CVE-2018-11903 : Security Advisory and Response

Android for MSM, Firefox OS for MSM, and QRD Android from Qualcomm are affected by a vulnerability due to the absence of a length validation check, potentially leading to an out-of-bounds write vulnerability in WLAN HOST.

Understanding CVE-2018-11903

This CVE identifies an improper validation of array index in WLAN interfaces in certain Android releases from CAF utilizing the Linux kernel.

What is CVE-2018-11903?

The vulnerability arises from a lack of length validation check for values used as array indices in WMA interfaces, allowing for potential out-of-bounds writes in WLAN HOST.

The Impact of CVE-2018-11903

The vulnerability could be exploited to execute arbitrary code or cause a denial of service by an attacker with network access.

Technical Details of CVE-2018-11903

The technical aspects of this CVE are as follows:

Vulnerability Description

The vulnerability stems from the improper validation of array indices in WLAN interfaces, enabling an out-of-bounds write in WLAN HOST.

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 occurs when a value received from a caller function is used as an array index for WMA interfaces without proper validation.

Mitigation and Prevention

To address CVE-2018-11903, consider the following steps:

Immediate Steps to Take

Apply patches provided by Qualcomm to fix the vulnerability.
Monitor vendor security bulletins for updates and apply them promptly.

Long-Term Security Practices

Regularly update software and firmware to the latest versions.
Implement network segmentation and access controls to limit the impact of potential attacks.

Patching and Updates

Stay informed about security advisories from Qualcomm and apply patches as soon as they are available.