Ubuntu Security Notice USN-6733-1

Ubuntu Security Notice 6733-1 - It was discovered that GnuTLS had a timing side-channel when performing certain ECDSA operations. A remote attacker could possibly use this issue to recover sensitive information. It was discovered that GnuTLS incorrectly handled verifying certain PEM bundles. A remote attacker could possibly use this issue to cause GnuTLS to crash, resulting in a denial of service. This issue only affected Ubuntu 22.04 LTS and Ubuntu 23.10.

attacker channel crash ecdsa gnutls information issue notice operations pem performing recover security security notice sensitive sensitive information side-channel ubuntu usn