CVE-2021-27427 : Vulnerability Insights and Analysis

RIOT OS version 2020.01.1 is vulnerable to an integer wrap-around in its implementation of calloc function, potentially leading to arbitrary memory allocation and unexpected behaviors like crashes or remote code injection/execution.

Understanding CVE-2021-27427

This CVE involves an integer overflow or wraparound vulnerability in RIOT OS version 2020.01.1, affecting its calloc function.

What is CVE-2021-27427?

CVE-2021-27427, also known as RIOT OS Integer Overflow or Wraparound, allows for arbitrary memory allocation due to an integer wrap-around issue. This can result in severe consequences such as crashing or unauthorized code execution.

The Impact of CVE-2021-27427

The impact of this vulnerability is rated as high severity with a CVSS base score of 7.3. It affects the confidentiality, integrity, and availability of systems that run RIOT OS version 2020.01.1.

Technical Details of CVE-2021-27427

This section covers specific technical aspects of the CVE.

Vulnerability Description

The vulnerability arises from an integer wrap-around in the calloc function, allowing for unexpected memory allocation.

Affected Systems and Versions

RIOT OS version 2020.01.1 is the specific version impacted by this vulnerability.

Exploitation Mechanism

The vulnerability can be exploited to trigger crashes or execute remote code by manipulating memory allocation.

Mitigation and Prevention

Protecting systems from CVE-2021-27427 requires immediate action and long-term security measures.

Immediate Steps to Take

Users are advised to apply the available RIOT OS update to address the vulnerability promptly.

Long-Term Security Practices

Maintain regular software updates and security patches to prevent similar vulnerabilities in the future.

Patching and Updates

Ensure timely application of security patches and updates to mitigate the risk posed by CVE-2021-27427.