fetchmail email client before 5.9.10 does not properly limit the maximum number of messages available, which allows a remote IMAP server to overwrite memory via a message count that exceeds the boundaries of an array.Referenceshttp://online.securityfocus.com/advisories/4145http://www.iss.net/security_center/static/9133.phphttp://www.securityfocus.com/bid/4788ftp://ftp.caldera.com/pub/security/OpenLinux/CSSA-2002-027.0.txthttp://www.redhat.com/support/errata/RHSA-2002-047.htmlhttp://www.linux-mandrake.com/en/security/2002/MDKSA-2002-036.php