CVE-2021-27417 : Vulnerability Insights and Analysis

This CVE-2021-27417 involves an integer overflow or wraparound vulnerability in eCosCentric eCosPro RTOS versions 2.0.1 through 4.5.3, potentially leading to a heap-based buffer overflow.

Understanding CVE-2021-27417

This section will cover the details of the CVE-2021-27417 vulnerability, its impact, technical details, and mitigation steps.

What is CVE-2021-27417?

eCosCentric eCosPro RTOS Versions 2.0.1 through 4.5.3 are susceptible to an integer wraparound in the calloc function, resulting in arbitrary memory allocation, which could trigger a heap-based buffer overflow.

The Impact of CVE-2021-27417

The vulnerability has a CVSS base score of 4.6 (Medium severity) with a high attack complexity and vector that is local. It can potentially lead to heap-based buffer overflow in affected systems.

Technical Details of CVE-2021-27417

Let's delve into the technical specifics of this vulnerability.

Vulnerability Description

The flaw arises from an integer wraparound issue in the calloc function, allowing unverified memory allocation that could be exploited for arbitrary memory assignment, leading to a heap-based buffer overflow.

Affected Systems and Versions

eCosCentric eCosPro RTOS versions 2.0.1 through 4.5.3 are impacted by this vulnerability.

Exploitation Mechanism

Attackers can exploit this vulnerability by triggering an integer wraparound in the calloc function, causing a heap-based buffer overflow in the affected systems.

Mitigation and Prevention

To safeguard your systems from CVE-2021-27417, consider the following mitigation strategies:

Immediate Steps to Take

Update eCosCentric eCosPro RTOS to version 4.5.4 or newer, as a patch addressing this vulnerability is available.

Long-Term Security Practices

Implement secure coding practices and conduct regular security audits to detect and prevent similar vulnerabilities in the future.

Patching and Updates

Stay vigilant for security updates from eCosCentric and promptly apply patches to ensure your systems are protected against known vulnerabilities.