CVE-2019-6734 : Exploit Details and Defense Strategies

A vulnerability in Foxit PhantomPDF allows remote attackers to access sensitive information by exploiting a flaw in the setInterval method.

Understanding CVE-2019-6734

This CVE involves a Use After Free vulnerability in Foxit PhantomPDF, enabling attackers to execute code remotely.

What is CVE-2019-6734?

The vulnerability in Foxit PhantomPDF permits attackers to expose critical data on systems running vulnerable versions of the software. Exploitation requires user interaction with a malicious webpage or file, leveraging the setInterval method.

The Impact of CVE-2019-6734

Attackers can reuse a freed pointer through JavaScript operations, allowing code execution within the current process.
Identified as ZDI-CAN-7452, this vulnerability poses a significant security risk to affected systems.

Technical Details of CVE-2019-6734

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

Vulnerability Description

The flaw in Foxit PhantomPDF's handling of the setInterval method enables attackers to reuse freed pointers, leading to code execution.

Affected Systems and Versions

Product: PhantomPDF
Vendor: Foxit
Vulnerable Version: 9.3.0.10826

Exploitation Mechanism

Attackers exploit the setInterval method to reuse freed pointers and execute malicious code within the current process.

Mitigation and Prevention

Protecting systems from CVE-2019-6734 requires immediate actions and long-term security practices.

Immediate Steps to Take

Update Foxit PhantomPDF to the latest version to patch the vulnerability.
Avoid interacting with suspicious webpages or files to prevent exploitation.

Long-Term Security Practices

Regularly update software and security patches to mitigate future vulnerabilities.
Educate users on safe browsing habits and the risks of interacting with unknown files.

Patching and Updates

Foxit Software provides security bulletins for users to stay informed about patches and updates.