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Zyxel Patches Crucial Vulnerability in NAS Firmware

By Ionut Arghire on September 07, 2022

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Networking options supplier Zyxel has launched patches for a critical-severity vulnerability impacting the firmware of a number of community hooked up storage (NAS) machine fashions.

The safety defect, tracked as CVE-2022-34747, carries a CVSS rating of 9.8/10 and is publicly documented as a format string vulnerability impacting Zyxel NAS326 firmware variations previous to V5.21(AAZF.12)C0.

An attacker may exploit the vulnerability by sending specifically crafted UDP packets to the affected merchandise. Profitable exploitation of the bug may enable an attacker to execute arbitrary code on the impacted machine, the corporate stated in an advisory.

“A format string vulnerability was present in a selected binary of Zyxel NAS merchandise that would enable an attacker to attain unauthorized distant code execution through a crafted UDP packet,” the corporate added.

[ READ: QNAP Warns of New ‘Deadbolt’ Ransomware Assaults Focusing on NAS Customers ]

Zyxel says its investigationhas recognized solely three NAS fashions which are affected and that are inside their assist lifetime.

The seller silently patched the vulnerability in mid-August with firmware updates for NAS326, NAS540, and NAS542 machine fashions, however delayed publication of the flaw particulars till this week.

Zyxel credited safety researcher Shaposhnikov Ilya with reporting the vulnerability.

Zyxel’s advisory was printed solely days after QNAP warned of a brand new wave of Deadbolt ransomware assaults focusing on its NAS customers.

NAS gadgets – that are usually used for storing giant quantities of knowledge – are sometimes focused in ransomware assaults and distant code execution bugs in them may simply result in full machine compromise.

Beforehand, Zyxel NAD merchandise had been focused by a variant of the Mirai botnet, in assaults that exploited one other critical-severity vulnerability resulting in distant code execution.

Associated: Particulars Launched for Just lately Patched Zyxel Firewall Vulns

Associated: QNAP Warns of New ‘Deadbolt’ Ransomware Assaults Focusing on NAS Customers

Associated: Zyxel Patches Zero-Day Flaw in Community Storage Merchandise

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