Optimization #3406: filestore rules are loaded without warning when filestore is not enabled - Suricata - Open Information Security Foundation

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Optimization #3406

closed

filestore rules are loaded without warning when filestore is not enabled

Added by Peter Manev almost 5 years ago. Updated over 4 years ago.

Status:

Closed

Priority:

Normal

Assignee:

Jeff Lucovsky

Target version:

5.0.3

Effort:

Difficulty:

Label:

Description

Not sure what is best - warning or to handle it similar to https://redmine.openinfosecfoundation.org/issues/3204.

pevma@DonPedro:~/Work/Suricata/QA/tmp$ cat test-fs.rules 
alert http any any -> any any (msg:"test http filestore"; file.name; content:".exe"; filestore; sid:10; rev:1;)

pevma@DonPedro:~/Work/Suricata/QA/tmp$ sudo /opt/suritest/bin/suricata -T -S test-fs.rules 
[1305249] 11/12/2019 -- 12:18:49 - (suricata.c:1905) <Info> (ParseCommandLine) -- Running suricata under test mode
[1305249] 11/12/2019 -- 12:18:49 - (suricata.c:1083) <Notice> (LogVersion) -- This is Suricata version 5.0.1-dev (eceb7dcba 2019-12-10) running in SYSTEM mode
[1305249] 11/12/2019 -- 12:18:50 - (suricata.c:3060) <Notice> (main) -- Configuration provided was successfully loaded. Exiting.

pevma@DonPedro:~/Work/Suricata/QA/tmp$ sudo /opt/suritest/bin/suricata --dump-config |grep store
outputs.5 = tls-store
outputs.5.tls-store = (null)
outputs.5.tls-store.enabled = no
outputs.12 = file-store
outputs.12.file-store = (null)
outputs.12.file-store.version = 2
outputs.12.file-store.enabled = no
outputs.12.file-store.xff = (null)
outputs.12.file-store.xff.enabled = no
outputs.12.file-store.xff.mode = extra-data
outputs.12.file-store.xff.deployment = reverse
outputs.12.file-store.xff.header = X-Forwarded-For
outputs.13 = file-store
outputs.13.file-store = (null)
outputs.13.file-store.enabled = no
pevma@DonPedro:~/Work/Suricata/QA/tmp$

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Updated by Victor Julien almost 5 years ago

Status changed from New to Assigned
Assignee set to Jeff Lucovsky
Target version set to 5.0.2

I'm trying to think what good default behavior would be. I think fully rejecting the rules could be too harsh, as some ppl might add it to just store the file if filestore is enabled, but otherwise just get an alert. So perhaps a warning would be best.

Maybe a special case would be a rule that is 'noalert' and has no other side effects (e.g. setting a flowbit). Those can probably be rejected.

Lets start with a warning. Should probably be a one time warning to avoid flooding the log if a large ruleset uses the filestore keyword.

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