CVE-2017-11093 : Security Advisory and Response

Android for MSM, Firefox OS for MSM, QRD Android, and all Android releases from CAF using the Linux kernel are affected by a buffer over-read vulnerability in the Display component that could lead to kernel memory exposure.

Understanding CVE-2017-11093

This CVE involves a buffer over-read vulnerability in the Display component of various Android platforms, potentially exposing kernel memory due to improper validation of a specific value.

What is CVE-2017-11093?

The vulnerability arises from reading the "num_of_cea_blocks" value from an untrusted source without adequate upper-bound validation, leading to a buffer over-read in the Display component.

The Impact of CVE-2017-11093

Exploitation of this vulnerability could result in kernel memory exposure, potentially allowing malicious actors to access sensitive information or execute arbitrary code on affected systems.

Technical Details of CVE-2017-11093

Android for MSM, Firefox OS for MSM, QRD Android, and all Android releases from CAF using the Linux kernel are susceptible to this buffer over-read vulnerability.

Vulnerability Description

The issue stems from the lack of proper upper-bound validation when reading the "num_of_cea_blocks" value from an untrusted source (EDID), potentially leading to kernel memory exposure.

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 can be exploited by manipulating the "num_of_cea_blocks" value from the untrusted source, allowing unauthorized access to kernel memory.

Mitigation and Prevention

It is crucial to take immediate steps to address and prevent the exploitation of CVE-2017-11093.

Immediate Steps to Take

Apply security patches provided by Qualcomm or relevant vendors promptly.
Implement network segmentation to limit the impact of potential attacks.
Monitor system logs and network traffic for any suspicious activities.

Long-Term Security Practices

Conduct regular security assessments and penetration testing to identify and address vulnerabilities proactively.
Educate users and IT staff on best practices for system security and threat awareness.

Patching and Updates

Regularly update and patch all software components, including the operating system and applications, to mitigate known vulnerabilities and enhance overall system security.