CVE-2019-20823 : Security Advisory and Response

A buffer overflow vulnerability has been identified in versions of Foxit PhantomPDF prior to 8.3.11 due to a missing loop correction during JavaScript updates to Field APs.

Understanding CVE-2019-20823

This CVE involves a critical buffer overflow issue in Foxit PhantomPDF versions before 8.3.11.

What is CVE-2019-20823?

The vulnerability stems from a lack of necessary loop correction during JavaScript updates to Field APs in Foxit PhantomPDF versions earlier than 8.3.11.

The Impact of CVE-2019-20823

The buffer overflow vulnerability could potentially allow attackers to execute arbitrary code or cause a denial of service by exploiting the affected software.

Technical Details of CVE-2019-20823

This section delves into the technical aspects of the CVE.

Vulnerability Description

The issue in Foxit PhantomPDF before 8.3.11 results from a buffer overflow triggered by the absence of a required loop correction after JavaScript updates to Field APs.

Affected Systems and Versions

Product: Foxit PhantomPDF
Versions affected: Prior to 8.3.11

Exploitation Mechanism

Attackers can exploit this vulnerability by crafting malicious JavaScript code to trigger the buffer overflow, potentially leading to unauthorized code execution or service disruption.

Mitigation and Prevention

Protecting systems from CVE-2019-20823 requires immediate actions and long-term security measures.

Immediate Steps to Take

Update Foxit PhantomPDF to version 8.3.11 or later to mitigate the vulnerability.
Monitor for any unusual activities on the system that could indicate exploitation.

Long-Term Security Practices

Regularly update software and apply security patches promptly.
Implement network segmentation and access controls to limit the impact of potential attacks.

Patching and Updates

Ensure timely installation of security updates and patches provided by Foxit Software to address known vulnerabilities.