CVE-2025-0239

  1. OpenCVE
  2. Vulnerabilities (CVE)
  3. CVE-2025-0239
When using Alt-Svc, ALPN did not properly validate certificates when the original server is redirecting to an insecure site. This vulnerability affects Firefox < 134, Firefox ESR < 128.6, Thunderbird < 134, and Thunderbird < 128.6.

4.0 /10

CVSS v3 : MEDIUM

V3 Legend

Vector :

Exploitability : 2.5 / Impact : 1.4

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact LOW

Availability Impact NONE

Scope UNCHANGED

References
Link Resource
https://bugzilla.mozilla.org/show_bug.cgi?id=1929156 Issue Tracking Permissions Required
https://www.mozilla.org/security/advisories/mfsa2025-01/ Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2025-02/ Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2025-04/ Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2025-05/ Vendor Advisory
Configurations

Configuration 1 (hide)

OR cpe:2.3:a:mozilla:firefox:*:*:*:*:esr:*:*:*
cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:*
History

03 Apr 2025, 16:29

Type Values Removed Values Added
References () https://bugzilla.mozilla.org/show_bug.cgi?id=1929156 - () https://bugzilla.mozilla.org/show_bug.cgi?id=1929156 - Issue Tracking, Permissions Required
References () https://www.mozilla.org/security/advisories/mfsa2025-01/ - () https://www.mozilla.org/security/advisories/mfsa2025-01/ - Vendor Advisory
References () https://www.mozilla.org/security/advisories/mfsa2025-02/ - () https://www.mozilla.org/security/advisories/mfsa2025-02/ - Vendor Advisory
References () https://www.mozilla.org/security/advisories/mfsa2025-04/ - () https://www.mozilla.org/security/advisories/mfsa2025-04/ - Vendor Advisory
References () https://www.mozilla.org/security/advisories/mfsa2025-05/ - () https://www.mozilla.org/security/advisories/mfsa2025-05/ - Vendor Advisory
First Time Mozilla
Mozilla firefox
Mozilla thunderbird
CPE cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:firefox:*:*:*:*:esr:*:*:*
cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*

13 Jan 2025, 22:15

Type Values Removed Values Added
Summary (en) When using Alt-Svc, ALPN did not properly validate certificates when the original server is redirecting to an insecure site. This vulnerability affects Firefox < 134, Firefox ESR < 128.6, Thunderbird < 134, and Thunderbird ESR < 128.6. (en) When using Alt-Svc, ALPN did not properly validate certificates when the original server is redirecting to an insecure site. This vulnerability affects Firefox < 134, Firefox ESR < 128.6, Thunderbird < 134, and Thunderbird < 128.6.

09 Jan 2025, 09:15

Type Values Removed Values Added
Summary (en) When using Alt-Svc, ALPN did not properly validate certificates when the original server is redirecting to an insecure site. This vulnerability affects Firefox < 134 and Firefox ESR < 128.6. (en) When using Alt-Svc, ALPN did not properly validate certificates when the original server is redirecting to an insecure site. This vulnerability affects Firefox < 134, Firefox ESR < 128.6, Thunderbird < 134, and Thunderbird ESR < 128.6.
References
  • () https://www.mozilla.org/security/advisories/mfsa2025-04/ -
  • () https://www.mozilla.org/security/advisories/mfsa2025-05/ -

08 Jan 2025, 17:15

Type Values Removed Values Added
Summary
  • (es) Al utilizar Alt-Svc, ALPN no validó correctamente los certificados cuando el servidor original redireccionaba a un sitio inseguro. Esta vulnerabilidad afecta a Firefox &lt; 134 y Firefox ESR &lt; 128.6.
CVSS v2 : unknown
v3 : unknown 		v2 : unknown
v3 : 4.0
CWE CWE-295

07 Jan 2025, 16:15

Type Values Removed Values Added
New CVE
Information

Published : 2025-01-07 16:15

Updated : 2025-04-03 16:29

NVD link : CVE-2025-0239

Mitre link : CVE-2025-0239

CVE.ORG link : CVE-2025-0239

JSON object : View

Products Affected

mozilla

  • firefox
  • thunderbird
CWE
CWE-295

Improper Certificate Validation