CVE-2022-22990: (Pwn2Own) Western Digital MyCloud PR4100 nasAdmin Authentication Bypass Vulnerability
A limited authentication bypass vulnerability was discovered that could allow an attacker to achieve remote code execution and escalate privileges on the My Cloud devices. Addressed this vulnerability by changing access token validation logic and rewriting rule logic on PHP scripts.
Other sources
This vulnerability allows network-adjacent attackers to bypass authentication on affected installations of Western Digital MyCloud PR4100. Authentication is not required to exploit this vulnerability. The specific flaw exists within the nasAdmin service, which listens on TCP ports 80 and 443 by default. The issue results from incorrect string matching logic when accessing protected pages. An attacker can leverage this vulnerability to bypass authentication on the system.
— ZDI
Affected Software
Remediation
Information
Event History
Frequently Asked Questions
What is the vulnerability ID of this vulnerability?
The vulnerability ID is CVE-2022-22990.
What is the title of this vulnerability?
The title of this vulnerability is (Pwn2Own) Western Digital MyCloud PR4100 nasAdmin Authentication Bypass Vulnerability.
What is the severity of CVE-2022-22990?
The severity of CVE-2022-22990 is high (8.8).
How does CVE-2022-22990 affect Western Digital MyCloud PR4100?
CVE-2022-22990 allows network-adjacent attackers to bypass authentication on affected installations of Western Digital MyCloud PR4100.
Is authentication required to exploit CVE-2022-22990?
No, authentication is not required to exploit CVE-2022-22990.
Where can I find more information about CVE-2022-22990?
You can find more information about CVE-2022-22990 at the following references: [link1](https://www.westerndigital.com/support/product-security/wdc-22002-my-cloud-os5-firmware-5-19-117), [link2](https://www.zerodayinitiative.com/advisories/ZDI-22-347/), [link3](https://www.zerodayinitiative.com/advisories/ZDI-22-076/).
How do I fix the CVE-2022-22990 vulnerability?
To fix the CVE-2022-22990 vulnerability, you should update your Western Digital MyCloud PR4100 firmware to version 5.19.117 or later.