Amazon Linux AMI Security Advisory: ALAS-2018-1045
Advisory Release Date: 2018-06-27 21:57 Pacific
A data validation flaw was found in the way gnupg processes file names during decryption and signature validation. An attacker may be able to inject messages into gnupg verbose message logging which may have the potential to bypass the integrity of signature authentication mechanisms and could have other unintended consequences if applications take action(s) based on parsed verbose gnupg output. (CVE-2018-12020 )
Run yum update gnupg to update your system.