CVE-2020-11501

Published: 03 April 2020

GnuTLS 3.6.x before 3.6.13 uses incorrect cryptography for DTLS. The earliest affected version is 3.6.3 (2018-07-16) because of an error in a 2017-10-06 commit. The DTLS client always uses 32 '\0' bytes instead of a random value, and thus contributes no randomness to a DTLS negotiation. This breaks the security guarantees of the DTLS protocol.

Priority

Medium

CVSS 3 base score: 7.4

Status

Package Release Status
gnutls28
Launchpad, Ubuntu, Debian
Upstream
Released (3.6.13-2)
Ubuntu 18.04 LTS (Bionic Beaver) Not vulnerable
(3.5.18-1ubuntu1.3)
Ubuntu 16.04 ESM (Xenial Xerus) Not vulnerable
(3.4.10-4ubuntu1.7)
Ubuntu 14.04 ESM (Trusty Tahr) Does not exist

Patches:
Upstream: https://gitlab.com/gnutls/gnutls/-/commit/c01011c2d8533dbbbe754e49e256c109cb848d0d