About Custom Vulnerability Signature

KiCheon.Lee — Tue, 17 Jun 2014 16:01:41 GMT

Hello,

My customer made vulnerability signature in FW. But FW doesn't detect this signature.

Customer Vulnerability Signature

context : http-req-message-body

pattern : eval\(gzinflate\(str_rot13\(base64_decode

I am searching this but I don't know.

So I need your assistance for it.

I have read Creating_Custom_Signatures-RevA.pdf document

This document describe as the following message.

http-req-message-body

Description: Body content of a HTTP request when the body content cannot be recognized as URL encoded or MIME type data using the Content-type field.

Do you know to relate between not detecting signature and this description??

Thanks

Re: About Custom Vulnerability Signature

HITSSEC — Fri, 01 Aug 2014 02:21:59 GMT

Cheon,

Can you get a pcap of the traffic flow including the pattern shown? I am not aware of how this string is used? (inbound to your servers of outbound from internal users) Also is the traffic encrypted? If so you wil need to decrypt it,

Phil

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About Custom Vulnerability Signature

Re: About Custom Vulnerability Signature