CVE-2021-34843 : Security Advisory and Response
Discover CVE-2021-34843, a high severity vulnerability in Foxit PDF Reader 11.0.0.49893 allowing attackers to execute arbitrary code. Learn about its impact, technical details, and mitigation steps.
This article provides details about CVE-2021-34843, a vulnerability in Foxit PDF Reader 11.0.0.49893 that allows remote attackers to execute arbitrary code.
Understanding CVE-2021-34843
This CVE-2021-34843 vulnerability affects Foxit PDF Reader 11.0.0.49893, enabling attackers to execute malicious code with high impact.
What is CVE-2021-34843?
CVE-2021-34843 in Foxit PDF Reader 11.0.0.49893 allows remote attackers to exploit a specific flaw in Annotation object handling to execute arbitrary code, requiring user interaction.
The Impact of CVE-2021-34843
The CVSS base score of 7.8 classifies this vulnerability as high severity, with high impacts on confidentiality, integrity, and availability. Attackers can execute code without requiring any privileges.
Technical Details of CVE-2021-34843
This section delves into the technical aspects of CVE-2021-34843.
Vulnerability Description
The vulnerability arises from a lack of object validation in Foxit PDF Reader's Annotation object handling, allowing attackers to execute code within the current process.
Affected Systems and Versions
Foxit PDF Reader version 11.0.0.49893 is affected by this vulnerability, exposing installations to the risk of remote code execution.
Exploitation Mechanism
User interaction is necessary for exploit, requiring targets to visit a malicious page or open a malevolent file to trigger the vulnerability.
Mitigation and Prevention
Understanding how to mitigate the risks posed by CVE-2021-34843 is crucial for ensuring system security.
Immediate Steps to Take
Users should exercise caution when interacting with PDF files and avoid opening those from untrusted or suspicious sources to prevent exploitation.
Long-Term Security Practices
Regularly updating Foxit PDF Reader to the latest secure version and ensuring robust cybersecurity measures can enhance protection against such vulnerabilities.
Patching and Updates
Stay informed about security bulletins and advisories from Foxit to apply necessary patches and updates promptly for enhanced security.