CVE-2021-34267 : Vulnerability Insights and Analysis

A denial of service vulnerability in the USBH_MSC_InterfaceInit() function of STMicroelectronics STM32Cube Middleware v1.8.0 and below can lead to system disruption when communicating with the connected endpoint.

Understanding CVE-2021-34267

This section provides insights into the impact and technical details of CVE-2021-34267.

What is CVE-2021-34267?

CVE-2021-34267 is a denial of service (DOS) vulnerability found in the USBH_MSC_InterfaceInit() function of STMicroelectronics STM32Cube Middleware v1.8.0 and earlier versions. The flaw can cause system disruption when attempting to interact with the connected endpoint.

The Impact of CVE-2021-34267

The vulnerability can be exploited by malicious actors to trigger a denial of service condition, disrupting normal operations and potentially causing system unresponsiveness.

Technical Details of CVE-2021-34267

This section delves into the specific technical aspects of the vulnerability.

Vulnerability Description

The vulnerability arises in the USBH_MSC_InterfaceInit() function within STMicroelectronics STM32Cube Middleware v1.8.0 and prior versions. It allows attackers to launch a DOS attack, affecting system communication with the connected endpoint.

Affected Systems and Versions

STMicroelectronics STM32Cube Middleware v1.8.0 and versions below are susceptible to this vulnerability, potentially impacting systems utilizing these software versions.

Exploitation Mechanism

By exploiting the flaw in the USBH_MSC_InterfaceInit() function, threat actors can initiate a DOS attack, hindering system communication processes.

Mitigation and Prevention

To address CVE-2021-34267, immediate steps and long-term security practices are recommended to enhance system resilience.

Immediate Steps to Take

It is crucial to apply vendor-released patches and updates promptly to mitigate the risk of exploitation and prevent potential service disruptions.

Long-Term Security Practices

Implementing robust security measures, such as network segmentation, access controls, and regular security assessments, can bolster defenses against DOS attacks and other security threats.

Patching and Updates

Stay informed about security advisories from STMicroelectronics and promptly apply recommended patches and updates to ensure the software is protected against known vulnerabilities.