CVE-2021-36924 : Exploit Details and Defense Strategies
Discover how the CVE-2021-36924 vulnerability in Realtek RtsUpx USB Utility Driver enables local low-privileged users to execute malicious code, leading to privilege escalation and denial of service.
RtsUpx.sys in Realtek RtsUpx USB Utility Driver for Camera/Hub/Audio through 1.14.0.0 allows local low-privileged users to achieve a pool overflow, leading to escalation of privileges, denial of service, and code execution through a crafted Device IO Control packet.
Understanding CVE-2021-36924
This section delves into the impact, technical details, and mitigation strategies of the CVE-2021-36924 vulnerability.
What is CVE-2021-36924?
RtsUpx.sys in Realtek RtsUpx USB Utility Driver allows local users to trigger a pool overflow, enabling them to execute arbitrary code.
The Impact of CVE-2021-36924
The vulnerability can result in escalation of privileges, denial of service, and unauthorized code execution by exploiting a crafted Device IO Control packet.
Technical Details of CVE-2021-36924
Understanding the specifics of the vulnerability is crucial for effective mitigation and prevention.
Vulnerability Description
RtsUpx.sys in Realtek RtsUpx USB Utility Driver enables local low-privileged users to exploit a pool overflow, potentially leading to significant security breaches.
Affected Systems and Versions
The vulnerability affects Realtek RtsUpx USB Utility Driver for Camera/Hub/Audio versions up to 1.14.0.0, exposing these systems to the described pool overflow.
Exploitation Mechanism
Exploiting this vulnerability involves sending a carefully crafted Device IO Control packet to a device, allowing the attacker to execute malicious code.
Mitigation and Prevention
To safeguard systems and data, prompt action and robust security practices are essential.
Immediate Steps to Take
Users should update the affected Realtek drivers to the latest secure version to mitigate the risk of exploitation.
Long-Term Security Practices
Implementing stringent access controls, regular security assessments, and monitoring for suspicious activities can enhance overall system security.
Patching and Updates
Regularly applying security patches provided by Realtek for the affected versions is critical to prevent potential vulnerabilities and maintain a secure environment.