[Snort-sigs] Suggestions for new attack response rules

Brian bmc at ...95...
Wed Dec 1 13:02:04 EST 2004

On Wed, Dec 01, 2004 at 03:51:25PM -0500, Joe Patterson wrote:
> alert tcp any $HTTP_PORTS -> any any (msg:"ATTACK-RESPONSES  User attack OK
> response"; flow:from_server,established; pcre:"/^HTTP/1.1 (2|3)\d\d/";
> flowbits:isset,http-user-attack; classtype:successful-user;)

Yes, I've thought about this for a long time.  Its not anywhere near
as simple as you suggest.

Look at how nessus handles error codes.  MANY websites no longer use
200s for "good", and 300s & 400s for various errors, they use 200s for

Sure, you might get a good feeling for the one or two sites you are
looking at for reducing false positives.  In the rest of the world,
just looking at HTTP codes is NOT enough.


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