CVE-2021-21789 : Exploit Details and Defense Strategies
Learn about CVE-2021-21789, a high-severity vulnerability in IOBit Advanced SystemCare Ultimate 14.2.0.220 enabling local attackers to exploit IOCTL requests for privilege escalation.
A privilege escalation vulnerability in IOBit Advanced SystemCare Ultimate 14.2.0.220 allows local attackers to execute malicious code via IOCTL exploitation.
Understanding CVE-2021-21789
This CVE identifies a privilege escalation vulnerability affecting IOBit Advanced SystemCare Ultimate 14.2.0.220.
What is CVE-2021-21789?
The vulnerability arises from how the specific driver manages Privileged I/O write requests, potentially enabling local attackers to trigger malicious activities through IOCTL exploitation.
The Impact of CVE-2021-21789
With a CVSS base score of 8.8 (High), the vulnerability poses a significant risk by allowing attackers to escalate their privileges and compromise confidentiality, integrity, and availability of the system.
Technical Details of CVE-2021-21789
This section provides an insight into the technical aspects of the CVE.
Vulnerability Description
The flaw manifests in the way IOBit Advanced SystemCare Ultimate 14.2.0.220 driver processes Privileged I/O write requests, enabling unauthorized escalation of privileges via IOCTL 0x9c40a0e0.
Affected Systems and Versions
IOBit Advanced SystemCare Ultimate 14.2.0.220 is the specific version impacted by this vulnerability.
Exploitation Mechanism
Local attackers can exploit this vulnerability by sending a malicious IRP to trigger the flawed driver, potentially leading to privilege escalation.
Mitigation and Prevention
Protecting systems against CVE-2021-21789 requires immediate action and long-term security measures.
Immediate Steps to Take
- Disable unnecessary services and restrict access permissions to critical system components.
- Monitor system logs for any suspicious activities that could indicate exploitation attempts.
Long-Term Security Practices
- Regularly update and patch software to mitigate known vulnerabilities.
- Implement the principle of least privilege to limit access rights based on job necessities.
Patching and Updates
Stay informed about security advisories related to IOBit products and promptly apply patches released by the vendor to address CVE-2021-21789.