Advisory Details

February 6th, 2024

(Pwn2Own) Western Digital MyCloud PR4100 RESTSDK Server-Side Request Forgery Vulnerability

ZDI-24-087
ZDI-CAN-22456

CVE ID CVE-2023-22817
CVSS SCORE 6.3, AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
AFFECTED VENDORS Western Digital
AFFECTED PRODUCTS MyCloud PR4100
VULNERABILITY DETAILS

This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of Western Digital MyCloud PR4100 NAS devices. Authentication is not required to exploit this vulnerability.

The specific flaw exists within the RESTSDK server. The issue results from the lack of proper validation of a URI prior to accessing resources. An attacker can leverage this in conjunction with other vulnerabilities to execute arbitrary code in the context of root.

ADDITIONAL DETAILS Western Digital has issued an update to correct this vulnerability. More details can be found at:
https://www.westerndigital.com/support/product-security/wdc-24001-western-digital-my-cloud-os-5-my-cloud-home-duo-and-sandisk-ibi-firmware-update
DISCLOSURE TIMELINE
  • 2023-11-09 - Vulnerability reported to vendor
  • 2024-02-06 - Coordinated public release of advisory
  • 2024-07-01 - Advisory Updated
CREDIT @_s_n_t of @pentestltd
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