USN-4233-1: GnuTLS update
9 January 2020
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 18.04 LTS
- Ubuntu 16.04 LTS
SHA1 has been marked as untrusted in GnuTLS.
- gnutls28 - GNU TLS library
As a security improvement, this update marks SHA1 as being untrusted for digital signature operations.
The problem can be corrected by updating your system to the following package versions:
To update your system, please follow these instructions: https://wiki.ubuntu.com/Security/Upgrades.
In general, a standard system update will make all the necessary changes.