Strix
26.1K

CVE-2018-17153

UnknownEPSS 86.59%

Last modified

CVE-2018-17153 is a vulnerability of currently unknown severity. 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. EPSS estimates a 86.59% chance of exploitation in the next 30 days.

Description

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.

Metrics

EPSS Probability
86.59%

99.7th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

VendorProductVersions
Western DigitalMy Cloud Wdbctl0020hwt Firmware< 2.30.196
Western DigitalMy Cloud Pr4100< 2.30.196
Western DigitalMy Cloud Pr2100 Firmware< 2.30.196
Western DigitalMy Cloud Mirror Gen 2 Firmware< 2.30.196
Western DigitalMy Cloud Mirror Firmware< 2.30.196
Western DigitalMy Cloud Ex4100< 2.30.196
Western DigitalMy Cloud Ex4 Firmware< 2.30.196
Western DigitalMy Cloud Ex2100 Firmware< 2.30.196
Western DigitalMy Cloud Ex2 Ultra Firmware< 2.30.196
Western DigitalMy Cloud Ex2 Firmware< 2.30.196
Western DigitalMy Cloud Dl4100 Firmware< 2.30.196
Western DigitalMy Cloud Dl2100< 2.30.196

References

Timeline

Published
Last Modified
Status
Modified

Frequently Asked Questions

What is CVE-2018-17153?
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.
How severe is CVE-2018-17153?
Severity scoring for CVE-2018-17153 is pending analysis. The EPSS model estimates a 86.59% probability of exploitation in the next 30 days.
How do I fix CVE-2018-17153?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

How Strix Helps

Related CVEs from 2018

View all 2018CVEs →

Are you affected by CVE-2018-17153?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST