Talk:Intrusion detection system evasion techniques: Difference between revisions

Revision as of 01:03, 21 March 2007

Revision as of 17:48, 22 March 2007

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this article needs some serious additions, there should be discussion of Dan Kaminsky's temporal ip fraging attacks, there should be mention of different web encodings, like chuncked encodings to evade, use of uuencoding in email, url encoding in uri's, double and tripple url encodings, gziping web pages, msrpc fragmentation, many IPSs simply look for jmp esp offsets, so changing the defaults on an exploit often works, playing games with TCP segmentation rules for accept first vs accept last can be used, mislabling file types, embedding one type in another (as seen on some of Alex Wheeler's AV bugs), unicode in url's, tunneling traffic using something like ip in ip often works (when applicable), encrypting connections to target hosts (e.g. attacking apache over ssl so the IPS cant see it), encoding a web page with java script and assembling offending content client side, double/tripple/etc encoding with java script...those are just a few off the top of my head, some of that is covered a little bit but it would be nice some of this added...I can try to add some of that as time permits --[[User:Abaddon314159|Michael Lynn]] 01:03, 21 March 2007 (UTC)

: Sure, those would be good things to add in. Do you think that 'encoding' is part of 'obfuscation', or is its own top-level evasion category? I'm leaning toward the latter, particularly after your list of encoding-related techniques. I can try to add some when I have time, or you can, either way. --[[User:Sgorton|Sgorton]] 17:48, 22 March 2007 (UTC)