CVE-2017-5556 Explained : Impact and Mitigation

A vulnerability has been discovered in the ConvertToPDF plugin of Foxit Reader and PhantomPDF on Windows systems, allowing remote attackers to exploit the gflags application and cause a denial of service, potentially leading to information disclosure and code execution.

Understanding CVE-2017-5556

This CVE entry highlights a security flaw in Foxit Reader and PhantomPDF versions prior to 8.2 on Windows systems.

What is CVE-2017-5556?

The vulnerability in the ConvertToPDF plugin of Foxit Reader and PhantomPDF versions prior to 8.2 on Windows allows remote attackers to trigger a denial of service, leading to out-of-bounds read and application crash. Attackers can exploit this by using a specially crafted JPEG image.

The Impact of CVE-2017-5556

The vulnerability can result in a denial of service, potential information disclosure, and the ability for attackers to execute code within the current process context.

Technical Details of CVE-2017-5556

This section provides more technical insights into the vulnerability.

Vulnerability Description

The ConvertToPDF plugin in Foxit Reader and PhantomPDF before version 8.2 on Windows, when the gflags app is enabled, allows remote attackers to cause a denial of service through a crafted JPEG image. The exploit can lead to information disclosure and code execution.

Affected Systems and Versions

Foxit Reader versions prior to 8.2
PhantomPDF versions prior to 8.2

Exploitation Mechanism

The vulnerability can be exploited remotely by attackers using a maliciously crafted JPEG image to trigger a denial of service, out-of-bounds read, and application crash.

Mitigation and Prevention

Protecting systems from CVE-2017-5556 requires immediate action and long-term security measures.

Immediate Steps to Take

Disable the ConvertToPDF plugin in Foxit Reader and PhantomPDF if not essential for operations.
Apply the latest security updates and patches from the vendor.
Implement network security measures to prevent remote exploitation.

Long-Term Security Practices

Regularly update software and applications to the latest versions.
Conduct security assessments and penetration testing to identify vulnerabilities.
Educate users on safe browsing habits and the importance of security updates.

Patching and Updates

Foxit Software has released patches to address the vulnerability. Ensure all affected systems are updated to versions 8.2 or newer.