CVE-2021-37164 : Exploit Details and Defense Strategies

A buffer overflow vulnerability was identified in the HMI3 Control Panel of Swisslog Healthcare Nexus Panel. This flaw exists in software versions prior to Nexus Software 7.2.5.7, allowing a stack-based buffer overflow through an off-by-3 condition in the tcpTxThread function.

Understanding CVE-2021-37164

This section will delve into the specifics of CVE-2021-37164, shedding light on its nature and implications.

What is CVE-2021-37164?

CVE-2021-37164 refers to a buffer overflow issue found in the HMI3 Control Panel of Swisslog Healthcare Nexus Panel before version 7.2.5.7. The vulnerability occurs due to an off-by-3 condition in the tcpTxThread function, leading to a stack-based buffer overflow.

The Impact of CVE-2021-37164

Exploitation of this vulnerability could allow an attacker to execute arbitrary code or cause a denial of service by crashing the affected system.

Technical Details of CVE-2021-37164

In this section, we will explore the technical aspects of CVE-2021-37164, including its description, affected systems, versions, and exploitation mechanism.

Vulnerability Description

The vulnerability arises from the copying of received data to a stack buffer in the tcpTxThread function, where an off-by-3 condition can trigger a stack-based buffer overflow.

Affected Systems and Versions

The vulnerability impacts Swisslog Healthcare Nexus Panel running software versions before Nexus Software 7.2.5.7.

Exploitation Mechanism

Attackers can exploit this vulnerability by crafting a malicious payload to trigger the stack-based buffer overflow, potentially leading to arbitrary code execution or system crashes.

Mitigation and Prevention

This section will focus on the steps organizations can take to mitigate the risks posed by CVE-2021-37164 and prevent potential exploitation.

Immediate Steps to Take

Organizations are advised to update their Swisslog Healthcare Nexus Panel to version 7.2.5.7 or later to address the vulnerability and prevent exploitation.

Long-Term Security Practices

Implementing secure coding practices, regular security assessments, and promptly applying security patches can enhance the overall security posture of the affected systems.

Patching and Updates

Regularly monitor for security updates from Swisslog Healthcare and apply patches promptly to safeguard against potential vulnerabilities.