CVE-2025-1942

  1. OpenCVE
  2. Vulnerabilities (CVE)
  3. CVE-2025-1942
When String.toUpperCase() caused a string to get longer it was possible for uninitialized memory to be incorporated into the result string This vulnerability affects Firefox < 136 and Thunderbird < 136.

9.8 /10

CVSS v3 : CRITICAL

V3 Legend

Vector :

Exploitability : 3.9 / Impact : 5.9

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References
Link Resource
https://bugzilla.mozilla.org/show_bug.cgi?id=1947139 Issue Tracking
https://www.mozilla.org/security/advisories/mfsa2025-14/ Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2025-17/ Vendor Advisory
Configurations

Configuration 1 (hide)

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

28 Mar 2025, 20:10

Type Values Removed Values Added
First Time Mozilla firefox
Mozilla
Mozilla thunderbird
References () https://bugzilla.mozilla.org/show_bug.cgi?id=1947139 - () https://bugzilla.mozilla.org/show_bug.cgi?id=1947139 - Issue Tracking
References () https://www.mozilla.org/security/advisories/mfsa2025-14/ - () https://www.mozilla.org/security/advisories/mfsa2025-14/ - Vendor Advisory
References () https://www.mozilla.org/security/advisories/mfsa2025-17/ - () https://www.mozilla.org/security/advisories/mfsa2025-17/ - Vendor Advisory
CPE cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:*

25 Mar 2025, 15:15

Type Values Removed Values Added
CWE CWE-908
CVSS v2 : unknown
v3 : unknown 		v2 : unknown
v3 : 9.8

12 Mar 2025, 17:15

Type Values Removed Values Added
Summary
  • (es) Cuando String.toUpperCase() hacía que una cadena se hiciera más larga, era posible que la memoria no inicializada se incorporara a la cadena de resultado. Esta vulnerabilidad afecta a Firefox &lt; 136 y Thunderbird &lt; 136.
CVSS v2 : unknown
v3 : 6.5 		v2 : unknown
v3 : unknown
CWE CWE-908

05 Mar 2025, 00:15

Type Values Removed Values Added
Summary (en) When String.toUpperCase() caused a string to get longer it was possible for uninitialized memory to be incorporated into the result string This vulnerability affects Firefox < 136. (en) When String.toUpperCase() caused a string to get longer it was possible for uninitialized memory to be incorporated into the result string This vulnerability affects Firefox < 136 and Thunderbird < 136.
References
  • () https://www.mozilla.org/security/advisories/mfsa2025-17/ -

04 Mar 2025, 16:15

Type Values Removed Values Added
CVSS v2 : unknown
v3 : unknown 		v2 : unknown
v3 : 6.5
CWE CWE-908

04 Mar 2025, 14:15

Type Values Removed Values Added
New CVE
Information

Published : 2025-03-04 14:15

Updated : 2025-03-28 20:10

NVD link : CVE-2025-1942

Mitre link : CVE-2025-1942

CVE.ORG link : CVE-2025-1942

JSON object : View

Products Affected

mozilla

  • firefox
  • thunderbird
CWE
CWE-908

Use of Uninitialized Resource