CVE-2021-36925 : What You Need to Know
Discover the impact and mitigation strategies for CVE-2021-36925, a vulnerability in Realtek RtsUpx USB Utility Driver that allows unauthorized access to physical memory.
RtsUpx.sys in Realtek RtsUpx USB Utility Driver for Camera/Hub/Audio through 1.14.0.0 allows local low-privileged users to achieve an arbitrary read or write operation from/to physical memory via a crafted Device IO Control packet, leading to Escalation of Privileges, Denial of Service, Code Execution, and Information Disclosure.
Understanding CVE-2021-36925
This section provides insights into the impact, technical details, and mitigation strategies related to the CVE-2021-36925 vulnerability.
What is CVE-2021-36925?
CVE-2021-36925 involves a vulnerability in the Realtek RtsUpx USB Utility Driver that allows unauthorized local users to gain escalated privileges and potentially execute malicious code.
The Impact of CVE-2021-36925
This vulnerability could lead to serious consequences including Escalation of Privileges, Denial of Service attacks, unauthorized Code Execution, and sensitive Information Disclosure.
Technical Details of CVE-2021-36925
Understanding the specifics of the vulnerability is crucial for effective mitigation and prevention.
Vulnerability Description
RtsUpx.sys in Realtek RtsUpx USB Utility Driver through version 1.14.0.0 enables local low-privileged users to manipulate physical memory using specially crafted Device IO Control packets.
Affected Systems and Versions
All systems running Realtek RtsUpx USB Utility Driver versions up to 1.14.0.0 are vulnerable to this exploit.
Exploitation Mechanism
By sending a malicious Device IO Control packet to a targeted device, attackers can perform unauthorized read or write operations on the system's physical memory.
Mitigation and Prevention
Protecting systems against CVE-2021-36925 requires immediate actions and long-term security measures.
Immediate Steps to Take
System administrators should restrict access to vulnerable devices, monitor IO Control requests, and apply security patches promptly.
Long-Term Security Practices
Regular security audits, user privilege management, and network segmentation are essential for preventing similar vulnerabilities in the future.
Patching and Updates
Realtek has released security advisories and patches to address the CVE-2021-36925 vulnerability. Ensure that systems are updated with the latest fixes to mitigate the risk of exploitation.