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Bug #1904

closed

modbus: duplicate alerts / detection unaware of direction

Added by Victor Julien about 8 years ago. Updated over 6 years ago.

Status:
Closed
Priority:
Normal
Assignee:
David DIALLO
Target version:
4.1beta1
Affected Versions:
Effort:
Difficulty:
Label:

Description

In the current master a rule like this

alert modbus any any -> any any (msg:"Start electric motor"; modbus: access write holding, address 521, value 2; sid:6; rev:1; )

Will match both on the toserver and toclient direction regardless of which direction this command was send in. This is because the detection logic is unaware of direction.

Maybe related to #1574.

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