FW: [Snort-users] Bug: snort-2.2.0 appears to be merging separate streams (was: Incorrect payload on acid alerts)

snortman at ...8908... snortman at ...8908...
Sat Nov 13 12:21:07 EST 2004


 I also think it's related to stream4. I have seen it happen to my sensor
with http_inspect disabled.

I am using snort 2.1.0 only updated rules up till now should I update to
2.1.3 or 2.2.0 to fix this problem ?
Has anyone seen this happen in version 2.1.3 ?

Additional info:
1. I am capturing traffic from 2 VLANS using port span. 
2. My traffic is pretty high.

Could this be the cause ?  

-----Original Message-----
From: snort-users-admin at lists.sourceforge.net
[mailto:snort-users-admin at lists.sourceforge.net] On Behalf Of Jason Haar
Sent: Saturday, November 13, 2004 10:55 AM
To: snort-users at lists.sourceforge.net
Subject: [Snort-users] Bug: snort-2.2.0 appears to be merging separate
streams (was: Incorrect payload on acid alerts)

Hmm - I can't find a bug reporting system as such - so I guess this just
goes here?

In the past week there have been 4(?) people all report snort-2.2.0 appears
to be merging separate data streams together into one alert (and I assume
that means was tracking them as one stream in the first place).
Just tonight I noticed an alert on one of my systems about a "NON-RFC HTTP
DELIMITER" which is nothing of the kind - it's around 3 separate HTTP
transactions that have been merged together (8134 bytes) - not end-to-end
either (there's a "\r\nr: unknown\r\n" in the middle of it that would have
actually been a "\r\nX-Forwarded-For: unknown\r\n" from our proxy server -
but has been "corrupted").

All the other email reports seem to be HTTP-related (which implies
http_inspect?), but I have seen it happen to both HTTP and SSH traffic -
which more implies stream4.

Has anyone on the Snort team picked up on this "noise" yet? :-)

Thanks!

Jason


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