CVE-2021-21787 : Vulnerability Insights and Analysis
Learn about CVE-2021-21787, a privilege escalation vulnerability in IOBit Advanced SystemCare Ultimate 14.2.0.220. Impact, technical details, affected versions, exploitation, and mitigation steps provided.
A privilege escalation vulnerability exists in IOBit Advanced SystemCare Ultimate 14.2.0.220 due to inadequate access control in handling privileged I/O write requests.
Understanding CVE-2021-21787
This CVE highlights a privilege escalation vulnerability in IOBit Advanced SystemCare Ultimate 14.2.0.220, leading to elevated privileges for unprivileged users.
What is CVE-2021-21787?
CVE-2021-21787 is a vulnerability in the way IOBit Advanced SystemCare Ultimate 14.2.0.220 driver handles Privileged I/O write requests. This vulnerability can potentially allow unprivileged users to escalate their privileges.
The Impact of CVE-2021-21787
The impact of CVE-2021-21787 is rated as high, with a CVSS base score of 8.8. It poses a threat to confidentiality, integrity, and availability, requiring low privileges for exploitation.
Technical Details of CVE-2021-21787
This section provides more in-depth technical details about the vulnerability.
Vulnerability Description
The vulnerability arises from how the driver processes IOCTL 0x9c40a0d8, allowing unprivileged users to write to specific device ports, potentially leading to privilege escalation.
Affected Systems and Versions
IOBit Advanced SystemCare Ultimate 14.2.0.220 is the affected version by this vulnerability.
Exploitation Mechanism
By leveraging IOCTL 0x9c40a0d8, unprivileged users can write one byte to specific I/O device ports, exploiting the vulnerability to escalate their privileges.
Mitigation and Prevention
To mitigate the risks associated with CVE-2021-21787, immediate actions and long-term security practices are crucial.
Immediate Steps to Take
Users should apply security patches, restrict access to vulnerable systems, and monitor for any unauthorized actions.
Long-Term Security Practices
Implementing the principle of least privilege, regularly updating software, and maintaining security awareness are essential for long-term security.
Patching and Updates
Ensure timely installation of security patches provided by IOBit to address and fix the privilege escalation vulnerability in Advanced SystemCare Ultimate 14.2.0.220.