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Monday, 08 January 2018 09:48

Remote holes found in several WD MyCloud devices

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A research firm has released details of vulnerabilities in some of Western Digital's MyCloud devices, after having waited in vain for the manufacturer to issue patches.

Among the flaws were unrestricted file upload, the ability to gain a remote root shell, a hard-coded backdoor and other miscellaneous vulnerabilities. There was no protection against cross-site request forgeries or command injection, while a denial-of-service attack was also possible.

James Bercegay of GulfTech Research and Development wrote that he had contacted Western Digital on 19 June to inform them of the vulnerabilities, and received confirmation of the receipt of his message three days later.

Thereafter, he said, the vendor had requested the standard 90 days before full disclosure. Bercegay waited until 15 December when he discovered that someone else had posted a detailed account of one of the bugs.

He said he had made his findings public on 3 January.

According to Bercegay, the following devices are affected: MyCloud, MyCloudMirror, My Cloud Gen 2, My Cloud PR2100, My Cloud PR4100, My Cloud EX2 Ultra, My Cloud EX2, My Cloud EX4, My Cloud EX2100, My Cloud EX4100, My Cloud DL2100 and My Cloud DL4100.

However, the MyCloud 04.X Series and MyCloud 2.30.174 were not vulnerable.

"WD My Cloud is a personal cloud storage unit to organise your photos and videos. It is currently the best selling NAS (network attached storage) device listed on the amazon.com website, and is used by individuals and businesses alike," he wrote.

"Its purpose is to host your files, and it also has the ability to sync them with various cloud and Web-based services."

Bercegay said he had uploaded Metasploit modules for the flaws outlined and these could be found online.

iTWire has contacted Western Digital for comment.

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Sam Varghese

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Sam Varghese has been writing for iTWire since 2006, a year after the site came into existence. For nearly a decade thereafter, he wrote mostly about free and open source software, based on his own use of this genre of software. Since May 2016, he has been writing across many areas of technology. He has been a journalist for nearly 40 years in India (Indian Express and Deccan Herald), the UAE (Khaleej Times) and Australia (Daily Commercial News (now defunct) and The Age). His personal blog is titled Irregular Expression.

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