CVE-2020-13600 : What You Need to Know

A vulnerability in Zephyr versions >= 1.14.2 and >= 2.3.0 could allow an attacker to corrupt kernel memory through a malformed SPI response for eswifi.

Understanding CVE-2020-13600

This CVE involves a heap-based buffer overflow vulnerability (CWE-122) in Zephyr.

What is CVE-2020-13600?

The vulnerability arises from a malformed SPI response for eswifi, leading to potential corruption of kernel memory in affected Zephyr versions.

The Impact of CVE-2020-13600

The vulnerability has a CVSS base score of 7 (High severity) with impacts on confidentiality, integrity, and availability. It requires physical access and user interaction but no privileges.

Technical Details of CVE-2020-13600

This section delves into the specifics of the vulnerability.

Vulnerability Description

The issue involves a heap-based buffer overflow (CWE-122) due to malformed SPI responses for eswifi, potentially leading to kernel memory corruption.

Affected Systems and Versions

Product: Zephyr
Vendor: Zephyrproject-rtos
Versions: >= 1.14.2, >= 2.3.0

Exploitation Mechanism

The vulnerability can be exploited by sending specially crafted SPI responses to the affected system, triggering the buffer overflow.

Mitigation and Prevention

Protecting systems from CVE-2020-13600 requires immediate actions and long-term security practices.

Immediate Steps to Take

Apply patches or updates provided by Zephyrproject-rtos promptly.
Monitor for any unusual system behavior that could indicate exploitation.

Long-Term Security Practices

Implement network segmentation to limit the impact of potential attacks.
Conduct regular security assessments and audits to identify and address vulnerabilities.

Patching and Updates

Regularly check for security advisories and updates from Zephyrproject-rtos to patch any known vulnerabilities.