CVE-2021-21784 : Exploit Details and Defense Strategies

An out-of-bounds write vulnerability exists in the JPG format SOF marker processing of Accusoft ImageGear 19.8, allowing an attacker to trigger memory corruption through a specially crafted file.

Understanding CVE-2021-21784

This CVE highlights a critical vulnerability in Accusoft ImageGear 19.8 related to JPG format SOF marker processing.

What is CVE-2021-21784?

The vulnerability in Accusoft ImageGear 19.8 allows attackers to exploit the JPG format SOF marker processing to cause memory corruption with a malicious file.

The Impact of CVE-2021-21784

With a CVSS base score of 9.8 (Critical), this vulnerability poses a high risk to confidentiality, integrity, and availability of affected systems.

Technical Details of CVE-2021-21784

This section provides detailed technical information about the vulnerability.

Vulnerability Description

The vulnerability is classified as CWE-119: Improper Restriction of Operations within the Bounds of a Memory Buffer, enabling out-of-bounds write access.

Affected Systems and Versions

Accusoft ImageGear 19.8 is confirmed to be affected by this vulnerability.

Exploitation Mechanism

By providing a specially crafted malformed file, an attacker can exploit the JPG format SOF marker processing to achieve memory corruption.

Mitigation and Prevention

Protecting systems from CVE-2021-21784 requires immediate action and ongoing security measures.

Immediate Steps to Take

Organizations should apply relevant security patches, monitor for exploitation attempts, and conduct security assessments to identify vulnerable systems.

Long-Term Security Practices

Implementing secure coding practices, conducting regular security audits, and educating users on safe file handling can help prevent similar vulnerabilities.

Patching and Updates

Vendor-supplied patches and updates should be promptly applied to mitigate the risk posed by CVE-2021-21784.