CVE-2019-6493 : Security Advisory and Response
Learn about CVE-2019-6493, a vulnerability in SmartDefragDriver.sys of IObit Smart Defrag 6 that could lead to a kernel pointer leakage, impacting system security. Find mitigation steps and preventive measures here.
SmartDefragDriver.sys in IObit Smart Defrag 6 has a vulnerability that could lead to a kernel pointer leakage when a specific IOCTL is called.
Understanding CVE-2019-6493
This CVE involves a flaw in the SmartDefragDriver.sys component of IObit Smart Defrag 6 that could result in a kernel pointer leakage.
What is CVE-2019-6493?
When the IOCTL 0x9C401CC0 is invoked, the SmartDefragDriver.sys (version 2.0) fails to release an executable kernel pool allocated with specific user-defined bytes and size. This failure may lead to a potential leakage of the kernel pointer if the kernel pool transitions into a larger pool.
The Impact of CVE-2019-6493
The vulnerability could be exploited by attackers to leak sensitive kernel information, potentially leading to further system compromise or unauthorized access.
Technical Details of CVE-2019-6493
The technical aspects of the vulnerability provide insight into its nature and potential risks.
Vulnerability Description
The SmartDefragDriver.sys (version 2.0) in IObit Smart Defrag 6 does not release an executable kernel pool allocated with specific user-defined bytes and size when IOCTL 0x9C401CC0 is called, potentially resulting in a kernel pointer leakage.
Affected Systems and Versions
- Product: IObit Smart Defrag 6
- Version: 2.0
Exploitation Mechanism
The vulnerability can be exploited by triggering the specific IOCTL call, causing the kernel pool to transition into a larger pool and potentially leaking the kernel pointer.
Mitigation and Prevention
Protecting systems from CVE-2019-6493 requires immediate actions and long-term security practices.
Immediate Steps to Take
- Consider restricting access to vulnerable systems or services if feasible.
- Monitor for any unusual activities that could indicate exploitation of the vulnerability.
Long-Term Security Practices
- Regularly update and patch software to mitigate known vulnerabilities.
- Implement strong access controls and least privilege principles to limit potential attack surfaces.
Patching and Updates
- Check for security updates or patches provided by IObit for Smart Defrag 6 to address this vulnerability.