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Feature #5746

closed

http.connection - allow in server response

Added by Brandon Murphy over 2 years ago. Updated about 2 years ago.

Status:
Closed
Priority:
Normal
Assignee:
Philippe Antoine
Target version:
7.0.0-rc2
Effort:
Difficulty:
Label:

Description

Currently when using http.connection in combination with "to_client" produces the following error

Problem starting Suricata daemon: 7/12/2022 -- 19:57:49 - <Error> - [ERRCODE: SC_ERR_INVALID_SIGNATURE(39)] - rule 1 mixes keywords with conflicting directions

however, for whatever reason, the connection header is often observed in the HTTP Server Response.

This limitation forces the use of http.header to match on the Connection header instead of using the more specific buffer.

Files

out.pcap (1.19 KB) out.pcap Brandon Murphy, 12/08/2022 03:49 AM
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 #1

Updated by Victor Julien over 2 years ago

Can you share a pcap / SV test for a connection with connection header in to client direction?

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 #2

Updated by Brandon Murphy over 2 years ago

You betcha! Attached is a pcap of a wget to a benign site which exhibits this same behavior.

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 #3

Updated by Victor Julien about 2 years ago

  • Status changed from New to Assigned
  • Assignee changed from OISF Dev to Philippe Antoine
  • Target version changed from TBD to 7.0.0-rc2
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 #4

Updated by Philippe Antoine about 2 years ago

  • Status changed from Assigned to In Review

https://github.com/OISF/suricata/pull/8644

Tested non out.pcap with alert tcp any any -> any any (msg:"tfo test15"; flow: to_client; http.connection; content:"close"; sid:15;)

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 #5

Updated by Victor Julien about 2 years ago

  • Status changed from In Review to Closed
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