CVE-2019-9112 : Vulnerability Insights and Analysis

CVE-2019-9112 was published on February 25, 2019, and affects the msm gpu driver for customized Linux kernels on the Xiaomi perseus-p-oss MIX 3 device. The vulnerability allows a malicious application on a rooted device to crash the system by exploiting an integer overflow in the _sde_debugfs_conn_cmd_tx_write function.

Understanding CVE-2019-9112

This CVE entry highlights a flaw in the msm gpu driver for customized Linux kernels on the Xiaomi perseus-p-oss MIX 3 device.

What is CVE-2019-9112?

The vulnerability arises due to the lack of proper checks for integer overflow in the count argument within the _sde_debugfs_conn_cmd_tx_write function, leading to an OOPS (Out-Of-Page Situation) that can be triggered by a malicious application on a rooted device.

The Impact of CVE-2019-9112

The vulnerability can be exploited by a crafted application to crash the system through a syscall, potentially causing a denial of service (DoS) situation.

Technical Details of CVE-2019-9112

This section delves into the technical aspects of the CVE.

Vulnerability Description

The flaw in the _sde_debugfs_conn_cmd_tx_write function allows for an integer overflow, resulting in an OOPS and system crash when exploited by a malicious application.

Affected Systems and Versions

Xiaomi perseus-p-oss MIX 3 device before 2018-11-26

Exploitation Mechanism

A malicious application on a rooted device can trigger the vulnerability by making a syscall, leading to a system crash.

Mitigation and Prevention

Protecting systems from CVE-2019-9112 requires immediate actions and long-term security practices.

Immediate Steps to Take

Apply security patches provided by the vendor promptly.
Avoid running untrusted applications on rooted devices.

Long-Term Security Practices

Regularly update device firmware to mitigate known vulnerabilities.
Implement proper access controls to limit the impact of potential exploits.

Patching and Updates

Keep the system up to date with the latest security patches to address known vulnerabilities.