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Fix Cisco ASA/FTD msgs that use a host name as NAT address (elastic#1…
…8376) (elastic#18546) Sometimes the mapped source/destination IP field of an event is a hostname instead of an IP address. This caused ingestion of the event to fail. This patch makes the asa-ftd-pipeline to only populate those fields when a valid IP address is found. In the future we may want to revisit this if .nat.domain or .nat.address fields become available. (cherry picked from commit c4ccf2a)
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1 +1,3 @@ | ||
| <165>Oct 04 2019 15:27:55: %ASA-5-106100: access-list AL-DMZ-LB-IN denied tcp LB-DMZ/WHAT-IS-THIS-A-HOSTNAME-192.0.2.244(27218) -> OUTSIDE/203.0.113.42(53) hit-cnt 1 first hit [0x16847359, 0x00000000] | ||
| Jan 1 2020 10:42:53 localhost : %ASA-6-302021: Teardown ICMP connection for faddr 172.24.177.29/0 gaddr mydomain.example.net/17233 laddr 192.168.132.46/17233 | ||
| Jan 2 2020 11:33:20 localhost : %ASA-4-338204: Dynamic filter dropped greylisted TCP traffic from eth0:10.10.10.1/1234 (source.example.net/11234) to wan:172.24.177.3/80 (www.example.org/80), destination malicious address resolved from dynamic list: example.org, threat-level: high, category: malware |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,3 @@ | ||
| <165>Oct 04 2019 15:27:55: %ASA-5-106100: access-list AL-DMZ-LB-IN denied tcp LB-DMZ/WHAT-IS-THIS-A-HOSTNAME-192.0.2.244(27218) -> OUTSIDE/203.0.113.42(53) hit-cnt 1 first hit [0x16847359, 0x00000000] | ||
| Jan 1 2020 10:42:53 localhost : %ASA-6-302021: Teardown ICMP connection for faddr 172.24.177.29/0 gaddr mydomain.example.net/17233 laddr 192.168.132.46/17233 | ||
| Jan 2 2020 11:33:20 localhost : %ASA-4-338204: Dynamic filter dropped greylisted TCP traffic from eth0:10.10.10.1/1234 (source.example.net/11234) to wan:172.24.177.3/80 (www.example.org/80), destination malicious address resolved from dynamic list: example.org, threat-level: high, category: malware |
103 changes: 103 additions & 0 deletions
103
x-pack/filebeat/module/cisco/ftd/test/not-ip.log-expected.json
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,103 @@ | ||
| [ | ||
| { | ||
| "@timestamp": "2019-10-04T15:27:55.000-02:00", | ||
| "cisco.ftd.destination_interface": "OUTSIDE", | ||
| "cisco.ftd.message_id": "106100", | ||
| "cisco.ftd.rule_name": "AL-DMZ-LB-IN", | ||
| "cisco.ftd.source_interface": "LB-DMZ", | ||
| "destination.address": "203.0.113.42", | ||
| "destination.ip": "203.0.113.42", | ||
| "destination.port": 53, | ||
| "event.action": "firewall-rule", | ||
| "event.code": 106100, | ||
| "event.dataset": "cisco.ftd", | ||
| "event.module": "cisco", | ||
| "event.original": "%ASA-5-106100: access-list AL-DMZ-LB-IN denied tcp LB-DMZ/WHAT-IS-THIS-A-HOSTNAME-192.0.2.244(27218) -> OUTSIDE/203.0.113.42(53) hit-cnt 1 first hit [0x16847359, 0x00000000]", | ||
| "event.outcome": "deny", | ||
| "event.severity": 5, | ||
| "event.timezone": "-02:00", | ||
| "fileset.name": "ftd", | ||
| "input.type": "log", | ||
| "log.level": "notification", | ||
| "log.offset": 0, | ||
| "network.iana_number": 6, | ||
