CVE-2021-23999
Mozilla: Blob URLs may have been granted additional privileges
Severity Score
8.8
*CVSS v3.1
Exploit Likelihood
*EPSS
Affected Versions
*CPE
Public Exploits
1
*Multiple Sources
Exploited in Wild
-
*KEV
Decision
-
*SSVC
Descriptions
If a Blob URL was loaded through some unusual user interaction, it could have been loaded by the System Principal and granted additional privileges that should not be granted to web content. This vulnerability affects Firefox ESR < 78.10, Thunderbird < 78.10, and Firefox < 88.
Si una URL Blob se cargó mediante alguna interacción inusual del usuario, podría haber sido cargada por el Principal del Sistema y conceder privilegios adicionales que no deberían concederse al contenido web. 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
- 2024-08-03 First Exploit
- ---------- Exploited in Wild
- ---------- KEV Due Date
CWE
- CWE-269: Improper Privilege Management
- CWE-281: Improper Preservation of Permissions
- CWE-697: Incorrect Comparison
CAPEC
References (6)
| URL | Tag | Source |
|---|
| URL | Date | SRC |
|---|---|---|
| https://bugzilla.mozilla.org/show_bug.cgi?id=1691153 | 2024-08-03 |
| URL | Date | SRC |
|---|
| URL | Date | SRC |
|---|---|---|
| https://www.mozilla.org/security/advisories/mfsa2021-14 | 2022-04-26 | |
| https://www.mozilla.org/security/advisories/mfsa2021-15 | 2022-04-26 | |
| https://www.mozilla.org/security/advisories/mfsa2021-16 | 2022-04-26 | |
| https://access.redhat.com/security/cve/CVE-2021-23999 | 2021-04-26 | |
| https://bugzilla.redhat.com/show_bug.cgi?id=1951368 | 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
| ||||||