#VU14300 OS command injection in Crestron Electronics products - CVE-2018-11228

Vulnerability identifier: #VU14300

Vulnerability risk: High

CVSSv4.0: 8.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P/U:Amber]

CVE-ID: CVE-2018-11228

CWE-ID: CWE-78

Exploitation vector: Network

Exploit availability: Yes

Vulnerable software:
TSW-560-NC
Hardware solutions / Firmware
TSW-760-NC
Hardware solutions / Firmware
TSW-1060-NC
Hardware solutions / Firmware
TSW-560
Hardware solutions / Firmware
TSW-760
Hardware solutions / Firmware
TSW-1060
Hardware solutions / Firmware

Vendor: Crestron Electronics

Description

The vulnerability allows a remote attacker to execute arbitrary shell commands on the target system.

The vulnerability exists due to insufficient validation of user-supplied input. A remote unauthenticated attacker can submit a specially crafted input via a Bash shell service in Crestron Toolbox Protocol (CTP) and execute arbitrary code with elevated privileges.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Mitigation
Update the affected software to version 2.001.0037.001.

Vulnerable software versions

TSW-560-NC: before 2.001.0037.001

TSW-760-NC: before 2.001.0037.001

TSW-1060-NC: before 2.001.0037.001

TSW-560: before 2.001.0037.001

TSW-760: before 2.001.0037.001

TSW-1060: before 2.001.0037.001

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External links
https://ics-cert.us-cert.gov/advisories/ICSA-18-221-01

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability. However, proof of concept for this vulnerability is available.