A vulnerability affecting GnuPG has made some of the widely used email encryption software vulnerable to digital signature spoofing for many years. The list of affected programs includes Enigmail and GPGTools. About the vulnerability (CVE-2018-12020) CVE-2018-12020, dubbed “SigSpoof” by Marcus Brinkmann, the researcher which found it, arises from “weak design choices.” “The signature verification routine…