Fix Contrast parser collapsing findings with the same rule name (#14714)

* updated contrast parser and added new unittests and scan files

* Fix path assertion in test to be environment-independent

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

* Use unique_id_from_tool directly as dupe_key in Contrast parser

No need to SHA256-hash a string that is already a usable dict key.
Aligns with the dominant pattern across parsers that use the tool's
native ID directly rather than computing a hash of it.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

---------

Co-authored-by: Claude Sonnet 4.6 <noreply@anthropic.com>

Author: Jino-T

dojo/tools/contrast/parser.py

@@ -1,6 +1,5 @@
 import csv
 import datetime
-import hashlib
 import io
 import sys
 
@@ -89,9 +88,7 @@ def get_findings(self, filename, test):
                     },
                 )
 
-            dupe_key = hashlib.sha256(
-                f"{finding.vuln_id_from_tool}".encode(),
-            ).digest()
+            dupe_key = finding.unique_id_from_tool
 
             if dupe_key in dupes:
                 dupes[dupe_key].description = (

unittests/scans/contrast/ldap-multiple.csv

@@ -0,0 +1,4 @@
+Vulnerability Name,Vulnerability ID,Category,Rule Name,Severity,Status,Number of Events,First Seen,First Seen Datetime,Last Seen,Last Seen Datetime,Application Name,Application ID,Application Code,CWE ID,Request Method,Request Port,Request Protocol,Request Version,Request URI,Request Qs,Request Body
+LDAP Injection from "username" Parameter,AAAA-1111-BBBB-2222,Injection,ldap-injection,High,Reported,1,1590144840000,2020-05-22T10:54:00.000Z,1600686000000,2020-09-21T11:00:00.000Z,my-app,app-id-001,,https://cwe.mitre.org/data/definitions/90.html,GET,8080,http,HTTP/1.1,/login,,
+LDAP Injection from "group" Parameter,CCCC-3333-DDDD-4444,Injection,ldap-injection,High,Reported,1,1590144840000,2020-05-22T10:54:00.000Z,1600686000000,2020-09-21T11:00:00.000Z,my-app,app-id-001,,https://cwe.mitre.org/data/definitions/90.html,GET,8080,http,HTTP/1.1,/admin,,
+LDAP Injection from "filter" Parameter,EEEE-5555-FFFF-6666,Injection,ldap-injection,High,Reported,1,1590144840000,2020-05-22T10:54:00.000Z,1600686000000,2020-09-21T11:00:00.000Z,my-app,app-id-001,,https://cwe.mitre.org/data/definitions/90.html,POST,8080,http,HTTP/1.1,/api/users,,

unittests/scans/contrast/path-traversal-duplicate-vuln-id.csv

@@ -0,0 +1,3 @@
+Vulnerability Name,Vulnerability ID,Category,Rule Name,Severity,Status,Number of Events,First Seen,First Seen Datetime,Last Seen,Last Seen Datetime,Application Name,Application ID,Application Code,CWE ID,Request Method,Request Port,Request Protocol,Request Version,Request URI,Request Qs,Request Body
+Path Traversal from "file" Parameter,AAAA-1111-BBBB-2222,Injection,path-traversal,High,Reported,1,1590144840000,2020-05-22T10:54:00.000Z,1600686000000,2020-09-21T11:00:00.000Z,my-app,app-id-001,,https://cwe.mitre.org/data/definitions/22.html,GET,8080,http,HTTP/1.1,/download,,
+Path Traversal from "file" Parameter,AAAA-1111-BBBB-2222,Injection,path-traversal,High,Reported,1,1590144840000,2020-05-22T10:54:00.000Z,1600686000000,2020-09-21T11:00:00.000Z,my-app,app-id-001,,https://cwe.mitre.org/data/definitions/22.html,GET,8080,http,HTTP/1.1,/upload,,

unittests/tools/test_contrast_parser.py

@@ -15,7 +15,7 @@ def test_example_report(self):
             parser = ContrastParser()
             findings = parser.get_findings(testfile, test)
             self.validate_locations(findings)
-            self.assertEqual(18, len(findings))
+            self.assertEqual(52, len(findings))
             with self.subTest(i=0):
                 finding = findings[0]
                 self.assertEqual("Info", finding.severity)
@@ -30,25 +30,36 @@ def test_example_report(self):
                 self.assertEqual("http", location.protocol)
                 self.assertEqual("0.0.0.0", location.host)  # noqa: S104
                 self.assertEqual("WebGoat/login.mvc", location.path)
-            with self.subTest(i=11):
-                finding = findings[11]
-                self.assertEqual(datetime.date(2018, 4, 23), finding.date.date())
+
+    def test_ldap_multiple_findings(self):
+        test = Test()
+        test.engagement = Engagement()
+        test.engagement.product = Product()
+        with (get_unit_tests_scans_path("contrast") / "ldap-multiple.csv").open(encoding="utf-8") as testfile:
+            parser = ContrastParser()
+            findings = parser.get_findings(testfile, test)
+            self.assertEqual(3, len(findings))
+            vuln_ids = [f.unique_id_from_tool for f in findings]
+            self.assertEqual(len(vuln_ids), len(set(vuln_ids)), "Each finding should have a distinct unique_id_from_tool")
+            for finding in findings:
+                self.assertEqual("ldap-injection", finding.vuln_id_from_tool)
                 self.assertEqual("High", finding.severity)
-                self.assertEqual("path-traversal", finding.vuln_id_from_tool)
-                self.assertIsNone(finding.unique_id_from_tool)  # aggregated finding
-                self.assertEqual(4, finding.nb_occurences)
-                self.assertEqual(22, finding.cwe)
-                # endpoints
-                self.assertIsNotNone(self.get_unsaved_locations(finding))
-                self.assertEqual(4, len(self.get_unsaved_locations(finding)))
-                location = self.get_unsaved_locations(finding)[0]
-                self.assertEqual("http", location.protocol)
-                self.assertEqual("0.0.0.0", location.host)  # noqa: S104
-                self.assertEqual("WebGoat/services/SoapRequest", location.path)
-                location = self.get_unsaved_locations(finding)[1]
-                self.assertEqual("http", location.protocol)
-                self.assertEqual("0.0.0.0", location.host)  # noqa: S104
-                self.assertEqual("WebGoat/attack", location.path)
+                self.assertIsNotNone(finding.unique_id_from_tool)
+
+    def test_duplicate_vuln_id_is_merged(self):
+        test = Test()
+        test.engagement = Engagement()
+        test.engagement.product = Product()
+        with (get_unit_tests_scans_path("contrast") / "path-traversal-duplicate-vuln-id.csv").open(encoding="utf-8") as testfile:
+            parser = ContrastParser()
+            findings = parser.get_findings(testfile, test)
+            self.assertEqual(1, len(findings))
+            finding = findings[0]
+            self.assertEqual("path-traversal", finding.vuln_id_from_tool)
+            self.assertIsNone(finding.unique_id_from_tool)
+            self.assertEqual(2, finding.nb_occurences)
+            self.assertEqual(22, finding.cwe)
+            self.assertEqual(2, len(self.get_unsaved_locations(finding)))
 
     def test_example2_report(self):
         test = Test()