CVE-2018-17141 Explained : Impact and Mitigation

HylaFAX 6.0.6 and HylaFAX+ 5.6.0 are vulnerable to remote code execution through a specific mishandling of FAX pages with the JPEG bit enabled.

Understanding CVE-2018-17141

The vulnerability in HylaFAX allows attackers to execute arbitrary code via a dial-in session, exploiting a flaw in the FaxModem::writeECMData() function.

What is CVE-2018-17141?

The vulnerabilities in HylaFAX 6.0.6 and HylaFAX+ 5.6.0 enable malicious individuals to execute arbitrary code by sending a FAX page with the JPEG bit enabled.

The Impact of CVE-2018-17141

Exploitation of this vulnerability can lead to remote code execution, posing a significant security risk to affected systems.

Technical Details of CVE-2018-17141

HylaFAX vulnerability details and affected systems.

Vulnerability Description

The flaw in HylaFAX allows remote attackers to execute arbitrary code by manipulating FAX pages with the JPEG bit enabled, specifically in the FaxModem::writeECMData() function.

Affected Systems and Versions

HylaFAX 6.0.6
HylaFAX+ 5.6.0

Exploitation Mechanism

Attackers can exploit this vulnerability through a dial-in session where a FAX page with the JPEG bit enabled is provided, triggering the flaw in the FaxModem::writeECMData() function.

Mitigation and Prevention

Steps to mitigate and prevent the CVE-2018-17141 vulnerability.

Immediate Steps to Take

Apply security updates provided by the vendor promptly.
Monitor network traffic for any suspicious activity.
Restrict access to fax services to trusted entities only.

Long-Term Security Practices

Regularly update and patch all software and systems.
Conduct security audits and penetration testing to identify vulnerabilities.
Implement network segmentation to limit the impact of potential breaches.

Patching and Updates

Install the latest security updates and patches released by HylaFAX to address this vulnerability.