CVE-2021-34268 : Security Advisory and Response

STMicroelectronics STM32Cube Middleware v1.8.0 and below are impacted by a vulnerability in the USBH_ParseDevDesc() function. Attackers can exploit this issue to launch a denial of service (DOS) attack by sending a malformed USB device packet.

Understanding CVE-2021-34268

This section provides an overview of the CVE-2021-34268 vulnerability affecting STMicroelectronics STM32Cube Middleware.

What is CVE-2021-34268?

CVE-2021-34268 is a vulnerability in the USBH_ParseDevDesc() function of STMicroelectronics STM32Cube Middleware v1.8.0 and earlier versions that enables cybercriminals to carry out a denial of service (DOS) attack using a specially crafted USB device packet.

The Impact of CVE-2021-34268

The impact of this vulnerability includes the potential for threat actors to disrupt the normal operation of affected devices or services by triggering a DOS condition.

Technical Details of CVE-2021-34268

This section delves into the technical specifics of CVE-2021-34268, including how the vulnerability manifests itself.

Vulnerability Description

The vulnerability in the USBH_ParseDevDesc() function allows threat actors to execute a DOS attack through the utilization of malformed USB device packets, exploiting a flaw in STMicroelectronics STM32Cube Middleware.

Affected Systems and Versions

STMicroelectronics STM32Cube Middleware v1.8.0 and prior versions are vulnerable to CVE-2021-34268, potentially putting devices leveraging these software versions at risk.

Exploitation Mechanism

By sending a malicious USB device packet, threat actors can leverage the USBH_ParseDevDesc() vulnerability to disrupt the targeted system's functionality and create a denial of service scenario.

Mitigation and Prevention

In this section, we explore the steps organizations and individuals can take to mitigate the risks associated with CVE-2021-34268.

Immediate Steps to Take

Immediately applying patches or updates provided by STMicroelectronics is crucial to address the CVE-2021-34268 vulnerability and prevent potential exploitation.

Long-Term Security Practices

Implementing robust security measures, such as network segmentation and access controls, can enhance the overall security posture and reduce the likelihood of successful cyberattacks.

Patching and Updates

Frequently checking for security advisories from STMicroelectronics and promptly applying patches or updates is essential to stay protected against known vulnerabilities like CVE-2021-34268.