CVE-2021-42687 : Vulnerability Insights and Analysis
Learn about CVE-2021-42687, a Buffer Overflow vulnerability in Accops HyWorks Windows Client allowing arbitrary code execution and denial of service. Find mitigation steps and updates here.
A Buffer Overflow vulnerability exists in Accops HyWorks Windows Client prior to v 3.2.8.200, allowing local attackers to execute arbitrary code in kernel mode or cause a denial of service.
Understanding CVE-2021-42687
What is CVE-2021-42687?
The vulnerability in Accops HyWorks Windows Client allows attackers to exploit the IOCTL Handler 0x22005B, leading to memory corruption and OS crash through malicious I/O Request Packets.
The Impact of CVE-2021-42687
The vulnerability enables local attackers to execute arbitrary code in kernel mode or trigger a denial of service, compromising system integrity and availability.
Technical Details of CVE-2021-42687
Vulnerability Description
A Buffer Overflow vulnerability in Accops HyWorks Windows Client allows for arbitrary code execution or denial of service via crafted I/O Request Packets.
Affected Systems and Versions
- Accops HyWorks Windows Client prior to v 3.2.8.200
Exploitation Mechanism
- Attackers exploit the IOCTL Handler 0x22005B to execute malicious code or trigger memory corruption and OS crashes.
Mitigation and Prevention
Immediate Steps to Take
- Update Accops HyWorks Windows Client to version 3.2.8.200 or later
- Implement strict input validation mechanisms
- Monitor and restrict kernel-level access
Long-Term Security Practices
- Regular security assessments and audits
- Train users on recognizing and avoiding suspicious activities
Patching and Updates
- Stay informed about security patches and updates for the affected software