CVE-2018-20768 : Security Advisory and Response

A vulnerability has been identified in Xerox WorkCentre models 3655, 3655i, 58XX, 58XXi, 59XX, 59XXi, 6655, 6655i, 72XX, 72XXi, 78XX, 78XXi, 7970, 7970i, EC7836, and EC7856 with firmware versions prior to R18-05 073.xxx.0487.15000. This vulnerability allows attackers to execute PHP code by exploiting a writable file.

Understanding CVE-2018-20768

This CVE pertains to a security issue found in various Xerox WorkCentre models, enabling unauthorized execution of PHP code.

What is CVE-2018-20768?

CVE-2018-20768 is a vulnerability affecting Xerox WorkCentre devices with specific firmware versions, allowing malicious actors to run PHP code through a writable file.

The Impact of CVE-2018-20768

The vulnerability poses a significant risk as attackers can exploit it to execute arbitrary PHP code on the affected devices, potentially leading to unauthorized access and data breaches.

Technical Details of CVE-2018-20768

This section provides in-depth technical insights into the vulnerability.

Vulnerability Description

The flaw in Xerox WorkCentre models allows threat actors to execute PHP code by leveraging a writable file, compromising the device's security.

Affected Systems and Versions

Xerox WorkCentre models 3655, 3655i, 58XX, 58XXi, 59XX, 59XXi, 6655, 6655i, 72XX, 72XXi, 78XX, 78XXi, 7970, 7970i, EC7836, and EC7856
Firmware versions prior to R18-05 073.xxx.0487.15000

Exploitation Mechanism

Attackers can exploit this vulnerability by writing malicious PHP code to a specific file on the affected Xerox WorkCentre devices, enabling unauthorized code execution.

Mitigation and Prevention

Protecting systems from CVE-2018-20768 requires immediate actions and long-term security practices.

Immediate Steps to Take

Update Xerox WorkCentre firmware to version R18-05 073.xxx.0487.15000 or later to mitigate the vulnerability.
Monitor for any suspicious activities on the devices.

Long-Term Security Practices

Implement network segmentation to isolate critical devices from potential threats.
Conduct regular security audits and penetration testing to identify and address vulnerabilities proactively.

Patching and Updates

Regularly check for firmware updates and security patches from Xerox to ensure the devices are protected against known vulnerabilities.