CVE-2021-21776 Explained : Impact and Mitigation

A detailed overview of the out-of-bounds write vulnerability in Accusoft ImageGear 19.8, its impact, technical details, and mitigation steps.

Understanding CVE-2021-21776

This section explores the critical vulnerability found in Accusoft ImageGear 19.8, affecting network-based attack vectors with high severity.

What is CVE-2021-21776?

Accusoft ImageGear 19.8 is susceptible to an out-of-bounds write vulnerability in the SGI Format Buffer Size Processing functionality. By exploiting this flaw with a specially crafted file, an attacker can induce memory corruption.

The Impact of CVE-2021-21776

The impact of this critical vulnerability is significant, with a CVSS base score of 9.8. It poses a high risk to confidentiality, integrity, and availability as an attacker can trigger memory corruption through a malicious file.

Technical Details of CVE-2021-21776

This section delves into the vulnerability description, affected systems, versions, and the exploitation mechanism.

Vulnerability Description

The vulnerability arises due to incorrect calculation of buffer size in the SGI Format Buffer Size Processing of Accusoft ImageGear 19.8, allowing for out-of-bounds write.

Affected Systems and Versions

Accusoft ImageGear 19.8 is the specific version impacted by this vulnerability, posing risks to systems utilizing this software.

Exploitation Mechanism

Exploiting this flaw requires an attacker to provide a specially crafted malformed file to the target system, initiating memory corruption.

Mitigation and Prevention

Learn about the immediate steps to secure systems, best security practices for the long term, and the importance of timely patching and updates.

Immediate Steps to Take

Immediate actions involve implementing security measures to mitigate the risk of exploitation, such as restricting file inputs and monitoring system behavior.

Long-Term Security Practices

Enhancing security postures involves ongoing monitoring, regular security training, and maintaining up-to-date defenses against potential threats.

Patching and Updates

Regularly applying patches and updates released by Accusoft is crucial to address known vulnerabilities and enhance the overall security of systems.