[Full-disclosure] TippingPoint IPS Signature Evasion

[3APA3A]

Dear Paul Craig,

--Wednesday, July 11, 2007, 1:37:03 AM, you wrote to bugtraq at securityfocus.com:


PC> http://www.test.com/scripts%c0%afcmd.exe
PC> http://www.test.com/scripts%e0%80%afcmd.exe
PC> http://www.test.com/scripts%c1%9ccmd.exe

PC> Web servers located behind a Tippingpoint IPS device which are capable
PC> of decoding alternate Unicode characters can be accessed, and exploited
PC> without triggering the IPS device.

Can  you,  please, provide example of such server? Fatih Ozavci reported
similar   problem   with  Checkpoint  and  Halfwidth/Fullwidth  Unicode,
potential  attack  vector  was IIS with .Net framework, in this case IIS
seems not to be exploitable.

Blaming IPS it does not detect attack which is impossible in-the-wild is
nonsense. Blaming corporate-level IPS doesn't detect attack against SOHO
web server is acceptable nonsense :)

-- 
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