CVE-2022-23968 : Security Advisory and Response

Xerox VersaLink devices on specific versions of firmware before 2022-01-26 are vulnerable to a remote denial-of-service attack via a crafted TIFF file. This article provides insights into the impact, technical details, and mitigation of CVE-2022-23968.

Understanding CVE-2022-23968

This section delves into the details of the vulnerability affecting Xerox VersaLink devices.

What is CVE-2022-23968?

The vulnerability in Xerox VersaLink devices allows remote attackers to render the device unusable by exploiting a flaw in image parsing through crafted TIFF files.

The Impact of CVE-2022-23968

Attackers can trigger a denial-of-service condition on affected devices, leading to a reboot loop that requires intervention from a field technician to resolve. Affected firmware versions include xx.42.01 and xx.50.61.

Technical Details of CVE-2022-23968

This section outlines the technical aspects of the vulnerability.

Vulnerability Description

The flaw arises from improper handling of TIFF files, causing a boot loop due to image parsing, which can only be fixed by a technician.

Affected Systems and Versions

Xerox VersaLink devices running firmware versions before 2022-01-26, particularly xx.42.01 and xx.50.61, are vulnerable to this attack.

Exploitation Mechanism

Remote attackers can exploit this vulnerability by sending a crafted TIFF file via an unauthenticated HTTP POST request, triggering a reboot loop.

Mitigation and Prevention

Explore the steps to mitigate the impact of CVE-2022-23968.

Immediate Steps to Take

For immediate protection, update Xerox VersaLink devices to the latest firmware versions to prevent exploitation.

Long-Term Security Practices

Implement network segmentation and access controls to limit the exposure of vulnerable devices to untrusted sources.

Patching and Updates

Regularly check for firmware updates from Xerox and apply patches promptly to address known vulnerabilities.