CVE-2021-0947 : Vulnerability Insights and Analysis
Learn about CVE-2021-0947, an information disclosure vulnerability in Android's PVRSRVBridgeTLDiscoverStreams method in Android SoC versions, leading to kernel heap data leakage.
Android's PVRSRVBridgeTLDiscoverStreams method in Android SoC versions allocates buffer data on the heap, which may result in kernel heap data leakage due to uninitialized buffers being copied to userspace. This can lead to an information disclosure vulnerability.
Understanding CVE-2021-0947
This CVE relates to an information disclosure vulnerability in Android's PVRSRVBridgeTLDiscoverStreams method.
What is CVE-2021-0947?
The PVRSRVBridgeTLDiscoverStreams method in Android SoC versions could lead to uninitialized heap buffer data being leaked to userspace, potentially exposing sensitive information.
The Impact of CVE-2021-0947
The vulnerability could be exploited by attackers to obtain sensitive data stored in the kernel heap, even without elevated privileges.
Technical Details of CVE-2021-0947
The vulnerability stems from the improper handling of buffer data in the PVRSRVBridgeTLDiscoverStreams method in Android SoC versions. The method fails to initialize the buffer properly, which results in uninitialized data being copied to userspace.
Vulnerability Description
The issue arises due to the failure of the TLServerDiscoverStreamsKM method to properly fill buffer data, leading to uninitialized heap data leakage.
Affected Systems and Versions
Android SoC versions are affected by this vulnerability, potentially impacting devices running these specific versions.
Exploitation Mechanism
Attackers could exploit this vulnerability to extract sensitive information by leveraging the uninitialized buffer data copied to userspace.
Mitigation and Prevention
It is crucial to take immediate action to address this vulnerability and prevent potential data leaks.
Immediate Steps to Take
Users are advised to apply security patches provided by the Android platform to mitigate the risk of information disclosure.
Long-Term Security Practices
Adopting secure coding practices and regularly updating systems can help prevent similar vulnerabilities in the future.
Patching and Updates
Ensure that Android devices are updated with the latest security patches and firmware releases to safeguard against this vulnerability.