91.3, and Firefox ESR < 91.3.
Podría haberse producido un uso de memoria previamente liberada cuando un objeto de sesión HTTP2 se liberaba en un hilo diferente, conllevando a una corrupción de memoria y un fallo potencialmente explotable. Esta vulnerabilidad afecta a Firefox versiones anteriores a 93, Thunderbird versiones anteriores a 91.3 y Firefox ESR versiones anteriores a 91.3
The Mozilla Foundation Security Advisory describes this flaw as:
A use-after-free could have occured when an HTTP2 session object was released on a different thread, leading to memory corruption and a potentially exploitable crash.
CVSS Scores
SSVC
- Decision:-
Timeline
- 2021-11-08 CVE Reserved
- 2021-12-08 CVE Published
- 2024-08-04 CVE Updated
- 2024-08-23 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/2021/12/msg00030.html | Mailing List |
|
| https://lists.debian.org/debian-lts-announce/2022/01/msg00001.html | Mailing List |
|
| URL | Date | SRC |
|---|
| URL | Date | SRC |
|---|
| URL | Date | SRC |
|---|---|---|
| https://www.debian.org/security/2021/dsa-5026 | 2022-03-17 | |
| 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/mfsa2021-49 | 2022-03-17 | |
| https://www.mozilla.org/security/advisories/mfsa2021-50 | 2022-03-17 | |
| https://access.redhat.com/security/cve/CVE-2021-43535 | 2021-11-10 | |
| https://bugzilla.redhat.com/show_bug.cgi?id=2019626 | 2021-11-10 |
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
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| Mozilla Search vendor "Mozilla" | Firefox Esr Search vendor "Mozilla" for product "Firefox Esr" | < 91.3.0 Search vendor "Mozilla" for product "Firefox Esr" and version " < 91.3.0" | - |
Affected
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| Mozilla Search vendor "Mozilla" | Thunderbird Search vendor "Mozilla" for product "Thunderbird" | < 91.3.0 Search vendor "Mozilla" for product "Thunderbird" and version " < 91.3.0" | - |
Affected
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| 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
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| 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
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| 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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