Zyxel security advisory for local privilege escalation and authenticated directory traversal vulnerabilities of firewalls CVE-2022-30526, CVE-2022-2030

Zyxel security advisory for local privilege escalation and authenticated directory traversal vulnerabilities of firewalls

CVE: CVE-2022-30526, CVE-2022-2030

Summary

Zyxel has released patches for products affected by local privilege escalation and authenticated directory traversal vulnerabilities. Users are advised to install them for optimal protection.

What are the vulnerabilities?

CVE-2022-30526

A privilege escalation vulnerability was identified in the CLI command of some firewall versions that could allow a local attacker to execute some OS commands with root privileges in some directories on a vulnerable device.

CVE-2022-2030

An authenticated directory traversal vulnerability caused by specific character sequences within an improperly sanitized URL was identified in some CGI programs of some firewall versions.

What versions are vulnerable—and what should you do?

After a thorough investigation, we’ve identified the vulnerable products for CVE-2022-30526 and CVE-2022-2030 that are within their vulnerability support period, with their firmware patches shown in the table below.

Got a question?

Please open a Support case, and we will assist you. Open Now!

Acknowledgment

Thanks to the following security consultancies for reporting the issues to us:

• Rapid7 for CVE-2022-30526
• Maurizio Agazzini (HN Security) in collaboration with SSD Secure Disclosure for CVE-2022-2030

Revision history

2022-07-19: Initial release