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| Subject: | [Snort-sigs] false negative for SID 2386 |
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| Date: | Fri, 17 Jun 2005 15:54:30 +0200 |
Hi there, I recently found a few attempts to exploit that ASN.1 bug while going through a binary tcpdump-log using ethereal. GET / HTTP/1.0 Host: a.b.c.d Authorization: Negotiate YIIQegYGKwYBBQUCoIIQb [--cut--] Snort doesn't report this one. maybe the rule should be changed to alert tcp $EXTERNAL_NET any -> $HTTP_SERVERS $HTTP_PORTS (msg:"WEB-IIS NTLM ASN.1 vulnerability scan attempt"; flow:to_server,established; content:"Authorization|3A| Negotiate YI"; reference:bugtraq,9633; reference:bugtraq,9635; reference:cve,2003-0818; reference:nessus,12052; reference:nessus,12055; reference:nessus,12065; classtype:attempted-dos; sid:2386; rev:8;) as the Authorization only is the same upto here. Kind regards Lutz Schildt
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