CVE-2021-34853 : Security Advisory and Response

This CVE-2021-34853 article provides detailed insights into a vulnerability affecting Foxit PDF Reader version 11.0.0.49893, allowing remote attackers to execute arbitrary code through malicious files or pages.

Understanding CVE-2021-34853

In this section, we will explore the specifics of CVE-2021-34853, including its impact, technical details, and mitigation strategies.

What is CVE-2021-34853?

The vulnerability in CVE-2021-34853 enables remote attackers to execute arbitrary code on systems running the affected version of Foxit PDF Reader. The flaw lies in the handling of Annotation objects, exposing systems to code execution threats.

The Impact of CVE-2021-34853

With a CVSS base score of 7.8 (High severity), this vulnerability requires user interaction for exploitation. Attackers can leverage the lack of object validation to execute code within the current process, posing a significant risk to confidentiality, integrity, and availability.

Technical Details of CVE-2021-34853

Let's delve deeper into the technical aspects of CVE-2021-34853 to understand the vulnerability better.

Vulnerability Description

The vulnerability results from the lack of validating object existence before performing operations, enabling attackers to execute code within the current process.

Affected Systems and Versions

Foxit PDF Reader version 11.0.0.49893 is impacted by this vulnerability, putting users of this specific version at risk of arbitrary code execution.

Exploitation Mechanism

To exploit CVE-2021-34853, attackers require users to interact with malicious pages or files. By manipulating Annotation objects, threat actors can execute code on vulnerable systems.

Mitigation and Prevention

Understanding the steps to mitigate and prevent exploitation of CVE-2021-34853 is crucial for ensuring system security.

Immediate Steps to Take

Users should refrain from interacting with untrusted or suspicious files and websites to prevent potential exploitation of this vulnerability.

Long-Term Security Practices

Implementing security best practices, such as keeping software up to date and staying informed about security bulletins, can help mitigate the risks associated with CVE-2021-34853.

Patching and Updates

Foxit PDF Reader users are advised to install the latest updates provided by the vendor to address the vulnerability and enhance system security.