CVE-2021-21794 : Exploit Details and Defense Strategies

A vulnerability has been identified in Accusoft ImageGear 19.9, which could allow an attacker to execute arbitrary code by providing a specially crafted file. This could result in memory corruption and poses a critical threat.

Understanding CVE-2021-21794

This CVE pertains to an out-of-bounds write vulnerability in the TIF bits_per_sample processing functionality of Accusoft ImageGear 19.9.

What is CVE-2021-21794?

CVE-2021-21794 is an out-of-bounds write vulnerability in Accusoft ImageGear 19.9 that allows attackers to trigger memory corruption by exploiting a specially crafted file.

The Impact of CVE-2021-21794

The impact of this vulnerability is critical, with a CVSS base score of 9.8. It can lead to high confidentiality, integrity, and availability impacts without requiring special privileges from the attacker.

Technical Details of CVE-2021-21794

This section outlines the vulnerability description, affected systems and versions, as well as the exploitation mechanism.

Vulnerability Description

The vulnerability exists in the TIF bits_per_sample processing functionality of Accusoft ImageGear 19.9, enabling attackers to perform an out-of-bounds write operation and potentially corrupt memory.

Affected Systems and Versions

Accusoft ImageGear 19.9 is the specific version known to be affected by this vulnerability.

Exploitation Mechanism

By providing a specially malformed file, attackers can exploit this vulnerability in Accusoft ImageGear 19.9, leading to memory corruption.

Mitigation and Prevention

To safeguard against CVE-2021-21794, immediate steps must be taken, alongside the implementation of long-term security practices and patching processes.

Immediate Steps to Take

Ensure that all systems running Accusoft ImageGear 19.9 are updated with the latest patches and security fixes. Additionally, avoid opening files from untrusted or unknown sources.

Long-Term Security Practices

Regularly update and patch software, conduct security assessments, and educate users on safe file handling practices to mitigate similar vulnerabilities.

Patching and Updates

Stay informed about security updates released by Accusoft and promptly apply patches to address known vulnerabilities.