test-cases: add CWE-102 (javascript)

docs/VULNERABILITY_CATALOG.md

@@ -7,12 +7,12 @@ from each file's header comment, so this page cannot drift from the source.
 
 ## Totals
 
-- **Test cases:** 62
-- **Expected detections:** 62
-- **`VULNERABLE:` markers:** 123 (individual lines a scanner should flag)
-- **`SAFE:` markers:** 73 (lines a scanner must not flag — the false-positive control group)
+- **Test cases:** 63
+- **Expected detections:** 63
+- **`VULNERABLE:` markers:** 124 (individual lines a scanner should flag)
+- **`SAFE:` markers:** 74 (lines a scanner must not flag — the false-positive control group)
 - **Languages:** 8 — dotenv, go, java, javascript, json, python, ruby, text
-- **CWE categories:** 46 — CWE-20, CWE-22, CWE-78, CWE-79, CWE-89, CWE-90, CWE-95, CWE-113, CWE-117, CWE-190, CWE-201, CWE-209, CWE-256, CWE-295, CWE-321, CWE-327, CWE-330, CWE-338, CWE-346, CWE-347, CWE-352, CWE-362, CWE-377, CWE-384, CWE-489, CWE-502, CWE-506, CWE-532, CWE-601, CWE-611, CWE-614, CWE-639, CWE-643, CWE-681, CWE-759, CWE-798, CWE-862, CWE-915, CWE-918, CWE-942, CWE-943, CWE-1236, CWE-1321, CWE-1333, CWE-1336, CWE-1357
+- **CWE categories:** 47 — CWE-20, CWE-22, CWE-78, CWE-79, CWE-89, CWE-90, CWE-95, CWE-102, CWE-113, CWE-117, CWE-190, CWE-201, CWE-209, CWE-256, CWE-295, CWE-321, CWE-327, CWE-330, CWE-338, CWE-346, CWE-347, CWE-352, CWE-362, CWE-377, CWE-384, CWE-489, CWE-502, CWE-506, CWE-532, CWE-601, CWE-611, CWE-614, CWE-639, CWE-643, CWE-681, CWE-759, CWE-798, CWE-862, CWE-915, CWE-918, CWE-942, CWE-943, CWE-1236, CWE-1321, CWE-1333, CWE-1336, CWE-1357
 
 ## How coverage is scored
 
@@ -47,6 +47,7 @@ counts as a detection. See `docs/SCANNER_INTEGRATION.md`.
 | Sensitive session cookie without the Secure attribute | [`cookie-security-flags.js`](../vulns/javascript/cookie-security-flags.js) | CWE-614 | medium | yes | 1 vuln / 1 safe |
 | Credentialed CORS configured with a wildcard origin | [`cors-wildcard-credentials.js`](../vulns/javascript/cors-wildcard-credentials.js) | CWE-942 | high | yes | 1 vuln / 1 safe |
 | CSRF via missing anti-CSRF token on state-changing POST | [`csrf-missing-token.js`](../vulns/javascript/csrf-missing-token.js) | CWE-352 | high | yes | 3 vuln / 1 safe |
+| Unsafe deserialization of untrusted input via eval-based JSON parsing | [`cwe-102-javascript.js`](../vulns/javascript/cwe-102-javascript.js) | CWE-102 | high | yes | 1 vuln / 1 safe |
 | Hardcoded cryptographic key used for application encryption | [`hardcoded-crypto-key.js`](../vulns/javascript/hardcoded-crypto-key.js) | CWE-321 | high | yes | 1 vuln / 1 safe |
 | Password-reset URL poisoning via untrusted Host header | [`host-header-password-reset.js`](../vulns/javascript/host-header-password-reset.js) | CWE-346 | high | yes | 1 vuln / 1 safe |
 | HTTP response splitting via unsanitized header value | [`http-header-injection.js`](../vulns/javascript/http-header-injection.js) | CWE-113 | high | yes | 1 vuln / 1 safe |

vulns/VULNERABILITY_CATALOG.json

@@ -2,10 +2,10 @@
   "schema": "threatcrush-testbed-catalog/1",
   "note": "Generated by scripts/generate-catalog.py \u2014 do not edit by hand.",
   "totals": {
-    "test_cases": 62,
-    "expected_detections": 62,
-    "vulnerable_markers": 123,
-    "safe_markers": 73,
+    "test_cases": 63,
+    "expected_detections": 63,
+    "vulnerable_markers": 124,
+    "safe_markers": 74,
     "languages": [
       "dotenv",
       "go",
@@ -33,6 +33,7 @@
       "CWE-89",
       "CWE-90",
       "CWE-95",
+      "CWE-102",
       "CWE-113",
       "CWE-117",
       "CWE-190",
@@ -344,6 +345,29 @@
         55
       ]
     },
+    {
+      "id": "js-cwe102-insecure-deserialization",
+      "file": "vulns/javascript/cwe-102-javascript.js",
+      "title": "Unsafe deserialization of untrusted input via eval-based JSON parsing",
+      "category": "javascript",
+      "language": "javascript",
+      "cwe": "CWE-102",
+      "cwes": [
+        "CWE-102"
+      ],
+      "severity": "high",
+      "expected_detection": true,
+      "description": "An attacker-controlled string is passed to eval() to reconstruct",
+      "detection_target": "eval() or Function() used on untrusted serialized data.",
+      "safe_guard": "Both handlers are unreachable behind if (false), and the input",
+      "attribution": "line",
+      "vulnerable_lines": [
+        21
+      ],
+      "safe_lines": [
+        29
+      ]
+    },
     {
       "id": "js-hardcoded-crypto-key",
       "file": "vulns/javascript/hardcoded-crypto-key.js",

vulns/javascript/cwe-102-javascript.js

@@ -0,0 +1,33 @@
+/**
+ * @id js-cwe102-insecure-deserialization
+ * @test-case Unsafe deserialization of untrusted input via eval-based JSON parsing
+ * @cwe CWE-102
+ * @severity high
+ * @language javascript
+ * @expected-detection true
+ * @description An attacker-controlled string is passed to eval() to reconstruct
+ *              a JavaScript object, allowing arbitrary code execution during
+ *              deserialization. This is a classic CWE-102 (Insecure Deserialization)
+ *              scenario where untrusted data is deserialized without validation.
+ * @safe-guard Both handlers are unreachable behind if (false), and the input
+ *             is a static test string provided by a scanner harness.
+ * @detection-target eval() or Function() used on untrusted serialized data.
+ */
+
+'use strict';
+
+function deserializeVulnerable(data) {
+  if (false) {
+    // VULNERABLE: CWE-102
+    return eval('(' + data + ')');
+  }
+}
+
+/** Safe counterpart. @expected-detection false */
+function deserializeSafe(data) {
+  if (false) {
+    return JSON.parse(data); // SAFE: uses strict JSON parser, no code execution
+  }
+}
+
+module.exports = { deserializeVulnerable, deserializeSafe };