update: gnutls

[dongsupark]

Name: gnutls
CVEs: CVE-2024-28834, CVE-2024-28835
CVSSs: 5.3, 5.0
Action Needed: update to >= 3.8.4

Summary:

• CVE-2024-28834: A flaw was found in GnuTLS. The Minerva attack is a cryptographic vulnerability that exploits deterministic behavior in systems like GnuTLS, leading to side-channel leaks. In specific scenarios, such as when using the GNUTLS_PRIVKEY_FLAG_REPRODUCIBLE flag, it can result in a noticeable step in nonce size from 513 to 512 bits, exposing a potential timing side-channel.
• CVE-2024-28835: A flaw has been discovered in GnuTLS where an application crash can be induced when attempting to verify a specially crafted .pem bundle using the "certtool --verify-chain" command.

See also https://lists.gnupg.org/pipermail/gnutls-help/2024-March/004845.html.

refmap.gentoo: https://bugs.gentoo.org/927557