USN-4516-1: GnuPG vulnerability

Releases

• Ubuntu 18.04 ESM

Packages

• gnupg2 - GNU privacy guard - a free PGP replacement

Details

It was discovered that GnuPG signatures could be forged when the SHA-1
algorithm is being used. This update removes validating signatures based on
SHA-1 that were generated after 2019-01-19. In environments where this is
still required, a new option --allow-weak-key-signatures can be used to
revert this behaviour.

Update instructions

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

Ubuntu 18.04

• gnupg - 2.2.4-1ubuntu1.3

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

References

• CVE-2019-14855