CVE-2017-15855 : What You Need to Know
Learn about CVE-2017-15855 affecting Qualcomm Android for MSM, Firefox OS for MSM, and QRD Android. Unchecked user space values can lead to a kernel buffer overflow in the camera application.
Android for MSM, Firefox OS for MSM, and QRD Android by Qualcomm are affected by a user-memory-access issue triggered by the camera application. This vulnerability allows for a potential kernel buffer overflow.
Understanding CVE-2017-15855
This CVE details a security vulnerability in Qualcomm Android for MSM, Firefox OS for MSM, and QRD Android, affecting all Android releases from CAF using the Linux kernel.
What is CVE-2017-15855?
The vulnerability arises from unchecked user space values used to copy contents to a kernel buffer, potentially leading to a kernel buffer overflow.
The Impact of CVE-2017-15855
The issue is triggered by the camera application, specifically the Camera CPP module Linux driver, which directly accesses the buffer provided by the application in user space.
Technical Details of CVE-2017-15855
This section provides more in-depth technical insights into the vulnerability.
Vulnerability Description
The problem occurs when the camera application accesses the user space buffer, leading to a potential kernel buffer overflow due to unchecked values.
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 vulnerability is exploited through the Camera CPP module Linux driver directly accessing the user space buffer, allowing for a kernel buffer overflow.
Mitigation and Prevention
To address CVE-2017-15855, follow these mitigation strategies:
Immediate Steps to Take
- Apply security patches provided by Qualcomm and Android promptly.
- Monitor for any unusual camera application behavior.
Long-Term Security Practices
- Regularly update camera-related software to the latest versions.
- Implement strict input validation mechanisms to prevent buffer overflows.
Patching and Updates
- Stay informed about security bulletins from Qualcomm and Android.
- Ensure timely installation of security patches to mitigate the vulnerability.