A GnuTLS update has been released for both Ubuntu Linux 18.04 LTS and 16.04 LTS
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Ubuntu Security Notice USN-4233-1
January 09, 2020
gnutls28 update
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A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 18.04 LTS
- Ubuntu 16.04 LTS
Summary:
SHA1 has been marked as untrusted in GnuTLS.
Software Description:
- gnutls28: GNU TLS library
Details:
As a security improvement, this update marks SHA1 as being untrusted for
digital signature operations.
Update instructions:
The problem can be corrected by updating your system to the following
package versions:
Ubuntu 18.04 LTS:
libgnutls30 3.5.18-1ubuntu1.2
Ubuntu 16.04 LTS:
libgnutls30 3.4.10-4ubuntu1.6
In general, a standard system update will make all the necessary changes.
References:
https://usn.ubuntu.com/4233-1
https://launchpad.net/bugs/1858691
Package Information:
https://launchpad.net/ubuntu/+source/gnutls28/3.5.18-1ubuntu1.2
https://launchpad.net/ubuntu/+source/gnutls28/3.4.10-4ubuntu1.6
