CVE-2021-46894 : Exploit Details and Defense Strategies
Learn about CVE-2021-46894, a Use After Free (UAF) vulnerability affecting HarmonyOS 2.0.0 and EMUI 12.0.0. Find out the impact, technical details, and mitigation steps.
A Use After Free (UAF) vulnerability affecting Huawei's HarmonyOS and EMUI.
Understanding CVE-2021-46894
What is CVE-2021-46894?
The CVE-2021-46894 is a Use After Free (UAF) vulnerability in the uinput module. Exploiting this flaw successfully could result in kernel privilege escalation.
The Impact of CVE-2021-46894
This vulnerability can be exploited to escalate privileges within the kernel, posing a significant security risk to affected systems.
Technical Details of CVE-2021-46894
Vulnerability Description
The vulnerability is categorized as CWE-269: Improper Privilege Management.
Affected Systems and Versions
- HarmonyOS version 2.0.0 is affected.
- EMUI version 12.0.0 is affected.
Exploitation Mechanism
The exploitation involves leveraging the Use After Free (UAF) vulnerability in the uinput module to perform kernel privilege escalation.
Mitigation and Prevention
Immediate Steps to Take
- Apply patches provided by Huawei promptly.
- Monitor vendor security bulletins for updates.
Long-Term Security Practices
- Implement regular security updates and patches.
- Conduct security assessments and audits periodically.
Patching and Updates
Regularly check for and apply security patches issued by Huawei to mitigate the CVE-2021-46894 vulnerability.