Emergency patches released for critical vulns impacting EOL Zyxel NAS boxes

Emergency patches released for critical vulns impacting EOL Zyxel NAS boxes

June 5, 2024 at 01:38PM

Zyxel released security patches for its obsolete NAS326 and NAS542 devices after critical vulnerabilities were reported by an intern at a security vendor. The vulnerabilities, including a backdoor account and code injection flaws, could lead to remote code execution and other issues. Patches are available despite the devices reaching end-of-life status.

Key takeaways from the meeting notes:

– Zyxel has released security fixes for two of its obsolete network-attached storage (NAS) devices, NAS326 and NAS542, after critical vulnerabilities were reported by an intern at a security vendor, Outpost24.
– The vulnerabilities could lead to remote code execution (RCE) and other issues and have received high CVSSv3 severity scores.
– The vulnerabilities include a backdoor account called “NsaRescueAngel,” a Python code injection flaw, and an RCE bug that achieves persistence.
– The critical flaws have been patched with new firmware versions V5.21(AAZF.17)C0 for NAS326 devices and V5.21(ABAG.14)C0 for NAS542 boxes.
– Two additional vulnerabilities, both privilege escalation flaws, have also been addressed with the new patches.
– It is unclear if the vulnerabilities have been exploited in the wild, but given the potential danger, it is important to apply the patches immediately.

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