[Snort-users] 2.0 bug in flow:?

Matt Kettler mkettler at ...4108...
Thu Jul 31 12:44:35 EDT 2003

The only thing I would check is to make sure you have stream4 enabled. 
AFAIK without it, flow's don't work.

At 03:24 AM 8/1/2003 +1200, Jason Haar wrote:
>Hi there
>I just had a bunch of FPs on the following rule:
>alert tcp any any -> any 1080 ( sid: 1000012; rev: 1; msg: "Trimble BugBear
>B Backdoor Attack"; flow: to_server,established; content: "|3b|o|3b|";
>reference:url,securityresponse.symantec.com/avcenter/venc/data/w32.bugbear.b at ...3071...;classtype:
>This triggered on a packet from a Win2K server (src port 139) to a client
>(dst port 1080), that contained the "|3b|o|3b|" content,yada yada.
>My problem is that I would have read that as "flow:from_server,established"
>- not "to_server"...
>Is the space to blame? If so, shouldn't snort sanity check that?
>Jason Haar
>Information Security Manager, Trimble Navigation Ltd.
>Phone: +64 3 9635 377 Fax: +64 3 9635 417
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