CVE-2007-3537
IBM OS/400 (aka i5/OS) V4R2M0 through V5R3M0 on iSeries machines sends responses to TCP SYN-FIN packets, which allows remote attackers to obtain system information and possibly bypass firewall rules.
Date published : 2007-07-03
http://www-1.ibm.com/support/docview.wss?uid=nas2742405285431729b86256e620067dc17