CVE-2021-23954
Mozilla: Type confusion when using logical assignment operators in JavaScript switch statements
Severity Score
Exploit Likelihood
Affected Versions
Public Exploits
0Exploited in Wild
-Decision
Descriptions
Using the new logical assignment operators in a JavaScript switch statement could have caused a type confusion, leading to a memory corruption and a potentially exploitable crash. This vulnerability affects Firefox < 85, Thunderbird < 78.7, and Firefox ESR < 78.7.
Usando los nuevos operadores de asignación lógica en una declaración de cambio de JavaScript podría haber causado una confusión de tipos, conllevando a una corrupción de la memoria y un bloqueo potencialmente explotable. Esta vulnerabilidad afecta a Firefox versiones anteriores a 85, Thunderbird versiones anteriores a 78,7 y Firefox ESR versiones anteriores a 78,7
The Mozilla Foundation Security Advisory describes this flaw as:
Using the new logical assignment operators in a JavaScript switch statement could have caused a type confusion, leading to a memory corruption and a potentially exploitable crash.
CVSS Scores
SSVC
- Decision:-
Timeline
- 2021-01-13 CVE Reserved
- 2021-01-28 CVE Published
- 2024-08-03 CVE Updated
- 2024-08-18 EPSS Updated
- ---------- Exploited in Wild
- ---------- KEV Due Date
- ---------- First Exploit
CWE
- CWE-843: Access of Resource Using Incompatible Type ('Type Confusion')
CAPEC
References (5)
| URL | Tag | Source |
|---|
| URL | Date | SRC |
|---|
| URL | Date | SRC |
|---|
| URL | Date | SRC |
|---|---|---|
| https://www.mozilla.org/security/advisories/mfsa2021-03 | 2021-03-03 | |
| https://www.mozilla.org/security/advisories/mfsa2021-04 | 2021-03-03 | |
| https://www.mozilla.org/security/advisories/mfsa2021-05 | 2021-03-03 | |
| https://access.redhat.com/security/cve/CVE-2021-23954 | 2021-02-03 | |
| https://bugzilla.redhat.com/show_bug.cgi?id=1920648 | 2021-02-03 |
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" | < 85.0 Search vendor "Mozilla" for product "Firefox" and version " < 85.0" | - |
Affected
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| Mozilla Search vendor "Mozilla" | Firefox Esr Search vendor "Mozilla" for product "Firefox Esr" | < 78.7 Search vendor "Mozilla" for product "Firefox Esr" and version " < 78.7" | - |
Affected
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| Mozilla Search vendor "Mozilla" | Thunderbird Search vendor "Mozilla" for product "Thunderbird" | < 78.7 Search vendor "Mozilla" for product "Thunderbird" and version " < 78.7" | - |
Affected
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