CVE-2021-39636 Explained : Impact and Mitigation
Learn about the CVE-2021-39636 vulnerability in Android kernel, leading to potential local information disclosure. Find details on impact, affected systems, exploitation, and mitigation steps.
This CVE-2021-39636 article provides details about a vulnerability in Android kernel that could lead to local information disclosure.
Understanding CVE-2021-39636
This section delves into the specifics of the CVE-2021-39636 vulnerability.
What is CVE-2021-39636?
This vulnerability resides in do_ipt_get_ctl and do_ipt_set_ctl of ip_tables.c. It allows a possible leakage of kernel information due to uninitialized data, potentially resulting in local information disclosure, requiring system execution privileges without user interaction.
The Impact of CVE-2021-39636
The vulnerability could permit an attacker to disclose local information, posing a risk to affected systems.
Technical Details of CVE-2021-39636
Exploring technical aspects of the CVE-2021-39636 vulnerability.
Vulnerability Description
The issue arises in ip_tables.c, enabling kernel information leakage due to uninitialized data.
Affected Systems and Versions
- Product: Android
- Versions Affected: Android kernel
Exploitation Mechanism
The exploitation requires local access and can lead to unauthorized information disclosure.
Mitigation and Prevention
Guidance on mitigating the CVE-2021-39636 vulnerability.
Immediate Steps to Take
- Regularly monitor security bulletins for patches.
- Apply security updates promptly to affected systems.
Long-Term Security Practices
- Implement secure coding practices to prevent similar vulnerabilities.
- Maintain awareness of potential information disclosure risks.
Patching and Updates
- Download and apply the relevant patches from the official vendor sources.