CVE-2006-4790: GNU Gnutls

Medium severity, CVSS 5.0. EPSS: 2.5% chance of exploitation in the next 30 days.

verify.c in GnuTLS before 1.4.4, when using an RSA key with exponent 3, does not properly handle excess data in the digestAlgorithm.parameters field when generating a hash, which allows remote attackers to forge a PKCS #1 v1.5 signature that is signed by that RSA key and prevents GnuTLS from correctly verifying X.509 and other certificates that use PKCS, a variant of CVE-2006-4339.

Affected products

• GNU Gnutls: version 1.0.17 only; version 1.0.18 only; version 1.0.19 only; version 1.0.20 only; version 1.0.21 only; version 1.0.22 only; …

Published 2006-09-14. Last modified 2026-06-16.