Microsoft Security announced Sep 2009 Advance Security Notification Bulletin; this month’ll see 5 security bulletins, all affecting Windows, and all with an aggregate severity rating of critical. Also, an update to Security Advisory 975191 is postd “a new proof of concept published allowing for Denial of Service (DoS) attacks on Windows XP and Windows Server 2003 with read access to FTP service. This does not require Write access. Also, a new POC allowing DoS was disclosed that affects FTP 6 which shipped with Vista and Windows Server 2008. Customers should be aware that Download Center has FTP 7.5 available for Windows Vista and Server 2008, which’s not vulnerable to any of these exploits. For resolution refer KB975191 Workaround section,” MSRC.