Stack-based buffer overflow in pop3d in Cyrus IMAPD (cyrus-imapd) 2.3.2, when the popsubfolders option is enabled, allows remote attackers to execute arbitrary code via a long USER command.
https://exchange.xforce.ibmcloud.com/vulnerabilities/26578
https://euvd.enisa.europa.eu/vulnerability/EUVD-2006-2502
http://www.vupen.com/english/advisories/2006/1891
http://www.securityfocus.com/bid/18056
http://securitytracker.com/id?1016131
http://archives.neohapsis.com/archives/fulldisclosure/2006-05/0527.html