CVE-2021-39683 : Security Advisory and Response

This CVE-2021-39683 article provides details about a vulnerability affecting Android kernel that could lead to local escalation of privilege.

Understanding CVE-2021-39683

This section explains the impact and technical details of the CVE-2021-39683 vulnerability.

What is CVE-2021-39683?

CVE-2021-39683 is a vulnerability in the copy_from_mbox function of sss_ice_util.c in Android kernel, allowing an out-of-bounds write without proper bounds checking.

The Impact of CVE-2021-39683

The vulnerability could result in local escalation of privilege, requiring system execution privileges. No user interaction is necessary for exploitation.

Technical Details of CVE-2021-39683

This section delves into the specific technical aspects of the CVE-2021-39683 vulnerability.

Vulnerability Description

The vulnerability lies in the copy_from_mbox function of sss_ice_util.c in Android kernel, where a missing bounds check allows an out-of-bounds write.

Affected Systems and Versions

Product: Android
Versions: Android kernel

Exploitation Mechanism

The missing bounds check in the copy_from_mbox function of sss_ice_util.c can be exploited to achieve local escalation of privilege.

Mitigation and Prevention

Learn about the steps to mitigate and prevent CVE-2021-39683.

Immediate Steps to Take

Apply security patches provided by the vendor promptly.
Monitor vendor security bulletins for updates related to this vulnerability.

Long-Term Security Practices

Regularly update and patch the affected systems to prevent exploitation of known vulnerabilities.
Implement robust secure coding practices to reduce the likelihood of similar issues.

Patching and Updates

Ensure that the Android kernel is regularly updated with the latest patches to address this vulnerability.