CVE-2017-15821 Explained : Impact and Mitigation

Android for MSM, Firefox OS for MSM, QRD Android, and all Android releases from CAF using the Linux kernel are affected by a buffer overwrite vulnerability.

Understanding CVE-2017-15821

This CVE describes a security issue in the wma_p2p_noa_event_handler() function that lacks a boundary check on a firmware-derived value, potentially leading to a buffer overwrite.

What is CVE-2017-15821?

The vulnerability in the wma_p2p_noa_event_handler() function in various Qualcomm-based systems allows an attacker to trigger a buffer overwrite due to the absence of proper boundary checks.

The Impact of CVE-2017-15821

The lack of boundary checks can be exploited by malicious actors to overwrite buffers, leading to potential security breaches and unauthorized access to sensitive information.

Technical Details of CVE-2017-15821

The technical aspects of the CVE-2017-15821 vulnerability are as follows:

Vulnerability Description

The vulnerability arises from the absence of a boundary check on a firmware-derived value within the wma_p2p_noa_event_handler() function.

Affected Systems and Versions

Android for MSM
Firefox OS for MSM
QRD Android
All Android releases from CAF utilizing the Linux kernel

Exploitation Mechanism

Attackers can exploit this vulnerability by providing crafted input to trigger the buffer overwrite, potentially leading to unauthorized access and security compromises.

Mitigation and Prevention

To address CVE-2017-15821, consider the following mitigation strategies:

Immediate Steps to Take

Apply patches provided by Qualcomm and relevant software vendors.
Monitor for any unusual system behavior that could indicate exploitation of the vulnerability.
Implement network security measures to detect and block malicious activities.

Long-Term Security Practices

Regularly update software and firmware to patch known vulnerabilities.
Conduct security assessments and penetration testing to identify and address potential weaknesses.
Educate users and IT staff on best practices for cybersecurity awareness.

Patching and Updates

Stay informed about security bulletins and updates from Qualcomm and Android sources.
Prioritize the installation of security patches to mitigate the risk of exploitation.