Headline
ABB Cylon Aspect 3.08.03 (MIX->HTTPDownloadServlet) Remote Code Execution
ABB Cylon Aspect BMS/BAS is vulnerable to a critical flaw in the AuthenticatedHttpServlet within its application server, enabling remote attackers to bypass authentication by setting the Host: 127.0.0.1 header. This deceives the server into processing requests as if they originate from localhost, granting unauthorized access to privileged operations. This bypass grants access to privileged functionality, including the HTTPDownloadServlet, which is vulnerable to directory traversal. By leveraging this, an attacker can write arbitrary PHP files outside the intended directory scope. When combined, these issues allow remote attackers to upload a malicious PHP shell and execute system commands with the privileges of the web server, leading to full system compromise.
Title: ABB Cylon Aspect 3.08.03 (MIX->HTTPDownloadServlet) Remote Code Execution
Advisory ID: ZSL-2025-5940
Type: Local/Remote
Impact: Security Bypass, System Access, DoS
Risk: (5/5)
Release Date: 22.05.2025
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.
Description
ABB Cylon Aspect BMS/BAS is vulnerable to a critical flaw in the AuthenticatedHttpServlet within its application server, enabling remote attackers to bypass authentication by setting the Host: 127.0.0.1 header. This deceives the server into processing requests as if they originate from localhost, granting unauthorized access to privileged operations. This bypass grants access to privileged functionality, including the HTTPDownloadServlet, which is vulnerable to directory traversal. By leveraging this, an attacker can write arbitrary PHP files outside the intended directory scope. When combined, these issues allow remote attackers to upload a malicious PHP shell and execute system commands with the privileges of the web server, leading to full system compromise.
Vendor
ABB Ltd. - https://www.global.abb
Affected Version
NEXUS Series, MATRIX-2 Series, ASPECT-Enterprise, ASPECT-Studio
Firmware: <=3.08.03
Tested On
GNU/Linux 3.15.10 (armv7l)
GNU/Linux 3.10.0 (x86_64)
GNU/Linux 2.6.32 (x86_64)
Intel® Atom™ Processor E3930 @ 1.30GHz
Intel® Xeon® 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
Vendor Status
[21.04.2024] Vulnerability discovered.
[22.04.2024] Vendor contacted.
[22.04.2024] Vendor responds.
[02.05.2024] Working with the vendor.
[21.05.2025] No response from the vendor.
[22.05.2025] Public security advisory released.
PoC
MixExploitHDS.java
Credits
Vulnerability discovered by Gjoko Krstic - <[email protected]>
References
[1] https://packetstorm.news/files/id/194968/
Changelog
[22.05.2025] - Initial release
[26.05.2025] - Added reference [1]
Contact
Zero Science Lab
Web: https://www.zeroscience.mk
e-mail: [email protected]