The POP3-over-SSL implementation in getmail 4.0.0 through 4.44.0 does not verify X.509 certificates from SSL servers, which allows man-in-the-middle attackers to spoof POP3 servers and obtain sensitive information via a crafted certificate.
http://www.debian.org/security/2014/dsa-3091
http://secunia.com/advisories/61229
http://pyropus.ca/software/getmail/CHANGELOG
http://openwall.com/lists/oss-security/2014/10/07/33
http://lists.opensuse.org/opensuse-updates/2014-10/msg00029.html