SB2025040426 - Signature verification bypass in GnuPG
Published: April 4, 2025
Security Bulletin ID
SB2025040426
Severity
Medium
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Data manipulation
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 security vulnerability.
1) Input validation error (CVE-ID: CVE-2025-30258)
The vulnerability allows a remote attacker to disable signature verification.
The vulnerability exists due to an error when handling subkey data. A remote attacker can trick the victim into importing a specially crafted certificate with subkey data that lacks a valid backsig or that has incorrect usage flags and disable signature verification for other signing keys.
Remediation
Install update from vendor's website.