CVE-2021-27435 : What You Need to Know
Learn about CVE-2021-27435, a critical vulnerability in ARM mbed product version 6.3.0, enabling integer wrap-around and arbitrary memory allocation. Read about the impact, technical details, and mitigation steps.
A detailed analysis of CVE-2021-27435, a vulnerability in ARM mbed product version 6.3.0 that poses a high severity risk due to an integer overflow issue in malloc_wrapper function.
Understanding CVE-2021-27435
This section will provide an overview of the CVE-2021-27435 vulnerability in ARM mbed product version 6.3.0.
What is CVE-2021-27435?
CVE-2021-27435 is a vulnerability in ARM mbed product version 6.3.0 that allows for integer wrap-around in the malloc_wrapper function, leading to arbitrary memory allocation and causing unexpected behaviors like crashes or remote code injection/execution.
The Impact of CVE-2021-27435
The vulnerability has a high severity base score of 7.3, posing a risk of remote code execution due to the integer overflow issue in ARM mbed version 6.3.0.
Technical Details of CVE-2021-27435
In this section, we delve into the technical aspects of CVE-2021-27435 in ARM mbed product version 6.3.0.
Vulnerability Description
ARM mbed product version 6.3.0 is susceptible to integer wrap-around in the malloc_wrapper function, enabling arbitrary memory allocation, which can result in crashes or remote code execution.
Affected Systems and Versions
The vulnerability impacts ARM mbed version 6.3.0, potentially affecting systems that utilize this specific version of the product.
Exploitation Mechanism
The vulnerability can be exploited by malicious actors to trigger the integer wrap-around in the malloc_wrapper function, leading to unauthorized memory allocation and subsequent code execution.
Mitigation and Prevention
This section outlines the steps to mitigate and prevent the exploitation of CVE-2021-27435 in ARM mbed product version 6.3.0.
Immediate Steps to Take
Users are advised to apply the available ARM Mbed OS update to address the vulnerability and enhance the security posture of the affected systems.
Long-Term Security Practices
Implementing secure coding practices and regularly updating software components are recommended for ensuring long-term security against vulnerabilities like CVE-2021-27435.
Patching and Updates
Stay informed about security updates from ARM Mbed and promptly apply patches to eliminate vulnerabilities and protect systems from potential exploits.