CVE-2018-5890 : What You Need to Know

Android releases from CAF using the Linux kernel (e.g., Android for MSM, Firefox OS for MSM, QRD Android) before the security patch level 2018-06-05 are affected by an Integer Underflow in Boot vulnerability.

Understanding CVE-2018-5890

This CVE identifies a specific vulnerability in Android releases from CAF that leverage the Linux kernel, potentially leading to security issues.

What is CVE-2018-5890?

In Android releases from CAF using the Linux kernel, a flaw exists where an error check for a valid device tree is omitted if the fdt_totalsize is indicated as 0 for the current device tree.

The Impact of CVE-2018-5890

This vulnerability could be exploited by malicious actors to bypass critical error checks, potentially leading to unauthorized access or system compromise.

Technical Details of CVE-2018-5890

Android systems utilizing the Linux kernel are susceptible to an Integer Underflow in Boot vulnerability.

Vulnerability Description

The issue arises when the fdt_totalsize is reported as 0 for the current device tree, allowing the bypass of a crucial error check for a valid device tree.

Affected Systems and Versions

Product: Android for MSM, Firefox OS for MSM, QRD Android
Vendor: Qualcomm, Inc.
Versions: All Android releases from CAF using the Linux kernel

Exploitation Mechanism

Malicious actors can exploit this vulnerability by manipulating the fdt_totalsize parameter to evade necessary device tree validation checks.

Mitigation and Prevention

It is crucial to take immediate action to address and prevent the CVE-2018-5890 vulnerability.

Immediate Steps to Take

Apply security patches and updates to affected systems promptly.
Monitor vendor notifications and security bulletins for relevant patches.
Implement network segmentation and access controls to limit potential attack surfaces.

Long-Term Security Practices

Regularly update and patch all software components to mitigate known vulnerabilities.
Conduct security assessments and audits to identify and address potential weaknesses.

Patching and Updates

Ensure all Android releases from CAF using the Linux kernel are updated to versions beyond the security patch level 2018-06-05 to mitigate the Integer Underflow in Boot vulnerability.