Heap-based buffer overflow in Fetchmail 6.1.3 and earlier does not account for the "@" character when determining buffer lengths for local addresses, which allows remote attackers to execute arbitrary code via a header with a large number of local addresses.
https://exchange.xforce.ibmcloud.com/vulnerabilities/10839
http://www.securityfocus.com/bid/6390
http://www.redhat.com/support/errata/RHSA-2003-155.html
http://www.redhat.com/support/errata/RHSA-2002-294.html
http://www.redhat.com/support/errata/RHSA-2002-293.html
http://www.mandrakesoft.com/security/advisories?name=MDKSA-2003:011
http://www.debian.org/security/2002/dsa-216
http://security.e-matters.de/advisories/052002.html
http://marc.info/?l=bugtraq&m=104004858802000&w=2
http://marc.info/?l=bugtraq&m=103979751818638&w=2
http://distro.conectiva.com.br/atualizacoes/?id=a&anuncio=000554