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ABB Cylon Aspect 3.08.01 (jsonProxy.php) Unauthenticated Remote SSH Service Control

Medium
Advisory ID
ZSL-2024-5857
Release Date
30 October 2024
Vendor
Affected Version
NEXUS Series, MATRIX-2 Series, ASPECT-Enterprise, ASPECT-Studio, Firmware: <=3.08.01
CVE
N/A
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)
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

The jsonProxy.php endpoint on the ABB BMS/BAS controller is vulnerable to unauthorized SSH service configuration changes. An unauthenticated attacker can enable or disable the SSH service on the server by accessing the FTControlServlet with the sshenable parameter. The jsonProxy.php script proxies requests to localhost without enforcing authentication, allowing attackers to modify SSH settings and potentially gain further unauthorized access to the system.

Proof of Concept
Disclosure Timeline
21.04.2024Vulnerability discovered.
22.04.2024Vendor contacted.
22.04.2024Vendor responds.
02.05.2024Working with the vendor.
07.08.2024Vendor released version 3.08.02 to address this issue.
30.10.2024Public security advisory released.
Credits
Vulnerability discovered by Gjoko Krstic
References
Changelog
30.10.2024Initial release