CVE-2021-32198 : Security Advisory and Response

EmTec ZOC through 8.02.4 is vulnerable to a denial of service attack where remote servers can hang the Windows GUI by rapidly changing the ZOC window's title without implementing any delay. This could lead to multiple SetWindowTextA or SetWindowTextW calls, impacting the application's performance.

Understanding CVE-2021-32198

This section provides insights into the vulnerability and its impact.

What is CVE-2021-32198?

EmTec ZOC through version 8.02.4 allows remote servers to trigger a denial of service attack on Windows systems by repeatedly changing the ZOC window's title at a high speed, causing excessive calls to set window text functions without a delay mechanism.

The Impact of CVE-2021-32198

The vulnerability could result in a Windows GUI hang due to the overload of SetWindowTextA or SetWindowTextW calls, impacting the application's responsiveness and usability.

Technical Details of CVE-2021-32198

Explore the technical aspects of the vulnerability.

Vulnerability Description

EmTec ZOC through version 8.02.4 lacks delay handling, allowing malicious servers to flood the application with rapid window title changes, leading to a denial of service condition.

Affected Systems and Versions

All systems running EmTec ZOC up to version 8.02.4 are affected by this vulnerability.

Exploitation Mechanism

Attackers can exploit this issue by sending a high volume of window title change requests to the vulnerable application, causing it to freeze or become unresponsive.

Mitigation and Prevention

Learn how to address and prevent the CVE-2021-32198 vulnerability.

Immediate Steps to Take

To mitigate the risk, users are advised to update EmTec ZOC to a patched version that includes a fix for the denial of service vulnerability.

Long-Term Security Practices

Implementing network-level protections and monitoring for unusual activity can help detect and prevent similar attacks in the future.

Patching and Updates

Regularly check for software updates and security patches from EmTec to ensure that the application is protected against known vulnerabilities.