| "network.transport": "tcp", | ||
| "service.type": "cisco", | ||
| "source.address": "WHAT-IS-THIS-A-HOSTNAME-192.0.2.244", | ||
| "source.domain": "WHAT-IS-THIS-A-HOSTNAME-192.0.2.244", | ||
| "source.port": 27218, | ||
| "syslog.facility": 165, | ||
| "tags": [ | ||
| "cisco-ftd" | ||
| ] | ||
| }, | ||
| { | ||
| "@timestamp": "2020-01-01T10:42:53.000-02:00", | ||
| "cisco.ftd.mapped_source_host": "mydomain.example.net", | ||
| "cisco.ftd.message_id": "302021", | ||
| "destination.address": "172.24.177.29", | ||
| "destination.ip": "172.24.177.29", | ||
| "event.action": "flow-expiration", | ||
| "event.code": 302021, | ||
| "event.dataset": "cisco.ftd", | ||
| "event.module": "cisco", | ||
| "event.original": "%ASA-6-302021: Teardown ICMP connection for faddr 172.24.177.29/0 gaddr mydomain.example.net/17233 laddr 192.168.132.46/17233", | ||
| "event.severity": 6, | ||
| "event.timezone": "-02:00", | ||
| "fileset.name": "ftd", | ||
| "host.hostname": "localhost", | ||
| "input.type": "log", | ||
| "log.level": "informational", | ||
| "log.offset": 201, | ||
| "network.iana_number": 1, | ||
| "network.transport": "icmp", | ||
| "service.type": "cisco", | ||
| "source.address": "192.168.132.46", | ||
| "source.ip": "192.168.132.46", | ||
| "tags": [ | ||
| "cisco-ftd" | ||
| ] | ||
| }, | ||
| { | ||
| "@timestamp": "2020-01-02T11:33:20.000-02:00", | ||
| "cisco.ftd.destination_interface": "wan", | ||
| "cisco.ftd.mapped_destination_host": "www.example.org", | ||
| "cisco.ftd.mapped_destination_port": 80, | ||
| "cisco.ftd.mapped_source_host": "source.example.net", | ||
| "cisco.ftd.mapped_source_port": 11234, | ||
| "cisco.ftd.message_id": "338204", | ||
| "cisco.ftd.rule_name": "dynamic", | ||
| "cisco.ftd.source_interface": "eth0", | ||
| "cisco.ftd.threat_category": "malware", | ||
| "cisco.ftd.threat_level": "high", | ||
| "destination.address": "172.24.177.3", | ||
| "destination.domain": "example.org", | ||
| "destination.ip": "172.24.177.3", | ||
| "destination.nat.port": "80", | ||
| "destination.port": 80, | ||
| "event.action": "firewall-rule", | ||
| "event.code": 338204, | ||
| "event.dataset": "cisco.ftd", | ||
| "event.module": "cisco", | ||
| "event.original": "%ASA-4-338204: Dynamic filter dropped greylisted TCP traffic from eth0:10.10.10.1/1234 (source.example.net/11234) to wan:172.24.177.3/80 (www.example.org/80), destination malicious address resolved from dynamic list: example.org, threat-level: high, category: malware", | ||
| "event.outcome": "deny", | ||
| "event.severity": 4, | ||
| "event.timezone": "-02:00", | ||
| "fileset.name": "ftd", | ||
| "host.hostname": "localhost", | ||
| "input.type": "log", | ||
| "log.level": "warning", | ||
| "log.offset": 360, | ||
| "network.iana_number": 6, | ||
| "network.transport": "tcp", | ||
| "server.domain": "example.org", | ||
| "service.type": "cisco", | ||
| "source.address": "10.10.10.1", | ||
| "source.ip": "10.10.10.1", | ||
| "source.nat.port": "11234", | ||
| "source.port": 1234, | ||
| "tags": [ | ||
| "cisco-ftd" | ||
| ] | ||
| } | ||
| ] |
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