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CVE-2021-21793 : Security Advisory and Response

Learn about CVE-2021-21793, a critical out-of-bounds write vulnerability in Accusoft ImageGear versions 19.8 and 19.9. Understand the impact, technical details, and mitigation steps.

Accusoft ImageGear versions 19.8 and 19.9 are affected by an out-of-bounds write vulnerability in the JPG sof_nb_comp header processing functionality. This vulnerability can be exploited by an attacker using a specially crafted file to trigger memory corruption leading to a critical impact.

Understanding CVE-2021-21793

This section will cover the details of the CVE-2021-21793 vulnerability.

What is CVE-2021-21793?

CVE-2021-21793 is an out-of-bounds write vulnerability present in Accusoft ImageGear versions 19.8 and 19.9 due to improper processing of the JPG sof_nb_comp header. This flaw can be exploited by an attacker to corrupt memory by supplying a malicious file.

The Impact of CVE-2021-21793

With a CVSS base score of 9.8, CVE-2021-21793 has a critical severity level. It can result in high confidentiality, integrity, and availability impacts, making it a severe threat to affected systems.

Technical Details of CVE-2021-21793

In this section, we will dive into the technical aspects of CVE-2021-21793.

Vulnerability Description

The vulnerability arises from an out-of-bounds write issue in the JPG sof_nb_comp header processing of Accusoft ImageGear 19.8 and 19.9, allowing attackers to trigger memory corruption.

Affected Systems and Versions

Accusoft ImageGear versions 19.8 and 19.9 are affected by this vulnerability, exposing systems that use these versions to potential exploitation.

Exploitation Mechanism

By providing a specially crafted malformed file, an attacker can exploit this vulnerability to execute arbitrary code, potentially leading to a complete compromise of the targeted system.

Mitigation and Prevention

Explore the mitigation strategies and preventative measures for CVE-2021-21793 in this section.

Immediate Steps to Take

Users are advised to update to the latest patched versions of Accusoft ImageGear to mitigate the risk of exploitation. Additionally, exercise caution when handling untrusted files to prevent malicious actors from exploiting this vulnerability.

Long-Term Security Practices

Implementing secure coding practices and regular security assessments can help organizations identify and address vulnerabilities proactively.

Patching and Updates

Stay informed about security updates and patches released by Accusoft to address CVE-2021-21793 and other potential vulnerabilities to secure your systems effectively.

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