SecuriTricks - CVE-2025-3032

Description

Leaking of file descriptors from the fork server to web content processes could allow for privilege escalation attacks. This vulnerability affects Firefox < 137 and Thunderbird < 137.

Product(s) Impacted

Vendor	Product	Versions
Mozilla	Firefox Thunderbird	<137 <137

Weaknesses

Common security weaknesses mapped to this vulnerability.

CWE-403

Exposure of File Descriptor to Unintended Control Sphere ('File Descriptor Leak')

A process does not close sensitive file descriptors before invoking a child process, which allows the child to perform unauthorized I/O operations using those descriptors.

*CPE(s)

Affected systems and software identified for this CVE.

Type	Vendor	Product	Version	Update	Edition	Language	Software Edition	Target Software	Target Hardware	Other Information
a	mozilla	firefox	<137	/	/	/	/	/	/	/
a	mozilla	thunderbird	<137	/	/	/	/	/	/	/

References

https://bugzilla.mozilla.org/show_bug.cgi?id=1949987

https://www.mozilla.org/security/advisories/mfsa2025-20/

https://www.mozilla.org/security/advisories/mfsa2025-23/

CVSS Score

7.4 / 10

CVSS Data - 3.1

Attack Vector: NETWORK
Attack Complexity: HIGH
Privileges Required: NONE
Scope: UNCHANGED
Confidentiality Impact: HIGH
Integrity Impact: HIGH
Availability Impact: NONE

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N

View Vector String

Timeline

Published: April 1, 2025, 1:15 p.m.
Last Modified: April 1, 2025, 8:26 p.m.

Status : Awaiting Analysis

CVE has been recently published to the CVE List and has been received by the NVD.

More info

Source

security@mozilla.org

CVE-2025-3032