CVE-2021-34834 : Exploit Details and Defense Strategies

This CVE-2021-34834 affects Foxit PDF Reader version 11.0.0.49893, allowing remote attackers to execute arbitrary code. User interaction is required for exploitation by visiting a malicious page or opening a malicious file.

Understanding CVE-2021-34834

This vulnerability in Foxit PDF Reader version 11.0.0.49893 enables remote attackers to run arbitrary code through a crafted file or webpage.

What is CVE-2021-34834?

The vulnerability in the handling of Annotation objects allows attackers to execute code within the current process without validating object existence.

The Impact of CVE-2021-34834

With a CVSS base score of 7.8 (High Severity), this vulnerability poses a significant risk due to its high impact on confidentiality, integrity, and availability.

Technical Details of CVE-2021-34834

This vulnerability is classified as CWE-416: Use After Free.

Vulnerability Description

The flaw arises from improper validation of objects before executing operations, enabling attackers to exploit this flaw.

Affected Systems and Versions

Foxit PDF Reader version 11.0.0.49893 is affected by this vulnerability.

Exploitation Mechanism

Attackers can trigger this vulnerability by enticing users to interact with malicious content.

Mitigation and Prevention

To mitigate the CVE-2021-34834 vulnerability, users should take immediate action and implement long-term security measures.

Immediate Steps to Take

Update Foxit PDF Reader to the latest version to patch this vulnerability as a quick fix.

Long-Term Security Practices

Regularly update software and educate users on safe browsing practices to avoid falling victim to similar attacks.

Patching and Updates

Frequent software updates, security patches, and staying informed about security bulletins are essential to prevent exploitation of known vulnerabilities.