OS Command Injection in multiple Zyxel devices



Published: 2022-05-13
Risk High
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2022-30525
CWE-ID CWE-78
Exploitation vector Network
Public exploit Vulnerability #1 is being exploited in the wild.
Vulnerable software
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USG FLEX 100W
Hardware solutions / Firmware

USG FLEX 200
Hardware solutions / Firmware

USG FLEX 500
Hardware solutions / Firmware

USG FLEX 700
Hardware solutions / Firmware

USG FLEX 50W
Hardware solutions / Firmware

USG20W-VPN
Hardware solutions / Firmware

ATP series
Hardware solutions / Routers for home users

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

Vendor ZyXEL Communications Corp.

Security Bulletin

This security bulletin contains one high risk vulnerability.

1) OS Command Injection

EUVDB-ID: #VU63145

Risk: High

CVSSv3.1: 9.4 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:H/RL:O/RC:C]

CVE-ID: CVE-2022-30525

CWE-ID: CWE-78 - Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')

Exploit availability: Yes

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 CGI program. A remote unauthenticated 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

USG FLEX 100W: 5.00 - 5.21 Patch 1

USG FLEX 200: 5.00 - 5.21 Patch 1

USG FLEX 500: 5.00 - 5.21 Patch 1

USG FLEX 700: 5.00 - 5.21 Patch 1

USG FLEX 50W: 5.10 - 5.21 Patch 1

USG20W-VPN: 5.10 - 5.21 Patch 1

ATP series: 5.10 - 5.21 Patch 1

VPN series: 4.60 - 5.21 Patch 1


CPE2.3 External links

http://www.zyxel.com/support/Zyxel-security-advisory-for-OS-command-injection-vulnerability-of-firewalls.shtml

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?

Yes. This vulnerability is being exploited in the wild.



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