CVE-2023-0361: Debian Linux

High severity, CVSS 7.4. EPSS: 1.4% chance of exploitation in the next 30 days.

A timing side-channel in the handling of RSA ClientKeyExchange messages was discovered in GnuTLS. This side-channel can be sufficient to recover the key encrypted in the RSA ciphertext across a network in a Bleichenbacher style attack. To achieve a successful decryption the attacker would need to send a large amount of specially crafted messages to the vulnerable server. By recovering the secret from the ClientKeyExchange message, the attacker would be able to decrypt the application data exchanged over that connection.

Affected products

• Debian Debian Linux: version 10.0 only
• Fedoraproject Fedora: version 36 only; version 37 only; version 38 only
• GNU Gnutls: version 3.6.8-11.el8_2 only
• Netapp Active Iq Unified Manager: affected versions not specified
• Netapp Converged Systems Advisor Agent: affected versions not specified
• Netapp Ontap Select Deploy Administration Utility: affected versions not specified
• Red Hat Enterprise Linux: version 8.0 only; version 9.0 only

Published 2023-02-15. Last modified 2026-06-17.