CVE-2021-42686 Explained : Impact and Mitigation
Learn about CVE-2021-42686, an Integer Overflow vulnerability in Accops HyWorks Windows Client allowing local attackers to run arbitrary code or cause a denial of service.
An Integer 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 trigger a denial of service (DoS) through crafted I/O Request Packets.
Understanding CVE-2021-42686
This CVE identifies a critical Integer Overflow vulnerability in Accops HyWorks Windows Client.
What is CVE-2021-42686?
An Integer Overflow flaw in the IOCTL Handler 0x22001B in Accops HyWorks Windows Client could permit local attackers to run arbitrary code in kernel mode or cause a DoS by exploiting specially crafted I/O Request Packets.
The Impact of CVE-2021-42686
- Local attackers can execute arbitrary code in kernel mode or lead to a DoS scenario involving memory corruption and OS crash.
Technical Details of CVE-2021-42686
This section delves into the technical aspects of the CVE.
Vulnerability Description
The Integer Overflow vulnerability in the IOCTL Handler 0x22001B in Accops HyWorks Windows Client could enable attackers to execute arbitrary code in kernel mode or induce a DoS condition via malformed I/O Request Packets.
Affected Systems and Versions
- System: Accops HyWorks Windows Client
- Versions Affected: prior to v 3.2.8.200
Exploitation Mechanism
The vulnerability can be exploited by local attackers using specially crafted I/O Request Packets to trigger memory corruption, leading to the execution of malicious code or causing the operating system to crash.
Mitigation and Prevention
Protecting against and addressing the CVE issue.
Immediate Steps to Take
- Upgrade Accops HyWorks Windows Client to version 3.2.8.200 or later.
- Implement strict access controls to limit local access to sensitive system resources.
- Monitor system logs for any suspicious activities indicating exploitation attempts.
Long-Term Security Practices
- Regularly update and patch software to mitigate known vulnerabilities.
- Conduct security training for employees on identifying and reporting suspicious activities.
Patching and Updates
- Apply vendor-provided patches promptly to fix the Integer Overflow vulnerability in Accops HyWorks Windows Client.