CVE-2021-39647 : Vulnerability Insights and Analysis

This CVE-2021-39647 article provides details about a vulnerability in the Android kernel that could lead to local information disclosure.

Understanding CVE-2021-39647

This section delves into the specifics of the identified vulnerability.

What is CVE-2021-39647?

The vulnerability resides in the mon_smc_load_sp of gs101-sc/plat/samsung/exynos/soc/exynos9845/smc_booting.S. It involves a potential reinitialization of TEE due to improper locking, which may result in local information disclosure, requiring System execution privileges but no user interaction.

The Impact of CVE-2021-39647

The impact includes the potential local information disclosure with the necessity of System execution privileges.

Technical Details of CVE-2021-39647

Explore the technical aspects of this CVE in detail.

Vulnerability Description

The vulnerability allows for a reinitialization of TEE due to improper locking in Android kernel's mon_smc_load_sp, potentially leading to local information disclosure.

Affected Systems and Versions

Product: Android
Versions: Android kernel

Exploitation Mechanism

The exploitation of this vulnerability requires System execution privileges and can result in the disclosure of local information.

Mitigation and Prevention

Learn about the steps to mitigate and prevent exploitation of this CVE.

Immediate Steps to Take

Apply relevant security patches for the affected versions.
Monitor security bulletins for updates from the vendor.

Long-Term Security Practices

Regularly update and patch the system to address security vulnerabilities.
Implement least privilege access controls to limit potential risks.

Patching and Updates

Efficient patch management and timely application of security updates are essential to safeguard against this vulnerability.