CVE-2021-42685 : What You Need to Know

An Integer Overflow vulnerability exists in Accops HyWorks DVM Tools prior to v3.3.1.105. The IOCTL Handler in these tools allows attackers to execute arbitrary code or cause a denial of service.

Understanding CVE-2021-42685

What is CVE-2021-42685?

The CVE-2021-42685 vulnerability is due to an Integer Overflow issue present in Accops HyWorks DVM Tools prior to v3.3.1.105, enabling local attackers to trigger memory corruption or OS crashes by exploiting a specific I/O Request Packet.

The Impact of CVE-2021-42685

This vulnerability grants attackers the capability to execute arbitrary code in kernel mode or disrupt services, resulting in potential unauthorized system access and service downtime.

Technical Details of CVE-2021-42685

Vulnerability Description

Accops HyWorks DVM Tools before v3.3.1.105 are susceptible to an Integer Overflow flaw, notably in the IOCTL Handler 0x22005B, leading to memory corruption and denial-of-service scenarios through malicious I/O requests.

Affected Systems and Versions

Product: Accops HyWorks DVM Tools
Vendor: Accops
Versions affected: All versions prior to v3.3.1.105

Exploitation Mechanism

The issue arises from mishandling I/O Request Packets by the IOCTL Handler 0x22005B in Accops HyWorks DVM Tools, allowing local threat actors to perform unauthorized code execution or initiate denial-of-service attacks.

Mitigation and Prevention

Immediate Steps to Take

Update Accops HyWorks DVM Tools to version v3.3.1.105 or later.
Monitor and restrict privileged access to critical systems.

Long-Term Security Practices

Conduct regular security assessments and audits to identify potential vulnerabilities.
Enhance employee awareness and training on cybersecurity best practices.
Implement network segmentation and least privilege access controls.

Patching and Updates

Apply security patches promptly and consistently to ensure systems are protected from known vulnerabilities.