Title: ABB Cylon Aspect 3.08.01 (jsonProxy.php) Unauthenticated Remote SSH Service Control
Advisory ID: ZSL-2024-5857
Type: Local/Remote
Impact: Security Bypass, DoS
Risk: (3/5)
Release Date: 30.10.2024

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.

Vendor

ABB Ltd. - https://www.global.abb

Affected Version

NEXUS Series, MATRIX-2 Series, ASPECT-Enterprise, ASPECT-Studio
Firmware: <=3.08.01

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)

Vendor Status

[21.04.2024] Vulnerability discovered.
[22.04.2024] Vendor contacted.
[22.04.2024] Vendor responds.
[02.05.2024] Working with the vendor.
[07.08.2024] Vendor released version 3.08.02 to address this issue.
[30.10.2024] Public security advisory released.

PoC

abb_aspect_ssh2.txt

Credits

Vulnerability discovered by Gjoko Krstic - <gjoko@zeroscience.mk>

References

[1] https://packetstormsecurity.com/files/182405/

Changelog

[30.10.2024] - Initial release

Contact

Zero Science Lab

Web: https://www.zeroscience.mk
e-mail: lab@zeroscience.mk