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ldap: Implement extended request/response and StartTLS support

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PCAP was produced with a local OpenLDAP server configured to support StartTLS.

This puts the Zeek calls into a separate ldap_zeek.spicy file/module
to separate it from LDAP.
This commit is contained in:
Arne Welzel 2024-07-17 17:00:53 +02:00
parent f4a79fa703
commit 09a48c7028
19 changed files with 269 additions and 22 deletions
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7
scripts/base/protocols/ldap/consts.zeek
View file

@ -120,4 +120,11 @@ export {
"searching", [ LDAP::SearchDerefAlias_DEREF_FINDING_BASE ] =
"finding", [ LDAP::SearchDerefAlias_DEREF_ALWAYS ] = "always", }
&default="unknown";
const EXTENDED_REQUESTS = {
# StartTLS, https://datatracker.ietf.org/doc/html/rfc4511#section-4.14.1
[ "1.3.6.1.4.1.1466.20037" ] = "StartTLS",
# whoami, https://datatracker.ietf.org/doc/html/rfc4532#section-2
[ "1.3.6.1.4.1.4203.1.11.3" ] = "whoami",
} &default="unknown" &redef;
}

3
scripts/base/protocols/ldap/main.zeek
View file

@ -258,6 +258,9 @@ event LDAP::message(c: connection,
}
m$object = object;
if ( opcode == LDAP::ProtocolOpcode_EXTENDED_REQUEST )
m$object += fmt(" (%s)", EXTENDED_REQUESTS[object]);
}
if ( argument != "" ) {

41
scripts/base/protocols/ldap/spicy-events.zeek
View file

@ -98,3 +98,44 @@ global LDAP::search_result_entry: event (
message_id: int,
object_name: string
);
## Event generated for each ExtendedRequest in LDAP messages.
##
## c: The connection.
##
## message_id: The messageID element.
##
## request_name: The name of the extended request.
##
## request_value: The value of the extended request (empty if missing).
global LDAP::extended_request: event (
c: connection,
message_id: int,
request_name: string,
request_value: string
);
## Event generated for each ExtendedResponse in LDAP messages.
##
## c: The connection.
##
## message_id: The messageID element.
##
## result: The result code of the response.
##
## response_name: The name of the extended response (empty if missing).
##
## response_value: The value of the extended response (empty if missing).
global LDAP::extended_response: event (
c: connection,
message_id: int,
result: LDAP::ResultCode,
response_name: string,
response_value: string
);
## Event generated when a plaintext LDAP connection switched to TLS.
##
## c: The connection.
##
global LDAP::starttls: event(c: connection);