CVE-2021-42681 Explained : Impact and Mitigation

A Buffer Overflow vulnerability exists in Accops HyWorks DVM Tools prior to v3.3.1.105. The IOCTL Handler 0x22001B allows local attackers to execute arbitrary code in kernel mode or cause a denial of service (memory corruption and OS crash) via specially crafted I/O Request Packet.

Understanding CVE-2021-42681

This CVE involves a Buffer Overflow vulnerability in Accops HyWorks DVM Tools that could lead to code execution or denial of service.

What is CVE-2021-42681?

This CVE refers to a flaw in Accops HyWorks DVM Tools where local attackers can exploit an IOCTL Handler to execute malicious code or trigger a denial of service attack.

The Impact of CVE-2021-42681

Local attackers can execute arbitrary code in kernel mode
Possibility of a denial of service leading to memory corruption and OS crash

Technical Details of CVE-2021-42681

This section provides deeper insights into the vulnerability.

Vulnerability Description

The vulnerability exists in the Accops HyWorks DVM Tools due to improper handling of IOCTL Handler 0x22001B.

Affected Systems and Versions

Product: Accops HyWorks DVM Tools prior to v3.3.1.105

Exploitation Mechanism

By crafting a specially designed I/O Request Packet, local attackers can exploit the IOCTL Handler to achieve code execution or trigger a denial of service.

Mitigation and Prevention

It is crucial to take immediate and long-term actions to address this vulnerability.

Immediate Steps to Take

Update to version v3.3.1.105 or later
Monitor for any suspicious activities

Long-Term Security Practices

Regularly update all software and firmware
Implement strong access controls

Patching and Updates

Ensure the latest version of Accops HyWorks DVM Tools (v3.3.1.105) is installed to mitigate this vulnerability.