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ABB Cylon Aspect 3.07.02 (sshUpdate.php) Unauthenticated Remote SSH Service Control

Medium
Advisory ID
ZSL-2024-5838
Release Date
10 October 2024
Vendor
Affected Version
NEXUS Series, MATRIX-2 Series, ASPECT-Enterprise, ASPECT-Studio, Firmware: <=3.07.02
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 BMS/BAS controller suffers from a vulnerability that allows an unauthenticated attacker to enable or disable the SSH daemon by sending a POST request to sshUpdate.php with a simple JSON payload. This can be exploited to start the SSH service on the remote host without proper authentication, potentially enabling unauthorized access or stop and deny service access.

Proof of Concept
Disclosure Timeline
21.04.2024Vulnerability discovered.
22.04.2024Vendor contacted.
22.04.2024Vendor responds.
02.05.2024Working with the vendor.
18.10.2023Vendor released version 3.08.00 to address this issue.
10.10.2024Public security advisory released.
Credits
Vulnerability discovered by Gjoko Krstic
References
Changelog
10.10.2024Initial release
12.10.2024Added reference [1]
23.10.2024Added reference [2]