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Re: Snort 2.9.0.2 / barnyard2 / base 1.4.5 signature not displayed and is unclassified
From: Russ Combs <rcombs () sourcefire com>
Date: Fri, 17 Dec 2010 13:36:57 -0500

bugs () snort org

On Fri, Dec 17, 2010 at 1:30 PM, Eoin Miller <
eoin.miller () trojanedbinaries com> wrote:

On 12/17/2010 6:01 PM, JS wrote:
Eoin/Kevin,

Thanks I think I finally got it resolved. Turns out, I updated all my
files with
the 2.9.0.1 ruleset as described in my first post. The gen-msg.map that
comes
with 2.9.0.2 does indeed have the missing stream5 entries! The
gen-msg.map that
comes with 2.9.0.1 does NOT.

Ugh, guess I now know you only upgrade your rules with matching versions.
I did
not think it would be that big of a deal to use 2.9.0.1 rules with a
2.9.0.2
snort install.

Thanks.

Hmm, looks like there is missing stuff in the VRT rules versus the
Source stuff:


gen-msg.map for 2.9.0.1 from SOURCE:
========================================================================
$ grep "129 ||" snort-2.9.0.1/etc/gen-msg.map
129 || 1 || stream5: SYN on established session
129 || 2 || stream5: Data on SYN packet
129 || 3 || stream5: Data sent on stream not accepting data
129 || 4 || stream5: TCP Timestamp is outside of PAWS window
129 || 5 || stream5: Bad segment, overlap adjusted size less than/equal 0
129 || 6 || stream5: Window size (after scaling) larger than policy allows
129 || 7 || stream5: Limit on number of overlapping TCP packets reached
129 || 8 || stream5: Data sent on stream after TCP Reset
129 || 9 || stream5: TCP Client possibly hijacked, different Ethernet
Address
129 || 10 || stream5: TCP Server possibly hijacked, different Ethernet
Address
129 || 11 || stream5: TCP Data with no TCP Flags set
129 || 12 || stream5: TCP Small Segment Threshold Exceeded
129 || 13 || stream5: TCP 4-way handshake detected
129 || 14 || stream5: TCP Timestamp is missing
129 || 15 || stream5: Reset outside window
129 || 16 || stream5: FIN number is greater than prior FIN
129 || 17 || stream5: ACK number is greater than prior FIN
129 || 18 || stream5: Data sent on stream after TCP Reset received
129 || 19 || stream5: TCP window closed before receiving data


gen-msg.map for 2.9.0.1 from VRT (just pulled about 10 min ago):
========================================================================
128 || 7 || ssh: Failed to detect SSH version string
129 || 1 || stream5: SYN on established session
129 || 2 || stream5: Data on SYN packet
129 || 3 || stream5: Data sent on stream not accepting data
129 || 4 || stream5: TCP Timestamp is outside of PAWS window
129 || 5 || stream5: Bad segment, overlap adjusted size less than/equal 0
129 || 6 || stream5: Window size (after scaling) larger than policy allows
129 || 7 || stream5: Limit on number of overlapping TCP packets reached
129 || 8 || stream5: Data sent on stream after TCP Reset
129 || 9 || stream5: TCP Client possibly hijacked, different Ethernet
Address
129 || 10 || stream5: TCP Server possibly hijacked, different Ethernet
Address
129 || 11 || stream5: TCP Data with no TCP Flags set
129 || 12 || stream5: TCP Small Segment Threshold Exceeded
129 || 13 || stream5: TCP 4-way handshake detected
129 || 14 || stream5: TCP Timestamp is missing
130 || 1 || dcerpc: Maximum memory usage reached

I guess Matt W is the best one to to alert about this (cc'd on this email)?

-- Eoin

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