Western Digital customers urged to update to latest version of My Cloud OS

(Image credit: Shutterstock) (Image credit: Shutterstock)

Western Digital has pushed a new firmware update for its My Cloud OS, fixing a high- severity vulnerability that was discovered during a recent hacking contest.

As reported by BleepingComputer, cybersecurity experts from the NCC Group exploited a flaw in Netatalk Service, an open-source implementation of the Apple Filing Protocol (AFP) that allows for Unix-like operating systems to serve as file servers for macOS clients.

The flaw, now tracked as CVE-2022-23121, carries a severity score of 9.8/10, as it allows threat actors to run any code on the target endpoint, without authentication.

Removing Netatalk

“The specific flaw exists within the parse_entries function. The issue results from the lack of proper error handling when parsing AppleDouble entries,” the Zero Day Initiative advisory reads. “An attacker can leverage this vulnerability to execute code in the context of root.”

As a result, Western Digital pulled the Netatalk service completely from the My Cloud OS, starting with firmware version 5.19.117, and has advised all WD NAS users to update their endpoints to this version.

These are the devices considered vulnerable to the exploit:

My Cloud PR2100
My Cloud PR4100
My Cloud EX2 Ultra
My Cloud EX 4100
My Cloud Mirror Gen 2
My Cloud EX2100
My Cloud DL2100
My Cloud DL4100

> Western Digital desktop app exposes Windows and macOS users to attack

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WD NAS users who decide to update their devices to the latest version can no longer use the Netatalk service, but can continue accessing network shares via SMB.

The Netatalk development team didn’t sit idly, however. After the remote code execution bug was exploited in the contest, they pushed an update fixing CVE-2022-23121 and a number of other known vulnerabilities, some of which was classified as critical.

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Via BleepingComputer

Sead is a seasoned freelance journalist based in Sarajevo, Bosnia and Herzegovina. He writes about IT (cloud, IoT, 5G, VPN) and cybersecurity (ransomware, data breaches, laws and regulations). In his career, spanning more than a decade, he’s written for numerous media outlets, including Al Jazeera Balkans. He’s also held several modules on content writing for Represent Communications.