OS Command Injection in Zyxel firewalls



Published: 2023-02-07
Risk Medium
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2022-38547
CWE-ID CWE-78
Exploitation vector Network
Public exploit N/A
Vulnerable software
Subscribe 		ATP series
Hardware solutions / Routers for home users

USG FLEX series
Client/Desktop applications / Antivirus software/Personal firewalls

VPN series
Client/Desktop applications / Antivirus software/Personal firewalls

USG series
Client/Desktop applications / Antivirus software/Personal firewalls

ZyWALL
Other software / Other software solutions

Vendor ZyXEL Communications Corp.

Security Bulletin

This security bulletin contains one medium risk vulnerability.

1) OS Command Injection

EUVDB-ID: #VU71972

Risk: Medium

CVSSv3.1:

CVE-ID: CVE-2022-38547

CWE-ID:

Exploit availability:

Description

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

The vulnerability exists due to improper input validation. A remote user 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

ATP series: 4.32 - 5.32

USG FLEX series: 4.50 - 5.32

VPN series: 4.30 - 5.32

ZyWALL: 4.20 - 4.72

USG series: 4.20 - 4.72

Fixed software versions

CPE2.3 External links

http://www.zyxel.com/global/en/support/security-advisories/zyxel-security-advisory-for-post-authentication-rce-in-firewalls


Q & A

Can this vulnerability be exploited remotely?

How the attacker can exploit this vulnerability?

Is there known malware, which exploits this vulnerability?



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