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CVE-2019-9950

Critical

Description

Western Digital My Cloud, My Cloud Mirror Gen2, My Cloud EX2 Ultra, My Cloud EX2100, My Cloud EX4100, My Cloud DL2100, My Cloud DL4100, My Cloud PR2100 and My Cloud PR4100 firmware before 2.31.174 is affected by an authentication bypass vulnerability. The login_mgr.cgi file checks credentials against /etc/shadow. However, the "nobody" account (which can be used to access the control panel API as a low-privilege logged-in user) has a default empty password, allowing an attacker to modify the My Cloud EX2 Ultra web page source code and obtain access to the My Cloud as a non-Admin My Cloud device user.

SeverityCritical
CVSS9.8
Exploit probability—
ProductWesterndigital My Cloud Firmware
PublishedApr 24, 2019
First seenApr 24, 2019

How to fix

Update
  • westerndigital my_cloud_firmware2.31.174 or later
  • westerndigital my_cloud_mirror_gen2_firmware2.31.174 or later
  • westerndigital my_cloud_ex2_ultra_firmware2.31.174 or later
  • westerndigital my_cloud_ex2100_firmware2.31.174 or later
  • westerndigital my_cloud_ex4100_firmware2.31.174 or later
  • westerndigital my_cloud_dl2100_firmware2.31.174 or later
  • westerndigital my_cloud_dl4100_firmware2.31.174 or later
  • westerndigital my_cloud_pr2100_firmware2.31.174 or later
  • westerndigital my_cloud_pr4100_firmware2.31.174 or later

Affected products

ProductAffected versionsFixed in
westerndigital my_cloud_firmwarev < 2.31.1742.31.174
westerndigital my_cloud_mirror_gen2_firmwarev < 2.31.1742.31.174
westerndigital my_cloud_ex2_ultra_firmwarev < 2.31.1742.31.174
westerndigital my_cloud_ex2100_firmwarev < 2.31.1742.31.174
westerndigital my_cloud_ex4100_firmwarev < 2.31.1742.31.174
westerndigital my_cloud_dl2100_firmwarev < 2.31.1742.31.174
westerndigital my_cloud_dl4100_firmwarev < 2.31.1742.31.174
westerndigital my_cloud_pr2100_firmwarev < 2.31.1742.31.174
westerndigital my_cloud_pr4100_firmwarev < 2.31.1742.31.174

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