CVE-2021-22680 : What You Need to Know

NXP MQX Versions 5.1 and prior are vulnerable to integer overflow in certain functions, leading to arbitrary memory allocation and potential code execution.

Understanding CVE-2021-22680

This CVE involves an integer overflow vulnerability in NXP MQX versions prior to 5.1, which could result in unexpected behavior such as crashes or remote code injection.

What is CVE-2021-22680?

NXP MQX Versions 5.1 and earlier are susceptible to integer overflow in functions like mem_alloc, _lwmem_alloc, and _partition. This flaw allows for unverified memory assignment, leading to arbitrary memory allocation and potentially crashing the system or enabling remote code execution.

The Impact of CVE-2021-22680

With a CVSS base score of 7.3 (High Severity), the vulnerability poses a significant risk, allowing attackers to exploit the overflow to allocate memory in an unattended manner, resulting in various security threats.

Technical Details of CVE-2021-22680

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

Vulnerability Description

The vulnerability stems from an integer overflow in the mentioned memory allocation functions, creating a scenario where excessive memory is assigned, potentially leading to system crashes and unauthorized code execution.

Affected Systems and Versions

NXP MQX versions up to and including 5.1 are impacted by this vulnerability, exposing systems that have not been updated to the latest version.

Exploitation Mechanism

Exploiting this vulnerability involves manipulating the integer overflow to trigger unverified memory allocation, allowing attackers to orchestrate crashes or inject and execute malicious code remotely.

Mitigation and Prevention

To address CVE-2021-22680, immediate actions and long-term security practices should be implemented.

Immediate Steps to Take

Update to NXP MQX version 5.1 or newer to mitigate the vulnerability and enhance system security.

Long-Term Security Practices

Regularly update software, conduct security assessments, and monitor for any signs of unusual memory allocation or system behavior.

Patching and Updates

Stay informed about security patches and updates provided by NXP to address vulnerabilities such as integer overflow in their software.