Gentoo Linux Security Advisory GLSA 200511-06 – Thomas Wolff discovered that fetchmailconf opens the configuration file with default permissions, writes the configuration to it, and only then restricts read permissions to the owner. Versions less than 6.2.5.2-r1 are affected.
You can download this advisory from the following link: https://packetstormsecurity.com/files/download/41360/glsa-200511-06.txt
Source: https://packetstormsecurity.com/files/41360/Gentoo-Linux-Security-Advisory-200511-6.html