Format string vulnerability in the ParseBannerAndCapability function in main.c for up-imapproxy 1.2.3 and 1.2.4 allows remote IMAP servers to execute arbitrary code via format string specifiers in a banner or capability line.
http://www.vupen.com/english/advisories/2005/2015
http://www.vupen.com/english/advisories/2005/2014
http://www.securityfocus.com/bid/15048
http://www.gentoo.org/security/en/glsa/glsa-200603-04.xml
http://www.debian.org/security/2005/dsa-852
http://securityreason.com/securityalert/547
http://secunia.com/advisories/19113