critical
10
CWE
287
Advisory Published
Updated

CVE-2018-17153

First published: Tue Sep 18 2018(Updated: )

It was discovered that the Western Digital My Cloud device before 2.30.196 is affected by an authentication bypass vulnerability. An unauthenticated attacker can exploit this vulnerability to authenticate as an admin user without needing to provide a password, thereby gaining full control of the device. (Whenever an admin logs into My Cloud, a server-side session is created that is bound to the user's IP address. After the session is created, it is possible to call authenticated CGI modules by sending the cookie username=admin in the HTTP request. The invoked CGI will check if a valid session is present and bound to the user's IP address.) It was found that it is possible for an unauthenticated attacker to create a valid session without a login. The network_mgr.cgi CGI module contains a command called "cgi_get_ipv6" that starts an admin session -- tied to the IP address of the user making the request -- if the additional parameter "flag" with the value "1" is provided. Subsequent invocation of commands that would normally require admin privileges now succeed if an attacker sets the username=admin cookie.

Credit: cve@mitre.org cve@mitre.org

Affected SoftwareAffected VersionHow to fix
Western Digital My Cloud Wdbctl0020hwt Firmware<2.30.196
Western Digital My Cloud Wdbctl0020hwt
Western Digital My Cloud Pr4100<2.30.196
Western Digital My Cloud Pr4100
Western Digital My Cloud Pr2100 Firmware<2.30.196
Western Digital My Cloud Pr2100
Western Digital My Cloud Mirror Gen 2 Firmware<2.30.196
Western Digital My Cloud Mirror Gen 2
Western Digital My Cloud Mirror Firmware<2.30.196
Western Digital My Cloud Mirror
Western Digital My Cloud Ex4100<2.30.196
Western Digital My Cloud Ex4100
Western Digital My Cloud Ex4 Firmware<2.30.196
Western Digital My Cloud Ex4
Western Digital My Cloud Ex2100 Firmware<2.30.196
Western Digital My Cloud Ex2100
Western Digital My Cloud EX2 Ultra firmware<2.30.196
Western Digital My Cloud EX2 Ultra
Western Digital My Cloud Ex2 Firmware<2.30.196
Western Digital My Cloud Ex2
Western Digital My Cloud Dl4100 Firmware<2.30.196
Western Digital My Cloud Dl4100
Western Digital My Cloud Dl2100<2.30.196
Western Digital My Cloud Dl2100

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Reference Links

Frequently Asked Questions

  • What is CVE-2018-17153?

    CVE-2018-17153 is an authentication bypass vulnerability found in the Western Digital My Cloud device before version 2.30.196.

  • What is the severity of CVE-2018-17153?

    CVE-2018-17153 has a severity level of 9.8 (Critical).

  • How does CVE-2018-17153 affect Western Digital My Cloud devices?

    CVE-2018-17153 allows an unauthenticated attacker to authenticate as an admin user without needing a password, giving them full control of the affected device.

  • Is my Western Digital My Cloud device vulnerable to CVE-2018-17153?

    Your Western Digital My Cloud device is vulnerable to CVE-2018-17153 if it is running a firmware version earlier than 2.30.196.

  • How can I fix CVE-2018-17153?

    To fix CVE-2018-17153, you should update your Western Digital My Cloud device firmware to version 2.30.196 or later.

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