checkov: add null check (#12906)

Author: valentijnscholten

dojo/tools/checkov/parser.py

@@ -122,13 +122,14 @@ def get_item(vuln, test, check_type):
     if "description" in vuln:
         description += f"\n{vuln['description']}\n"
     mitigation = ""
-    if "benchmarks" in vuln:
+    if "benchmarks" in vuln and vuln["benchmarks"] is not None:
         bms = vuln["benchmarks"].keys()
         if len(bms) > 0:
             mitigation += "\nBenchmarks:\n"
             for bm in bms:
-                for gl in vuln["benchmarks"][bm]:
-                    mitigation += f"- {bm} # {gl['name']} : {gl['description']}\n"
+                if vuln["benchmarks"][bm] is not None:
+                    for gl in vuln["benchmarks"][bm]:
+                        mitigation += f"- {bm} # {gl['name']} : {gl['description']}\n"
 
     file_path = vuln.get("file_path", None)
     source_line = None