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Make ports for LDAP analyzers fully configurable

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This moves the ports the LDAP analyzers should be triggered on from the
EVT file to the Zeek module. This gives users full control over which
ports the analyzers are registered for while previously they could only
register them for additional ports (there is no Zeek script equivalent
of `Manager::UnregisterAnalyzerForPort`).

The analyzers could still be triggered via DPD, but this is intentional.
To fully disable analyzers users can use e.g.,

```zeek
event zeek_init()
    {
    Analyzer::disable_analyzer(Analyzer::ANALYZER_LDAP_TCP);
    }
```
This commit is contained in:
Benjamin Bannier 2023-09-21 13:13:32 +02:00
parent c0daacfbd1
commit 9b02b93889
6 changed files with 24 additions and 15 deletions
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11
scripts/base/protocols/ldap/main.zeek
View file

@ -6,6 +6,14 @@ export {
redef enum Log::ID += { LDAP_LOG,
LDAP_SEARCH_LOG };
## TCP ports which should be considered for analysis.
const ports_tcp = { 389/tcp, 3268/tcp } &redef;
## UDP ports which should be considered for analysis.
const ports_udp = { 389/udp } &redef;
redef likely_server_ports += { LDAP::ports_tcp, LDAP::ports_udp };
## Whether clear text passwords are captured or not.
option default_capture_password = F;
@ -260,6 +268,9 @@ redef record connection += {
#############################################################################
event zeek_init() &priority=5 {
Analyzer::register_for_ports(Analyzer::ANALYZER_LDAP_TCP, LDAP::ports_tcp);
Analyzer::register_for_ports(Analyzer::ANALYZER_LDAP_UDP, LDAP::ports_udp);
Log::create_stream(LDAP::LDAP_LOG, [$columns=Message, $ev=log_ldap, $path="ldap", $policy=log_policy]);
Log::create_stream(LDAP::LDAP_SEARCH_LOG, [$columns=Search, $ev=log_ldap_search, $path="ldap_search", $policy=log_policy_search]);
}