The format string protection mechanism in IMAPD for Perdition Mail Retrieval Proxy 1.17 and earlier allows remote attackers to execute arbitrary code via an IMAP tag with a null byte followed by a format string specifier, which is not counted by the mechanism.
https://exchange.xforce.ibmcloud.com/vulnerabilities/38184
http://www.vupen.com/english/advisories/2007/3677
http://www.vergenet.net/linux/perdition/ChangeLog.shtml
http://www.securitytracker.com/id?1018883
http://www.securityfocus.com/bid/26270
http://www.securityfocus.com/archive/1/483034/100/0/threaded
http://www.sec-consult.com/300.html
http://www.debian.org/security/2007/dsa-1398
http://secunia.com/advisories/27520
http://secunia.com/advisories/27458
http://archives.neohapsis.com/archives/fulldisclosure/2007-10/0889.html