CVE-2021-23995
Mozilla: Use-after-free in Responsive Design Mode
Severity Score
8.8
*CVSS v3.1
Exploit Likelihood
*EPSS
Affected Versions
*CPE
Public Exploits
0
*Multiple Sources
Exploited in Wild
-
*KEV
Decision
-
*SSVC
Descriptions
When Responsive Design Mode was enabled, it used references to objects that were previously freed. We presume that with enough effort this could have been exploited to run arbitrary code. This vulnerability affects Firefox ESR < 78.10, Thunderbird < 78.10, and Firefox < 88.
Cuando se habilitó el Modo de Diseño Responsivo, se usaron referencias a objetos que fueron liberados previamente. Presumimos que con suficiente esfuerzo esto podría haber sido explotado para ejecutar código arbitrario. Esta vulnerabilidad afecta a Firefox ESR versiones anteriores a 78.10, Thunderbird versiones anteriores a 78.10 y Firefox versiones anteriores a 88
*Credits:
N/A
CVSS Scores
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability
Attack Vector
Attack Complexity
Authentication
Confidentiality
Integrity
Availability
* Common Vulnerability Scoring System
SSVC
- Decision:-
Exploitation
Automatable
Tech. Impact
* Organization's Worst-case Scenario
Timeline
- 2021-01-13 CVE Reserved
- 2021-04-26 CVE Published
- 2024-03-09 EPSS Updated
- 2024-08-03 CVE Updated
- ---------- Exploited in Wild
- ---------- KEV Due Date
- ---------- First Exploit
CWE
- CWE-416: Use After Free
- CWE-672: Operation on a Resource after Expiration or Release
CAPEC
References (5)
| URL | Tag | Source |
|---|
| URL | Date | SRC |
|---|
| URL | Date | SRC |
|---|
| URL | Date | SRC |
|---|---|---|
| https://www.mozilla.org/security/advisories/mfsa2021-14 | 2021-07-02 | |
| https://www.mozilla.org/security/advisories/mfsa2021-15 | 2021-07-02 | |
| https://www.mozilla.org/security/advisories/mfsa2021-16 | 2021-07-02 | |
| https://access.redhat.com/security/cve/CVE-2021-23995 | 2021-04-26 | |
| https://bugzilla.redhat.com/show_bug.cgi?id=1951365 | 2021-04-26 |
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" | < 88.0 Search vendor "Mozilla" for product "Firefox" and version " < 88.0" | - |
Affected
| ||||||
| Mozilla Search vendor "Mozilla" | Firefox Esr Search vendor "Mozilla" for product "Firefox Esr" | < 78.10 Search vendor "Mozilla" for product "Firefox Esr" and version " < 78.10" | - |
Affected
| ||||||
| Mozilla Search vendor "Mozilla" | Thunderbird Search vendor "Mozilla" for product "Thunderbird" | < 78.10 Search vendor "Mozilla" for product "Thunderbird" and version " < 78.10" | - |
Affected
| ||||||