Fix meta-actions not being applied if multiMatch is enabled in the chain starter rule

Meta-actions can only be used in non-chained rules or in the chain starter
rule of a rule chain. The m_chainedRuleParent member of the RuleWithActions
class is NULL only if the rule is not chained or if it is the chain starter
rule of a rule chain.

Fixes #2867.

Author: mlevogiannis

src/rule_with_actions.cc

@@ -219,7 +219,7 @@ void RuleWithActions::executeActionsIndependentOfChainedRuleResult(Transaction *
         }
     }
 
-    if (m_containsMultiMatchAction && !m_isChained) {
+    if (m_containsMultiMatchAction && m_chainedRuleParent == nullptr) {
         if (m_severity) {
             m_severity->evaluate(this, trans, ruleMessage);
         }

test/test-cases/regression/auditlog.json

@@ -318,5 +318,105 @@
       "SecAuditLogType Serial",
       "SecAuditLogRelevantStatus \"^(?:5|4(?!04))\""
     ]
+  },
+  {
+    "enabled": 1,
+    "version_min": 300000,
+    "version_max": 0,
+    "title": "auditlog : rule chain, multiMatch data, match after last transform",
+    "client": {
+      "ip": "200.249.12.31",
+      "port": 2313
+    },
+    "server": {
+      "ip": "200.249.12.31",
+      "port": 80
+    },
+    "request": {
+      "headers": {
+        "Host": "www.modsecurity.org",
+        "User-Agent": "Mozilla\/5.0 (Windows; U; Windows NT 6.1; en-US; rv:1.9.1.5) Gecko\/20091102 Firefox\/3.5.5 (.NET CLR 3.5.30729)",
+        "Accept": "text\/html,application\/xhtml+xml,application\/xml;q=0.9,*\/*;q=0.8",
+        "Accept-Language": "en-us,en;q=0.5",
+        "Accept-Encoding": "gzip,deflate",
+        "Accept-Charset": "ISO-8859-1,utf-8;q=0.7,*;q=0.7",
+        "Keep-Alive": "300",
+        "Connection": "keep-alive",
+        "Pragma": "no-cache",
+        "Cache-Control": "no-cache"
+      },
+      "uri": "\/test.pl?param1=test&param2=tEst2",
+      "method": "GET",
+      "http_version": 1.1,
+      "body": ""
+    },
+    "expected": {
+      "audit_log": "\\[msg \"testmsg\"\\] \\[data \"testdata\"\\] \\[severity \"7\"\\] \\[ver \"\"\\] \\[maturity \"0\"\\] \\[accuracy \"0\"\\] \\[tag \"testtag1\"\\] \\[tag \"testtag2\"\\]",
+      "error_log": "",
+      "http_code": 403
+    },
+    "rules": [
+      "SecRuleEngine On",
+      "SecDefaultAction \"phase:1,nolog,auditlog,deny,status:403\"",
+      "SecRule ARGS \"@contains test2\" \"id:1559,phase:1,multiMatch,block,log,t:none,t:urlDecode,t:lowercase,msg:'testmsg',logdata:'testdata',severity:'DEBUG',tag:'testtag1',tag:'testtag2',chain\"",
+      "SecRule REQUEST_METHOD \"@streq GET\" \"t:none\"",
+      "SecAuditEngine RelevantOnly",
+      "SecAuditLogParts ABCFHZ",
+      "SecAuditLog /tmp/test/modsec_audit_multimatch_3.log",
+      "SecAuditLogDirMode 0766",
+      "SecAuditLogFileMode 0666",
+      "SecAuditLogType Serial",
+      "SecAuditLogRelevantStatus \"^(?:5|4(?!04))\""
+    ]
+  },
+  {
+    "enabled": 1,
+    "version_min": 300000,
+    "version_max": 0,
+    "title": "auditlog : rule chain, multiMatch data, match only after intermediate transform",
+    "client": {
+      "ip": "200.249.12.31",
+      "port": 2313
+    },
+    "server": {
+      "ip": "200.249.12.31",
+      "port": 80
+    },
+    "request": {
+      "headers": {
+        "Host": "www.modsecurity.org",
+        "User-Agent": "Mozilla\/5.0 (Windows; U; Windows NT 6.1; en-US; rv:1.9.1.5) Gecko\/20091102 Firefox\/3.5.5 (.NET CLR 3.5.30729)",
+        "Accept": "text\/html,application\/xhtml+xml,application\/xml;q=0.9,*\/*;q=0.8",
+        "Accept-Language": "en-us,en;q=0.5",
+        "Accept-Encoding": "gzip,deflate",
+        "Accept-Charset": "ISO-8859-1,utf-8;q=0.7,*;q=0.7",
+        "Keep-Alive": "300",
+        "Connection": "keep-alive",
+        "Pragma": "no-cache",
+        "Cache-Control": "no-cache"
+      },
+      "uri": "\/test.pl?param1=test&param2=%20tEst2",
+      "method": "GET",
+      "http_version": 1.1,
+      "body": ""
+    },
+    "expected": {
+      "audit_log": "\\[msg \"testmsg\"\\] \\[data \"testdata\"\\] \\[severity \"7\"\\] \\[ver \"\"\\] \\[maturity \"0\"\\] \\[accuracy \"0\"\\] \\[tag \"testtag1\"\\] \\[tag \"testtag2\"\\]",
+      "error_log": "",
+      "http_code": 403
+    },
+    "rules": [
+      "SecRuleEngine On",
+      "SecDefaultAction \"phase:1,nolog,auditlog,deny,status:403\"",
+      "SecRule ARGS \"@streq tEst2\" \"id:1560,phase:1,multiMatch,block,log,t:none,t:trim,t:lowercase,msg:'testmsg',logdata:'testdata',severity:'DEBUG',tag:'testtag1',tag:'testtag2',chain\"",
+      "SecRule REQUEST_METHOD \"@streq GET\" \"t:none\"",
+      "SecAuditEngine RelevantOnly",
+      "SecAuditLogParts ABCFHZ",
+      "SecAuditLog /tmp/test/modsec_audit_multimatch_4.log",
+      "SecAuditLogDirMode 0766",
+      "SecAuditLogFileMode 0666",
+      "SecAuditLogType Serial",
+      "SecAuditLogRelevantStatus \"^(?:5|4(?!04))\""
+    ]
   }
 ]