CVE-2021-34851 Explained : Impact and Mitigation

This article provides detailed information about CVE-2021-34851, a vulnerability in Foxit PDF Reader 11.0.0.49893 that allows remote attackers to execute arbitrary code requiring user interaction.

Understanding CVE-2021-34851

This CVE involves a specific flaw in the handling of Annotation objects in Foxit PDF Reader 11.0.0.49893, which can be exploited by attackers to execute code in the context of the current process.

What is CVE-2021-34851?

CVE-2021-34851 is a vulnerability in Foxit PDF Reader 11.0.0.49893 that enables remote attackers to run arbitrary code on affected systems. The flaw arises from the lack of object validation before executing operations, necessitating user interaction for exploitation.

The Impact of CVE-2021-34851

The vulnerability in Foxit PDF Reader poses a high risk with a CVSS base score of 7.8, impacting confidentiality, integrity, and availability. Attackers can exploit this flaw by enticing users to visit malicious pages or open corrupted files.

Technical Details of CVE-2021-34851

This section delves into the specific technical aspects of CVE-2021-34851, shedding light on the vulnerability, affected systems, and the exploitation mechanism.

Vulnerability Description

The vulnerability stems from the mishandling of Annotation objects within Foxit PDF Reader 11.0.0.49893, allowing threat actors to trigger code execution within the current process.

Affected Systems and Versions

Foxit PDF Reader version 11.0.0.49893 is affected by this flaw, rendering installations vulnerable to remote code execution by malicious attackers.

Exploitation Mechanism

To exploit this vulnerability, the attacker must lure the victim into interacting with a malicious page or file, exploiting the lack of object validation in the Annotation object handling.

Mitigation and Prevention

To secure systems against CVE-2021-34851, immediate steps should be taken to mitigate the risk and prevent unauthorized code execution.

Immediate Steps to Take

Users of Foxit PDF Reader 11.0.0.49893 are advised to exercise caution while browsing and avoid opening files from untrusted or suspicious sources.

Long-Term Security Practices

Implementing robust cybersecurity practices, such as keeping software updated, using reliable security solutions, and educating users about potential threats, can enhance overall defense against such vulnerabilities.

Patching and Updates

Vendor patches and updates addressing CVE-2021-34851 may be available. Users should promptly apply these security updates to remediate the vulnerability and fortify system defenses.