A gnutls28 security update has been released for Debian GNU/Linux 10 to address a flaw in the DTLS protocol implementation in GnuTLS.

DSA 4652-1: gnutls28 security update

- -------------------------------------------------------------------------
Debian Security Advisory DSA-4652-1 security@debian.org
  https://www.debian.org/security/ Salvatore Bonaccorso
April 04, 2020   https://www.debian.org/security/faq
- -------------------------------------------------------------------------

Package : gnutls28
CVE ID : CVE-2020-11501
Debian Bug : 955556

A flaw was reported in the DTLS protocol implementation in GnuTLS, a
library implementing the TLS and SSL protocols. The DTLS client would
not contribute any randomness to the DTLS negotiation, breaking the
security guarantees of the DTLS protocol.

For the stable distribution (buster), this problem has been fixed in
version 3.6.7-4+deb10u3.

We recommend that you upgrade your gnutls28 packages.

For the detailed security status of gnutls28 please refer to its
security tracker page at:
  https://security-tracker.debian.org/tracker/gnutls28

Further information about Debian Security Advisories, how to apply
these updates to your system and frequently asked questions can be
found at:   https://www.debian.org/security/