CVE-2017-15853 : Security Advisory and Response
Learn about CVE-2017-15853, a buffer over-read vulnerability in Qualcomm Android for MSM, Firefox OS for MSM, and QRD Android. Find out how to mitigate the risk and protect your systems.
This CVE-2017-15853 article provides insights into a vulnerability affecting Qualcomm Android for MSM, Firefox OS for MSM, and QRD Android with all Android releases from CAF using the Linux kernel.
Understanding CVE-2017-15853
This CVE involves a buffer over-read vulnerability in Qualcomm Android for MSM, Firefox OS for MSM, and QRD Android, potentially leading to security risks.
What is CVE-2017-15853?
The vulnerability arises in the processing of PTT commands, specifically due to the lack of verification of the packet length in the function ptt_sock_send_msg_to_app(). This oversight can result in a buffer over-read if the packet length is invalid.
The Impact of CVE-2017-15853
The vulnerability poses a risk of a buffer over-read in WLAN, potentially leading to security breaches and unauthorized access to sensitive information.
Technical Details of CVE-2017-15853
This section delves into the technical aspects of the CVE.
Vulnerability Description
The vulnerability in Qualcomm Android for MSM, Firefox OS for MSM, and QRD Android occurs when the function ptt_sock_send_msg_to_app() is called without validating the packet length, allowing for a buffer over-read if the length is incorrect.
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 during the processing of PTT commands when the packet length is not properly verified, enabling malicious actors to trigger a buffer over-read.
Mitigation and Prevention
Protecting systems from CVE-2017-15853 requires immediate actions and long-term security practices.
Immediate Steps to Take
- Apply the security patch level 2018-04-05 or later to mitigate the vulnerability.
- Monitor network traffic for any suspicious activities that could indicate exploitation of the vulnerability.
Long-Term Security Practices
- Regularly update software and firmware to ensure the latest security patches are in place.
- Conduct security audits and penetration testing to identify and address potential vulnerabilities proactively.
Patching and Updates
- Stay informed about security bulletins and updates from Qualcomm and relevant vendors to promptly address any new vulnerabilities and apply patches.