CVE-2021-31459 : Exploit Details and Defense Strategies

This CVE-2021-31459 affects Foxit Reader version 10.1.1.37576, allowing remote attackers to execute arbitrary code due to a vulnerability in the handling of XFA Forms. User interaction is required for exploitation by visiting a malicious page or opening a malicious file.

Understanding CVE-2021-31459

This section will provide insights into the impact and technical details of CVE-2021-31459.

What is CVE-2021-31459?

CVE-2021-31459 is a security vulnerability in Foxit Reader that permits remote attackers to run arbitrary code by exploiting a flaw in XFA Forms handling. The lack of validation on objects allows the attacker to execute code within the current process.

The Impact of CVE-2021-31459

The impact of this vulnerability is rated as high, with a CVSS base score of 7.8. It requires local access and user interaction, affecting confidentiality, integrity, and availability of the system.

Technical Details of CVE-2021-31459

In this section, the technical aspects of the vulnerability will be outlined.

Vulnerability Description

The vulnerability arises from the failure to validate the existence of an object before performing operations on it, leading to code execution in the context of the current process.

Affected Systems and Versions

Foxit Reader version 10.1.1.37576 is affected by this vulnerability.

Exploitation Mechanism

Exploiting this vulnerability requires user interaction, where the target must access a malicious page or file, triggering the execution of arbitrary code.

Mitigation and Prevention

To secure systems from CVE-2021-31459, immediate steps and long-term practices need to be implemented.

Immediate Steps to Take

Users are advised to update Foxit Reader to the latest version and avoid interacting with suspicious links or files to prevent exploitation.

Long-Term Security Practices

Maintaining up-to-date software, employing security best practices, and being cautious while browsing are essential for long-term security.

Patching and Updates

Regularly applying security patches and updates released by the vendor is crucial to address known vulnerabilities and enhance system security.