#VU25509 Session Fixation in My Cloud Home and ibi - CVE-2020-8990

Vulnerability identifier: #VU25509

Vulnerability risk: High

CVSSv4.0: 5.7 [CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber]

CVE-ID: CVE-2020-8990

CWE-ID: CWE-384

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
My Cloud Home
Client/Desktop applications / Other client software
ibi
Client/Desktop applications / Multimedia software

Vendor: Western Digital

Description

The vulnerability allows a remote attacker to gain unauthorized access to the web interface.

The vulnerability exists due to the session invalidation issue when the affected software fails to terminate all open sessions on a password reset, change or deletion of user account. A remote attacker can use the browser's back button to access web pages previously accessed by the victim.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

My Cloud Home: before 3.6.0

ibi: before 3.6.0

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External links
https://support.wdc.com/downloads.aspx?g=907&lang=en#downloads
https://www.westerndigital.com/support/productsecurity/wdc-19013-my-cloud-home-and-ibi-session-invalidation-vulnerability

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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.