CVE-2018-5820 : What You Need to Know

Android for MSM, Firefox OS for MSM, and QRD Android by Qualcomm, Inc. are affected by an integer overflow vulnerability that can lead to a heap overwrite.

Understanding CVE-2018-5820

This CVE involves a memory allocation issue in Qualcomm Android for MSM, Firefox OS for MSM, and QRD Android, potentially resulting in a heap overwrite due to inadequate parameter validation.

What is CVE-2018-5820?

The function wma_tbttoffset_update_event_handler() in Qualcomm Android for MSM, Firefox OS for MSM, and QRD Android with all Android releases from CAF using the Linux kernel before the security patch level 2018-04-05 encounters a memory allocation issue. An integer overflow may occur, leading to a heap overwrite.

The Impact of CVE-2018-5820

The vulnerability can be exploited to trigger a heap overwrite, potentially allowing an attacker to execute arbitrary code or crash the system.

Technical Details of CVE-2018-5820

Vulnerability Description

The vulnerability arises from a parameter received from firmware that is used to allocate memory for a local buffer without proper validation, leading to an integer overflow and potential heap overwrite.

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 can be exploited by an attacker to trigger an integer overflow, potentially leading to a heap overwrite and subsequent system compromise.

Mitigation and Prevention

Immediate Steps to Take

Apply the latest security patch provided by Qualcomm to address the vulnerability.
Monitor vendor security bulletins for updates and patches.

Long-Term Security Practices

Regularly update software and firmware to mitigate known vulnerabilities.
Implement network segmentation and access controls to limit the impact of potential exploits.

Patching and Updates

Ensure all systems are updated with the latest security patches from Qualcomm.