CVE-2021-21821 Explained : Impact and Mitigation

A stack-based buffer overflow vulnerability exists in the PDF process_fontname functionality of Accusoft ImageGear 19.9, allowing an attacker to execute code by providing a specially crafted malformed file. This CVE has a CVSS base score of 9.8, categorizing it as critical.

Understanding CVE-2021-21821

This section delves into the essential details of the CVE-2021-21821 vulnerability.

What is CVE-2021-21821?

CVE-2021-21821 is a stack-based buffer overflow vulnerability found in Accusoft ImageGear 19.9, enabling attackers to trigger code execution through a malicious file.

The Impact of CVE-2021-21821

With a high CVSS base score of 9.8, this critical vulnerability poses a significant risk to confidentiality, integrity, and availability.

Technical Details of CVE-2021-21821

Explore the technical aspects of CVE-2021-21821 to understand its implications further.

Vulnerability Description

The vulnerability arises from a stack-based buffer overflow in the PDF process_fontname functionality of Accusoft ImageGear 19.9.

Affected Systems and Versions

Accusoft ImageGear 19.9 is confirmed to be impacted by this vulnerability.

Exploitation Mechanism

An attacker can exploit this flaw by providing a specially crafted malformed file to trigger the buffer overflow vulnerability.

Mitigation and Prevention

Discover the necessary steps to mitigate and prevent the exploitation of CVE-2021-21821.

Immediate Steps to Take

Users are advised to apply relevant security patches and updates provided by Accusoft promptly to remediate this vulnerability.

Long-Term Security Practices

Enhancing system security measures and implementing robust coding practices can mitigate the risks associated with buffer overflow vulnerabilities.

Patching and Updates

Regularly updating software and maintaining vigilance against suspicious files can help prevent exploitation of vulnerabilities like CVE-2021-21821.