Zyxel security advisory for format string vulnerability in NAS
Ally Member
CVE: CVE-2022-34747
Summary
Zyxel has released patches for NAS products affected by a format string vulnerability. Users are advised to install them for optimal protection.
What is the vulnerability?
A format string vulnerability was found in a
specific binary of Zyxel NAS products that could allow an attacker to achieve unauthorized remote code execution via a crafted UDP packet.
What versions are vulnerable-and what should you do?
After a thorough investigation, we have identified the vulnerable products that are within their vulnerability support period, with their firmware patches shown in the table below.
|
Affected model |
Affected version |
Patch availability |
|
NAS326 |
V5.21(AAZF.11)C0 and earlier |
|
|
NAS540 |
V5.21(AATB.8)C0 and earlier |
|
|
NAS542 |
V5.21(ABAG.8)C0 and earlier |
Got a question?
Please contact your local service rep or visit Zyxel’s forum for further information or assistance.
Acknowledgment
Thanks to Shaposhnikov Ilya for reporting the issue to us.
Revision history
2022-09-06: Initial release.
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