Eric Leblond [Sat, 29 Mar 2025 07:49:12 +0000 (08:49 +0100)]
datajson: add remove_key option to dataset
This option allows to remove the key corresponding to the match
value from the JSON object before creating the JSON object that
will be added to the `extra` data.
For example, matching on the following JSON on the `ip` key:
Eric Leblond [Sun, 2 Mar 2025 16:34:06 +0000 (17:34 +0100)]
detect/pcre: add extraction for alert
With datajson infrastructure in place, it is now possible to
add data in the extra information section. Following an idea
by Jason Ish, this patch adds the feature for pcre extraction.
A PCRE such as pcre:"/(?P<alert_ua>[a-zA-Z]+)\//" will add the
content of the captured group to alert.extra.ua.
Eric Leblond [Sun, 2 Mar 2025 16:34:38 +0000 (17:34 +0100)]
datajson: introduce feature
This patch introduces new option to dataset keyword.
Where regular dataset allows match from sets, dataset with json
format allows the same but also adds JSON data to the alert
event. This data is coming from the set definition it self.
For example, an ipv4 set will look like:
The syntax is a JSON array but it can also be a JSON object
with an array inside. The idea is to directly used data coming
from the API of a threat intel management software.
This way, a single dataset is able to produce context to the
event where it was not possible before and multiple signatures
had to be used.
The format introduced in datajson is an evolution of the
historical datarep format. This has some limitations. For example,
if a user fetch IOCs from a threat intel server there is a large
change that the format will be JSON or XML. Suricata has no support
for the second but can support the first one.
Keeping the key value may seem redundant but it is useful to have it
directly accessible in the extra data to be able to query it
independantly of the signature (where it can be multiple metadata
or even be a transformed metadata).
In some case, when interacting with data (mostly coming from
threat intel servers), the JSON array containing the data
to use is not at the root of the object and it is ncessary
to access a subobject.
This patch implements this with support of key in level1.level2.
This is done via the `array_key` option that contains the path
to the data.
Victor Julien [Tue, 10 Jun 2025 10:40:21 +0000 (12:40 +0200)]
threads: clean up module flags
Remove unused TM_FLAG_STREAM_TM.
Rename TM_FLAG_DETECT_TM to TM_FLAG_FLOWWORKER_TM as it was mostly used
to check if a thread is a flow worker. TM_FLAG_DETECT_TM was always set
for a flow worker, even when there was no detection in use.
Victor Julien [Tue, 10 Jun 2025 09:33:03 +0000 (11:33 +0200)]
threading: fix shutdown of IPS autofp modes
For IPS modes with a verdict thread in autofp there was an issue with
the verdict thread not shutting down, leading to a long shutdown time
until an error condition was reached.
The problem was that when the packet threads, of which the verdict
thread is one, were told to enter their flow timeout loop the verdict
thread got stuck as it immediately progressed to THV_RUNNING_DONE
instead of the expected THV_FLOW_LOOP.
This patch updates the shutdown logic to only apply the flow timeout
logic to the relevant threads, and skip the verdict thread(s).
Add TM_FLAG_VERDICT_TM to indicate a thread has a verdict module to more
explicitly shut it down.
Victor Julien [Thu, 5 Jun 2025 08:43:22 +0000 (10:43 +0200)]
detect: set detect table for non-firewall mode as well
This also exposed a difference between the handling of TD alerts in
firewall vs non-firewall mode. In firewall mode the table/hook is also
part of the alert ordering to make sure actions from packet:td are
applied before app:td. Handle that explicitly for now.
Jeff Lucovsky [Sat, 7 Jun 2025 13:25:52 +0000 (09:25 -0400)]
detect: Ensure byte* variable usages is for same buffers
Issue: 7549
Use the active buffer list to fetch SM variables to ensure that they are
part of the same list so a variable created with bytemath or byteextract
will have context when used with bytejump, e.g
Jason Ish [Thu, 5 Jun 2025 15:20:08 +0000 (09:20 -0600)]
dns: log addresses in order of packet
DNS logs have always been logged in flow direction, this can be
confusing as DNS responses have a src_ip of the client, but it makes
more sense to have the src_ip for the server, as that is the src_ip of
the response packet.
As this is a breaking change, limit it DNS v3 logging which was
introduced, and is the default for Suricata 8.0.
Jason Ish [Thu, 5 Jun 2025 21:41:40 +0000 (15:41 -0600)]
output: delayed initialization for custom loggers
When a plugin is first initialized, it is too early to register
transaction loggers. Instead, a plugin can register a callback to be
called when Suricata is ready for outputs like transaction loggers to
be registered.
Likewise for library users, there is a window in SuricataInit where
transaction loggers can be registered that library users don't have
access to. So a lifecycle callback useful here as well.