[SA] Zyxel Security Advisory - security advisory for buffer overflow vulnerabilityin some 5G NR CPE, DSL/Ethernet CPE, fiber ONT, WiFi extender, and securityrouter devices

CVE: CVE-2024-5412

Summary

Zyxel has released patches for some 5G NR/4G LTE CPE, DSL/Ethernet CPE, fiber ONT, WiFi extender, and security router devices affected by a buffer overflow vulnerability. Users are advised to install them for optimal protection.

What is the vulnerability?

The buffer overflow vulnerability in the library "libclinkc" of some 5G NR/4G LTE CPE, DSL/Ethernet CPE, fiber ONT, WiFi extender, and security router devices could allow an unauthenticated attacker to cause denial of service (DoS)conditions by sending a crafted HTTP request to a vulnerable device.

What versions are vulnerable—and what should you do?

After a thorough investigation, we’ve identified the vulnerable products that are within their vulnerability support period and released patches to address the vulnerabilities,as shown in the tables below.

*Please reach out to your local Zyxel support team for the file.

**Updated by cloud

Please note that the tables do NOT include customized models for internet service providers (ISPs).

For ISPs, please contact your Zyxel sales or service representatives for further details.

For end-users who received your Zyxel device from an ISP, were commend you reach out to the ISP’s support team directly, as the device may have custom-built settings.

For end-users who purchased your Zyxel device yourself, please contact your local Zyxel support team for the new firmware file to ensure optimal protection, or visit Zyxel’s Community for further assistance.

Got a question?

Please contact your local service rep or visit Zyxel’s Community for further information or assistance.

Acknowledgement

Thanks to Dawid Kulikowski for reporting the issue to us.

Revision history

2024-9-3:Initial release.