CVE-2023-29357

Author: buixor

.appsec-tests/vpatch-CVE-2023-29357/CVE-2023-29357.yaml

@@ -0,0 +1,21 @@
+id: CVE-2023-29357
+info:
+  name: CVE-2023-29357
+  author: crowdsec
+  severity: info
+  description: CVE-2023-29357 testing
+  tags: appsec-testing
+http:
+  - raw:
+      - |
+        GET /_api/web/siteusers HTTP/1.1
+        Host: {{Hostname}}
+        Accept: application/json
+        Authorization: Bearer eyJhbGciOiJub25lIiwidHlwIjoiSldUIn0.eyJhdWQiOiIwMDAwMDAwMy0wMDAwLTBmZjEtY2UwMC0wMDAwMDAwMDAwMDBAcmVhbG0iLCJpc3MiOiIwMDAwMDAwMy0wMDAwLTBmZjEtY2UwMC0wMDAwMDAwMDAwMDAiLCJuYmYiOjE2OTU5ODc3MDMsImV4cCI6MjAxMTU0NzIyMywidmVyIjoiaGFzaGVkcHJvb2Z0b2tlbiIsIm5hbWVpZCI6IjAwMDAwMDAzLTAwMDAtMGZmMS1jZTAwLTAwMDAwMDAwMDAwMEByZWFsbSIsImVuZHBvaW50dXJsIjoicXFsQUptVHhwQjlBNjd4U3laayJ9.AAA
+        X-PROOF_TOKEN: eyJhbGciOiJub25lIn0.eyJ2ZXIiOiJoYXNoZWRwcm9vZnRva2VuIn0.AAA
+
+    cookie-reuse: true
+    matchers:
+      - type: status
+        status:
+          - 403

.appsec-tests/vpatch-CVE-2023-29357/config.yaml

@@ -0,0 +1,4 @@
+appsec-rules:
+  - ./appsec-rules/crowdsecurity/base-config.yaml
+  - ./appsec-rules/crowdsecurity/vpatch-CVE-2023-29357.yaml
+nuclei_template: CVE-2023-29357.yaml

appsec-rules/crowdsecurity/vpatch-CVE-2023-29357.yaml

@@ -0,0 +1,33 @@
+name: crowdsecurity/vpatch-CVE-2023-29357
+description: 'Detects Microsoft SharePoint authentication bypass via forged JWT tokens with "none" algorithm (CVE-2023-29357)'
+rules:
+  - and:
+      - zones:
+          - URI
+        transform:
+          - lowercase
+          - urldecode
+        match:
+          type: contains
+          value: '/_api/'
+      - zones:
+          - HEADERS
+        variables:
+          - Authorization
+        transform:
+          - lowercase
+        match:
+          type: contains
+          value: 'hashedprooftoken'
+
+labels:
+  type: exploit
+  service: http
+  confidence: 3
+  spoofable: 0
+  behavior: 'http:exploit'
+  label: 'Microsoft SharePoint Server - Authentication Bypass'
+  classification:
+    - cve.CVE-2023-29357
+    - attack.T1190
+    - cwe.CWE-290

collections/crowdsecurity/appsec-virtual-patching.yaml

@@ -42,6 +42,7 @@ appsec-rules:
 - crowdsecurity/vpatch-CVE-2023-46805
 - crowdsecurity/vpatch-CVE-2024-23897
 - crowdsecurity/vpatch-CVE-2023-22527
+- crowdsecurity/vpatch-CVE-2023-29357
 - crowdsecurity/vpatch-CVE-2024-5057
 - crowdsecurity/vpatch-CVE-2023-35078
 - crowdsecurity/vpatch-CVE-2023-35082