Re: Statefull inspection on IDS - Stick

[Joe Klemencic <JKlemenc () FNAL GOV>]

This was released on 3/7 to the FOCUS-IDS list regarding STICK:






Please respond to Cortez <coretez () 8THPORT COM>

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Subject:  Re: Statefull inspection on IDS - Stick


Over the last couple months I've been finishing up work on a tool called
stick.  I was planning to release a paper in the coming week and the tool
in a month or two from now when IDS vendors have had time to make
modifications to handle it.

The tool uses the Snort rule set and produces a C program via lex that when
compiled will produce an IP packet capable of triggering that rule from a
spoofed IP range (or all possible IP addresses) into a target IP range.  A
function is produced for each rule and a loop then executes these rules in
a random order.  The tool currently produces these at about 250 alarms per
second.

A Linux based snort will hit 100% CPU and start dropping packets.  The
stress on recording and disk IO is another problem.

ISS Real Secure dies two seconds after the attack begins.  This was tested
numerous times.

Other IDS and even sniffers (especially with DNS lookups) had problems of
their own.

I will be trying to release the code to IDS vendors over the next couple of
months in order for them to make changes they see fit.  The tool was
initially designed to test bandwidth and stress on IDS, but it obviously
can be used in a malicious manner and that is not my intent.

A draft paper can be seen at http://www.eurocompton.net/stick/ ... please
ignore the spelling and grammar changes.  A more technical paper and
analysis will hopefully be briefed at Blackhat if DT approves it.

Coretez G.






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Subject:  Stick DOS


There has been word of a possible DOS that will be released on the 15th of
this month that will have the capability of taking down stateless
firewalls.
The DOS is called "Stick".  It is supposed to send numerous malformed
packets from spoofed sources.  Does anybody out on the list have any
information on how to prevent this from happening or any information
whatsoever on the DOS.  Any help would be greatly appreciated.