USN-4491-1: GnuTLS vulnerability

09 September 2020

GnuTLS could be made to crash or run programs if it received specially crafted network traffic.



  • gnutls28 - GNU TLS library


It was discovered that GnuTLS incorrectly handled certain alerts when being
used with TLS 1.3 servers. A remote attacker could use this issue to cause
GnuTLS to crash, resulting in a denial of service, or possibly execute
arbitrary code.

Update instructions

The problem can be corrected by updating your system to the following package versions:

Ubuntu 20.04

In general, a standard system update will make all the necessary changes.