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Bug #4715
openpcre keyword cause more alert!
Status:
New
Priority:
Normal
Assignee:
-
Target version:
-
Affected Versions:
Effort:
Difficulty:
Label:
Description
When I use the pcre keyword to detect pcap. It alerted 156 times.alert smb any any -> any any (msg:"smb test";pcre:"/test/";sid:26;)
But, Change pcre keyword to content keyword, it alerted 5 times.alert smb any any -> any any (msg:"smb test";content:"test";sid:27;)
What caused this?
Does PCRE change the detection mode ?
If this is the reason, What keyword can make pcre keyword like content keyword work?
Updated by Philippe Antoine 10 months ago
Would you have a pcap to reproduce this ?
Also, please note that using pcre on stream without any fixed content will lead to very poor performance
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