Gentoo Linux Security Advisory GLSA 200603-08 – OpenPGP is the standard that defines the format of digital signatures supported by GnuPG. OpenPGP signatures consist of multiple sections, in a strictly defined order. Tavis Ormandy of the Gentoo Linux Security Audit Team discovered that certain illegal signature formats could allow signed data to be modified without detection. GnuPG has previously attempted to be lenient when processing malformed or legacy signature formats, but this has now been found to be insecure. Versions less than 1.4.2.2 are affected.
You can download this advisory from the following link: https://packetstormsecurity.com/files/download/44568/glsa-200603-08.txt
Source: https://packetstormsecurity.com/files/44568/Gentoo-Linux-Security-Advisory-200603-8.html