CVE-2021-39687 : Vulnerability Insights and Analysis
Understand the heap buffer overflow vulnerability in Android kernel (CVE-2021-39687) leading to local information disclosure. Learn the impact, affected systems, and mitigation steps.
This CVE-2021-39687 article provides insights into a heap buffer overflow vulnerability in Android kernel, leading to potential local information disclosure without additional privileges.
Understanding CVE-2021-39687
This section delves into the specifics of CVE-2021-39687.
What is CVE-2021-39687?
In HandleTransactionIoEvent of actuator_driver.cc, a heap buffer overflow creates an out-of-bounds read, potentially leading to local information disclosure. No extra execution privileges are required for exploitation.
The Impact of CVE-2021-39687
The vulnerability could allow an attacker to gain local information without user interaction, posing a risk to data confidentiality.
Technical Details of CVE-2021-39687
Exploring the technical aspects of CVE-2021-39687.
Vulnerability Description
- Type: Information disclosure
- Trigger: Heap buffer overflow in HandleTransactionIoEvent of actuator_driver.cc
Affected Systems and Versions
- Product: Android
- Versions: Android kernel
Exploitation Mechanism
The vulnerability could be exploited without the need for user interaction, potentially leading to information disclosure.
Mitigation and Prevention
Understanding the necessary steps to address CVE-2021-39687.
Immediate Steps to Take
- Apply relevant patches from the vendor
- Monitor security advisories for updates
Long-Term Security Practices
- Regular security training for developers
- Implement secure coding practices
Patching and Updates
- Keep systems up to date with security patches
- Regularly check for vendor updates and advisories