#VU60350 OS Command Injection in TN-5900 - CVE-2021-46560

Vulnerability identifier: #VU60350

Vulnerability risk: Medium

CVSSv4.0: 6.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2021-46560

CWE-ID: CWE-78

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
TN-5900
Hardware solutions / Routers & switches, VoIP, GSM, etc

Vendor: Moxa

Description

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

The vulnerability exists due to improper input validation in the p12 processing code of the certificate management function web_CERMGMTUpload. A remote authenticated attacker can pass specially crafted data to the application and execute arbitrary OS commands on the target system.

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

Mitigation
Install updates from vendor's website.

Vulnerable software versions

TN-5900: 3.1.0

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External links
https://www.moxa.com/en/support/product-support/security-advisory/tn-5900-secure-routers-vulnerabilitiestxt

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.