Data Storage Company Western Digital To Purchase Sandisk For 19 Billion
A security researcher has published details of a vulnerability in a
popular cloud storage drive after the company failed to issue security
patches for over a year.
Remco Vermeulen found a privilege escalation bug in Western Digital’s My
Cloud devices, which he said allows an attacker to bypass the admin
password on the drive, gaining “complete control” over the user’s data.

The exploit works because drive’s web-based dashboard doesn’t properly
check a user’s credentials before giving a possible attacker access to
tools that should require higher levels of access.
The bug was “easy” to exploit, Vermeulen told TechCrunch in an email,
and was remotely exploitable if a My Cloud device allows remote access
over the internet — which thousands of devices do. He posted a
proof-of-concept video on Twitter.
Details of the bug were also independently found by another security team, which released its own exploit code.
Vermeulen reported the bug over a year ago, in April 2017, but said the
company stopped responding. Normally, security researchers give 90 days
for a company to respond, in line with industry-accepted responsible
disclosure guidelines.
After he found that WD updated the My Cloud firmware in the meanwhile
without fixing the vulnerability he found, he decided to post his
findings.
A year later, WD still hasn’t released a patch.
The company confirmed that it knows of the vulnerability but did not say
why it took more than a year to issue a fix. “We are in the process of
finalizing a scheduled firmware update that will resolve the reported
issue,” a spokesperson said, which will arrive “within a few weeks.”
WD said that several of its My Cloud products are vulnerable — including the EX2, EX4 and Mirror, but not My Cloud Home.
In the meantime, Vermeulen said that there’s no fix and that users have
to “just disconnect” the drive altogether if they want to keep their
data safe.
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