CVE-2022-29836 Explained : Impact and Mitigation

A Post-Auth Path Traversal Vulnerability was discovered in Western Digital My Cloud Home, My Cloud Home Duo, and SanDisk ibi devices, allowing an attacker to install custom packages via an HTTP API after authentication. This CVE affects specific versions on Linux platforms.

Understanding CVE-2022-29836

This CVE identifies a Path Traversal vulnerability in Western Digital and SanDisk devices that could be exploited post-authentication to manipulate the file system and install unauthorized packages.

What is CVE-2022-29836?

The CVE-2022-29836 vulnerability allows an attacker to exploit an HTTP API to point to random locations on the file system, facilitating unauthorized installation of custom packages on affected Western Digital and SanDisk devices.

The Impact of CVE-2022-29836

The impact of CVE-2022-29836 includes the potential for attackers to compromise the integrity of the file system and install malicious packages on vulnerable devices, leading to unauthorized access and potential data breaches.

Technical Details of CVE-2022-29836

This section covers the specific technical details associated with CVE-2022-29836, including the vulnerability description, affected systems, and the exploitation mechanism.

Vulnerability Description

The vulnerability stems from an improper limitation of a pathname to a restricted directory, enabling attackers to point to arbitrary locations on the file system, thereby initiating the installation of unauthorized packages.

Affected Systems and Versions

Western Digital My Cloud Home and My Cloud Home Duo versions prior to 8.11.0-113 on Linux, as well as SanDisk ibi versions before 8.11.0-113 on Linux, are impacted by CVE-2022-29836.

Exploitation Mechanism

To exploit this vulnerability, an attacker must first authenticate to the targeted device before manipulating the HTTP API parameters to access restricted directories and install custom packages.

Mitigation and Prevention

In this section, we outline the necessary steps to mitigate the risks associated with CVE-2022-29836 and prevent potential security incidents.

Immediate Steps to Take

Users are advised to update their Western Digital My Cloud Home, My Cloud Home Duo, and SanDisk ibi devices to version 8.11.0-113 or later, which includes a patch to address this vulnerability.

Long-Term Security Practices

To enhance long-term security, users should regularly update their firmware, utilize strong authentication mechanisms, and monitor for any unauthorized access or modifications on their devices.

Patching and Updates

Ensure that automatic updates are enabled on your My Cloud Home and ibi devices to receive the latest firmware versions that contain patches for CVE-2022-29836 vulnerabilities.