Snort mailing list archives
FP shows snort-2.9.0.3 confused over packets and sessions
From: Jason Haar <Jason.Haar () trimble co nz>
Date: Tue, 10 May 2011 16:03:28 +1200
Hi there This rule just FP'ed here on a user POSTing something. The rule says alert tcp $EXTERNAL_NET any -> $HTTP_SERVERS $HTTP_PORTS (msg:"WEB-MISC Sun Java Web Server Webdav Stack Buffer Overflow attempt"; flow:to_server,established; content:"COPY"; depth:4; nocase; isdataat:200,relative; pcre:"/^COPY(?!\n)\s[^\n]{200}/smi"; metadata:policy balanced-ips drop, policy security-ips drop, service http; reference:bugtraq,37874; reference:cve,2010-0361; classtype:attempted-admin; sid:17609; rev:1;) ..but somehow it triggered on a packet (going through a proxy if it matters) that the snort PCAP states begins with copy to blah-blah-blah..... It seems to me this has matched on the beginning of a *packet* instead of the beginning of a TCP *session*? What should I be looking at to fix this? I assume I've got something amiss in stream5 or something? As I said, I've checked the proxy logs and that was a POST command of 2178 bytes. No HTTP headers/etc shows up in this captured packet - so I'd say it was the 2nd data packet in the TCP session Thanks -- Cheers Jason Haar Information Security Manager, Trimble Navigation Ltd. Phone: +64 3 9635 377 Fax: +64 3 9635 417 PGP Fingerprint: 7A2E 0407 C9A6 CAF6 2B9F 8422 C063 5EBB FE1D 66D1 ------------------------------------------------------------------------------ Achieve unprecedented app performance and reliability What every C/C++ and Fortran developer should know. Learn how Intel has extended the reach of its next-generation tools to help boost performance applications - inlcuding clusters. http://p.sf.net/sfu/intel-dev2devmay _______________________________________________ Snort-users mailing list Snort-users () lists sourceforge net Go to this URL to change user options or unsubscribe: https://lists.sourceforge.net/lists/listinfo/snort-users Snort-users list archive: http://www.geocrawler.com/redir-sf.php3?list=snort-users
Current thread:
- FP shows snort-2.9.0.3 confused over packets and sessions Jason Haar (May 09)
- Re: FP shows snort-2.9.0.3 confused over packets and sessions rmkml (May 10)
- Re: FP shows snort-2.9.0.3 confused over packets and sessions Jason Haar (May 11)
- flow:established still broken in 2.9.0.5? (was:FP shows snort-2.9.0.3 confused over packets and sessions) Jason Haar (Jun 29)
- Re: flow:established still broken in 2.9.0.5? (was:FP shows snort-2.9.0.3 confused over packets and sessions) Joel Esler (Jun 29)
- Re: flow:established still broken in 2.9.0.5? (was:FP shows snort-2.9.0.3 confused over packets and sessions) Matthew Jonkman (Jun 29)
- Re: flow:established still broken in 2.9.0.5? (was:FP shows snort-2.9.0.3 confused over packets and sessions) Joel Esler (Jun 29)
- Re: flow:established still broken in 2.9.0.5? Jason Haar (Jun 29)
- Re: flow:established still broken in 2.9.0.5? Russ Combs (Jun 29)
- Re: flow:established still broken in 2.9.0.5? Jason Haar (Jun 29)
- Re: flow:established still broken in 2.9.0.5? Jason Wallace (Jun 29)
- Re: FP shows snort-2.9.0.3 confused over packets and sessions Jason Haar (May 11)
- Re: FP shows snort-2.9.0.3 confused over packets and sessions rmkml (May 10)