CVE-2017-11091 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 Use-After-Free vulnerability in the mdss_rotator_ioctl function.

Understanding CVE-2017-11091

This CVE identifies a Use-After-Free vulnerability in specific Qualcomm products running on Android platforms.

What is CVE-2017-11091?

A Use-After-Free condition in the mdss_rotator_ioctl function of the /dev/mdss_rotator driver can occur in Android for MSM, Firefox OS for MSM, QRD Android, and all Android releases from CAF using the Linux kernel when a fence is installed prematurely.

The Impact of CVE-2017-11091

This vulnerability could be exploited by an attacker to execute arbitrary code or cause a denial of service on the affected systems.

Technical Details of CVE-2017-11091

The technical aspects of this CVE include:

Vulnerability Description

The Use-After-Free vulnerability in the mdss_rotator_ioctl function of the /dev/mdss_rotator driver.

Affected Systems and Versions

Products: 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 arises when a fence is installed prematurely, leading to the Use-After-Free condition.

Mitigation and Prevention

To address CVE-2017-11091, consider the following steps:

Immediate Steps to Take

Apply security patches provided by Qualcomm or the respective vendors.
Monitor vendor security bulletins for updates and advisories.

Long-Term Security Practices

Regularly update software and firmware on affected devices.
Implement security best practices to mitigate similar vulnerabilities.

Patching and Updates

Ensure timely installation of security patches and updates from Qualcomm or the device manufacturers.