on a pix 501? or is there a workaround on how to fix this:
George D. Gal has reported a vulnerability in Cisco PIX/ASA/FWSM, which can be exploited by malicious people to bypass certain security restrictions.
The vulnerability is caused due to an error within the handling of fragmented HTTP requests. This can be exploited to bypass Websense URL filtering and gain access to restricted websites via HTTP GET requests that are fragmented into multiple packets.
Successful exploitation requires that PIX, ASA, or FWSM are configured to use Websense/N2H2 for content filtering.
The vulnerability has been reported in the following products:
Table of ContentsIntroductionVersion HistoryPossible Future
UpdatesDocuments PurposeNAT Operation in ASA 8.3+ SectionsRule Types
Network Object NATTwice NAT / Manual NATRule Types used per SectionNAT
Types used with Twice NAT / Manual NAT and Network Obje...
Table of Contents Introduction:This document describes details on how
NAT-T works. Background: ESP encrypts all critical information,
encapsulating the entire inner TCP/UDP datagram within an ESP header.
ESP is an IP protocol in the same sense that TCP an...