CVE-2018-11947 : Vulnerability Insights and Analysis

A vulnerability affecting various Qualcomm Snapdragon platforms that could lead to information exposure in WLAN.

Understanding CVE-2018-11947

What is CVE-2018-11947?

The vulnerability involves the possibility of double freeing the txrx stats req during the pdev detach process when unloading the host driver in multiple Qualcomm Snapdragon platforms.

The Impact of CVE-2018-11947

This vulnerability could potentially result in information exposure in WLAN, impacting the confidentiality of data transmitted over wireless networks.

Technical Details of CVE-2018-11947

Vulnerability Description

The issue arises from the accidental double freeing of txrx stats req during the pdev detach process when unloading the host driver in Qualcomm Snapdragon platforms.

Affected Systems and Versions

Affected Products: Snapdragon Auto, Snapdragon Consumer Electronics Connectivity, Snapdragon Consumer IOT, Snapdragon Industrial IOT, Snapdragon Mobile, Snapdragon Voice & Music, Snapdragon Wired Infrastructure and Networking
Affected Versions: IPQ8064, MDM9150, MDM9206, MDM9607, MDM9640, MDM9650, MSM8996AU, QCA6174A, QCA6574AU, QCA9377, QCA9379, QCA9558, QCA9880, QCA9886, QCA9980, QCS405, QCS605, SD 210/SD 212/SD 205, SD 425, SD 427, SD 430, SD 435, SD 450, SD 625, SD 636, SD 675, SD 712 / SD 710 / SD 670, SD 730, SD 820A, SD 835, SD 845 / SD 850, SD 855, SDA660, SDM630, SDM660, SDX20, SDX24

Exploitation Mechanism

The vulnerability can be exploited by unloading the host driver in Qualcomm Snapdragon platforms, leading to the double freeing of txrx stats req and potential information exposure in WLAN.

Mitigation and Prevention

Immediate Steps to Take

Apply patches provided by Qualcomm to address the vulnerability.
Monitor Qualcomm's security bulletins for updates and advisories.

Long-Term Security Practices

Regularly update firmware and software to the latest versions.
Implement network segmentation and access controls to limit exposure.

Patching and Updates

Ensure all affected systems are updated with the latest patches from Qualcomm to mitigate the vulnerability.