#VU9873 Cross-site request forgery in WD My Cloud

Vulnerability identifier: #VU9873

Vulnerability risk: Medium

CVSSv4.0: 5.5 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:P/U:Green]

CVE-ID: N/A

CWE-ID: CWE-352

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
WD My Cloud
Hardware solutions / Office equipment, IP-phones, print servers

Vendor: Western Digital

Description
The vulnerability allows a remote attacker to perform CSRF attacks.

The vulnerability exists due to improper validation of the request origin when processing HTTP requests to "/web/dsdk/DsdkProxy.php" script. A remote attacker can create a specially crafted website, trick the victim into opening it and delete all files on the system.

Exploitation example:

 http://[host]/web/dsdk/DsdkProxy.php?;rm -rf /; 

Mitigation
Update to version 2.30.172.

Vulnerable software versions

WD My Cloud: 2.10.302 - 2.30.165

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External links
https://support.wdc.com/download/notes/WD_My_Cloud_Firmware_Release_Notes_2.30.172.pdf?v=987
https://gulftech.org/advisories/WDMyCloud%20Multiple%20Vulnerabilities/125

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability. However, proof of concept for this vulnerability is available.