CVE-2022-22993: (Pwn2Own) Western Digital MyCloud PR4100 cgi_api Server-Side Request Forgery Privilege Escalation Vulnerability
A limited SSRF vulnerability was discovered on Western Digital My Cloud devices that could allow an attacker to impersonate a server and reach any page on the server by bypassing access controls. The vulnerability was addressed by creating a whitelist for valid parameters.
Other sources
This vulnerability allows network-adjacent attackers to escalate privileges on affected installations of Western Digital MyCloud PR4100. Although authentication is required to exploit this vulnerability, the existing authentication mechanism can be bypassed. The specific flaw exists within the cgiapi endpoint. The issue results from the lack of proper validation of URIs prior to accessing resources. An attacker can leverage this in conjunction with other vulnerabilities to execute arbitrary code in the context of root.
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Frequently Asked Questions
What is CVE-2022-22993?
CVE-2022-22993 is a vulnerability that allows network-adjacent attackers to escalate privileges on Western Digital MyCloud PR4100 devices.
How severe is CVE-2022-22993?
The severity of CVE-2022-22993 is rated as high, with a CVSS score of 8.8.
What software versions are affected by CVE-2022-22993?
The affected software versions are Western Digital My Cloud OS up to version 5.19.117.
How can CVE-2022-22993 be exploited?
To exploit CVE-2022-22993, network-adjacent attackers need to bypass the existing authentication mechanism on affected Western Digital MyCloud PR4100 devices.
Is there a fix for CVE-2022-22993?
Yes, Western Digital has released firmware version 5.19.117 for My Cloud OS5, which addresses the vulnerability. It is recommended to update to this version to fix CVE-2022-22993.