A vulnerability was found in GnuTLS. The response times to malformed ciphertexts in RSA-PSK ClientKeyExchange differ from the response times of ciphertexts with correct PKCS#1 v1.5 padding. This issue may allow a remote attacker to perform a timing side-channel attack in the RSA-PSK key exchange, potentially leading to the leakage of sensitive data. CVE-2024-0553 is designated as an incomplete resolution for CVE-2023-5981.
https://lists.gnupg.org/pipermail/gnutls-help/2024-January/004841.html
https://gitlab.com/gnutls/gnutls/-/issues/1522
https://bugzilla.redhat.com/show_bug.cgi?id=2258412
https://access.redhat.com/security/cve/CVE-2024-0553
https://access.redhat.com/errata/RHSA-2024:2094
https://access.redhat.com/errata/RHSA-2024:1383
https://access.redhat.com/errata/RHSA-2024:1108
https://access.redhat.com/errata/RHSA-2024:1082
https://access.redhat.com/errata/RHSA-2024:0796