CVE-2017-15836 Explained : Impact and Mitigation

Android for MSM, Firefox OS for MSM, and QRD Android by Qualcomm, Inc. are affected by an Integer Overflow to Buffer Overflow vulnerability.

Understanding CVE-2017-15836

What is CVE-2017-15836?

This CVE refers to a potential vulnerability in Qualcomm Android for MSM, Firefox OS for MSM, and QRD Android. The issue arises in all Android releases from CAF using the Linux kernel before the security patch level 2018-04-05.

The Impact of CVE-2017-15836

The vulnerability could lead to an integer overflow when the firmware sends a service ready event to the host with a significantly large value in certain parameters, potentially resulting in a buffer overflow.

Technical Details of CVE-2017-15836

Vulnerability Description

The vulnerability stems from an integer overflow to buffer overflow in WLAN.

Affected Systems and Versions

Product: Android for MSM, Firefox OS for MSM, QRD Android
Vendor: Qualcomm, Inc.
Versions: All Android releases from CAF using the Linux kernel

Exploitation Mechanism

The issue occurs when the firmware sends a service ready event with a large value in the num_hw_modes or num_phy parameters, triggering an integer overflow that may lead to a buffer overflow.

Mitigation and Prevention

Immediate Steps to Take

Apply the security patch level 2018-04-05 or later to mitigate the vulnerability.
Monitor vendor security bulletins for updates and patches.

Long-Term Security Practices

Regularly update firmware and software to the latest versions.
Implement network segmentation and access controls to limit the impact of potential attacks.

Patching and Updates

Stay informed about security patches and updates from Qualcomm, Inc. and apply them promptly to ensure system security.