CVE-2021-22677 : Vulnerability Insights and Analysis

This CVE-2021-22677 article provides insights into an integer overflow vulnerability in the APIs of host MCUs, affecting SimpleLink Wi-Fi, MSP432, CC13XX, CC26XX, CC32XX, CC3100 devices. The vulnerability could result in a denial-of-service condition or code execution.

Understanding CVE-2021-22677

This section delves into the impact, technical details, and mitigation strategies related to CVE-2021-22677.

What is CVE-2021-22677?

CVE-2021-22677 entails an integer overflow in the APIs of host MCUs when attempting Wi-Fi network connections, posing risks of denial-of-service or code execution.

The Impact of CVE-2021-22677

The vulnerability potentially allows threat actors to trigger denial-of-service conditions or execute malicious code on affected devices, compromising their integrity and functionality.

Technical Details of CVE-2021-22677

The specific details regarding the vulnerability, affected systems, and exploitation methods are crucial to understanding CVE-2021-22677.

Vulnerability Description

The integer overflow vulnerability impacts host MCU APIs during Wi-Fi network connections on SimpleLink Wi-Fi, MSP432, CC13XX, CC26XX, CC32XX, CC3100. This loophole can be exploited to initiate denial-of-service attacks or execute arbitrary code.

Affected Systems and Versions

The vulnerability affects versions such as MSP432E4 SDK: v4.20.00.12 and earlier, CC32XX SDK v4.30.00.06 and earlier, CC13X0 SDK versions prior to v4.10.03, CC13X2 and CC26XX SDK versions before v4.40.00, CC3200 SDK v1.5.0 and prior, CC3100 SDK v1.3.0 and prior.

Exploitation Mechanism

Threat actors can leverage the integer overflow flaw in MCU APIs to disrupt services or gain unauthorized access, potentially leading to critical system compromise.

Mitigation and Prevention

Understanding the measures to mitigate and prevent vulnerabilities like CVE-2021-22677 is vital for maintaining system security.

Immediate Steps to Take

Prompt actions such as applying security patches, network segmentation, and monitoring for suspicious activities are imperative to reduce the risk posed by CVE-2021-22677.

Long-Term Security Practices

Incorporating robust coding practices, regular security audits, and employee training on cybersecurity awareness can enhance the long-term resilience of systems against similar vulnerabilities.

Patching and Updates

Ensuring timely installation of vendor-released patches, firmware updates, and version upgrades is essential to address known vulnerabilities and strengthen the security posture.