tests: show how accept:flow can bypass threat detection

This test shows how an accept flow on an http request will skip thread
detection on http response data.

diff --git a/tests/firewall/ruletype-firewall-67-accept-flow-td-response-body/firewall.rules b/tests/firewall/ruletype-firewall-67-accept-flow-td-response-body/firewall.rules
new file mode 100644 (file)
index 0000000..9820b04
--- /dev/null
+++ b/tests/firewall/ruletype-firewall-67-accept-flow-td-response-body/firewall.rules
@@ -0,0 +1,6 @@
+accept:packet arp:all any any -> any any (sid:1;)
+
+accept:hook tcp:all any any <> any any (sid:10;)
+accept:hook http1:request_started any any -> any any (sid:500;)
+accept:hook http1:request_line any any -> any any (sid:501;)
+accept:flow http1:request_headers any any -> any any (http.host; content:"testmyids.com"; sid:502;)

diff --git a/tests/firewall/ruletype-firewall-67-accept-flow-td-response-body/suricata.yaml b/tests/firewall/ruletype-firewall-67-accept-flow-td-response-body/suricata.yaml
new file mode 100644 (file)
index 0000000..24e38b5
--- /dev/null
+++ b/tests/firewall/ruletype-firewall-67-accept-flow-td-response-body/suricata.yaml
@@ -0,0 +1,63 @@
+%YAML 1.1
+---
+
+vars:
+  # more specific is better for alert accuracy and performance
+  address-groups:
+    HOME_NET: "[192.168.0.0/16,10.0.0.0/8,172.16.0.0/12]"
+    #HOME_NET: "[192.168.0.0/16]"
+    #HOME_NET: "[10.0.0.0/8]"
+    #HOME_NET: "[172.16.0.0/12]"
+    #HOME_NET: "any"
+
+    EXTERNAL_NET: "!$HOME_NET"
+    #EXTERNAL_NET: "any"
+
+    HTTP_SERVERS: "$HOME_NET"
+    SMTP_SERVERS: "$HOME_NET"
+    SQL_SERVERS: "$HOME_NET"
+    DNS_SERVERS: "$HOME_NET"
+    TELNET_SERVERS: "$HOME_NET"
+    AIM_SERVERS: "$EXTERNAL_NET"
+    DC_SERVERS: "$HOME_NET"
+    DNP3_SERVER: "$HOME_NET"
+    DNP3_CLIENT: "$HOME_NET"
+    MODBUS_CLIENT: "$HOME_NET"
+    MODBUS_SERVER: "$HOME_NET"
+    ENIP_CLIENT: "$HOME_NET"
+    ENIP_SERVER: "$HOME_NET"
+
+  port-groups:
+    HTTP_PORTS: "80"
+    SHELLCODE_PORTS: "!80"
+    ORACLE_PORTS: 1521
+    SSH_PORTS: 22
+    DNP3_PORTS: 20000
+    MODBUS_PORTS: 502
+    FILE_DATA_PORTS: "[$HTTP_PORTS,110,143]"
+    FTP_PORTS: 21
+    GENEVE_PORTS: 6081
+    VXLAN_PORTS: 4789
+    TEREDO_PORTS: 3544
+    SIP_PORTS: "[5060, 5061]"
+
+# Global stats configuration
+stats:
+  enabled: yes
+  interval: 8
+
+# Configure the type of alert (and other) logging you would like.
+outputs:
+  - eve-log:
+      enabled: yes
+      filetype: regular #regular|syslog|unix_dgram|unix_stream|redis
+      filename: eve.json
+      types:
+        - stats
+        - flow
+        - alert
+        - tls:
+            extended: yes     # enable this for extended logging information
+        - drop:
+            alerts: yes      # log alerts that caused drops
+            flows: all       # start or all: 'start' logs only a single drop

diff --git a/tests/firewall/ruletype-firewall-67-accept-flow-td-response-body/td.rules b/tests/firewall/ruletype-firewall-67-accept-flow-td-response-body/td.rules
new file mode 100644 (file)
index 0000000..218746e
--- /dev/null
+++ b/tests/firewall/ruletype-firewall-67-accept-flow-td-response-body/td.rules
@@ -0,0 +1,2 @@
+alert http any any -> any any (http.host; content:"testmyids"; sid:5000;)
+alert http any any -> any any (msg:"GPL ATTACK_RESPONSE id check returned root"; http.response_body; content:"uid=0|28|root|29|"; sid:2100498; rev:7;)

diff --git a/tests/firewall/ruletype-firewall-67-accept-flow-td-response-body/test.yaml b/tests/firewall/ruletype-firewall-67-accept-flow-td-response-body/test.yaml
new file mode 100644 (file)
index 0000000..8d91be3
--- /dev/null
+++ b/tests/firewall/ruletype-firewall-67-accept-flow-td-response-body/test.yaml
@@ -0,0 +1,26 @@
+requires:
+  min-version: 9
+
+pcap: ../../flowbit-oring/input.pcap
+
+args:
+  - --simulate-ips
+  - -k none
+
+checks:
+- filter:
+    count: 1
+    match:
+      event_type: alert
+      alert.signature_id: 5000
+- filter:
+    count: 1
+    match:
+      event_type: alert
+      alert.signature_id: 2100498
+- filter:
+    count: 1
+    match:
+      event_type: stats
+      stats.ips.accepted: 10
+      stats.ips.blocked: 0