Via FrSIRT: http://www.frsirt.com/english/advisories/2005/0527 - ferg [snip] * Technical Description * A new vulnerability was identified in Cisco products, which may be exploited by attackers to bypass the security restrictions. The flaw resides in the Cisco Firewall Services Module (FWSM) when configured for exceptions in content filtering, which may be exploited by attackers to bypass access-list entries intended to explicitly filter inbound TCP packets. * Affected Products * Catalyst 6500 series switches Cisco 7600 series routers * Solution * Upgrade to Cisco FWSM version 2.3(2) : http://www.cisco.com/warp/public/707/cisco-sa-20050511-url.shtml [snip] -- "Fergie", a.k.a. Paul Ferguson Engineering Architecture for the Internet fergdawg@netzero.net or fergdawg@sbcglobal.net ferg's tech blog: http://fergdawg.blogspot.com/