CVE-2021-34259 : Exploit Details and Defense Strategies

A buffer overflow vulnerability in the USBH_ParseCfgDesc() function of STMicroelectronics STM32Cube Middleware v1.8.0 and below allows attackers to execute arbitrary code.

Understanding CVE-2021-34259

This CVE identifies a critical buffer overflow vulnerability in the mentioned function of the STM32Cube Middleware, enabling malicious actors to run arbitrary code.

What is CVE-2021-34259?

The CVE-2021-34259 involves a buffer overflow flaw in the USBH_ParseCfgDesc() function of the STMicroelectronics STM32Cube Middleware v1.8.0 and earlier versions. This vulnerability may allow attackers to execute unauthorized code.

The Impact of CVE-2021-34259

If successfully exploited, this vulnerability can lead to unauthorized code execution on devices utilizing the affected versions of the STM32Cube Middleware. Attackers could potentially take control of the systems and perform malicious activities.

Technical Details of CVE-2021-34259

This section covers the technical aspects of the CVE, including vulnerability description, affected systems, versions, and exploitation mechanism.

Vulnerability Description

The vulnerability lies in the USBH_ParseCfgDesc() function of STMicroelectronics STM32Cube Middleware v1.8.0 and below, leaving it susceptible to a buffer overflow attack that could be exploited by threat actors.

Affected Systems and Versions

The affected systems include those running STMicroelectronics STM32Cube Middleware v1.8.0 and earlier versions. Any system utilizing these specific versions is at risk.

Exploitation Mechanism

Malicious individuals can exploit this vulnerability by sending specially crafted input to trigger a buffer overflow condition in the USBH_ParseCfgDesc() function, potentially leading to arbitrary code execution.

Mitigation and Prevention

To secure systems from the CVE-2021-34259 vulnerability, immediate steps, long-term security practices, and the importance of patching and updates are crucial.

Immediate Steps to Take

System administrators must apply security patches provided by STMicroelectronics promptly to address the vulnerability and prevent exploitation. It is recommended to restrict network access to affected systems.

Long-Term Security Practices

Incorporating robust security measures, conducting regular security audits, and keeping abreast of firmware updates are essential for safeguarding systems against similar vulnerabilities in the long run.

Patching and Updates

Regularly monitor for security advisories from STMicroelectronics and promptly apply software patches and updates to mitigate the risk of potential exploits.