Bug#1067464: gnutls28: CVE-2024-28834

[Salvatore Bonaccorso]

Source: gnutls28
Version: 3.8.3-1
Severity: important
Tags: security upstream
Forwarded: https://gitlab.com/gnutls/gnutls/-/issues/1516
X-Debbugs-Cc: carnil at debian.org, Debian Security Team <team at security.debian.org>

Hi,

The following vulnerability was published for gnutls28.

CVE-2024-28834[0]:
| 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.


If you fix the vulnerability please also make sure to include the
CVE (Common Vulnerabilities & Exposures) id in your changelog entry.

For further information see:

[0] https://security-tracker.debian.org/tracker/CVE-2024-28834
    https://www.cve.org/CVERecord?id=CVE-2024-28834
[1] https://gitlab.com/gnutls/gnutls/-/issues/1516
[2] https://lists.gnupg.org/pipermail/gnutls-help/2024-March/004845.html
[3] https://www.gnutls.org/security-new.html#GNUTLS-SA-2023-12-04

Please adjust the affected versions in the BTS as needed.

Regards,
Salvatore