CVE-2021-27432 : Vulnerability Insights and Analysis
Discover details of CVE-2021-27432 affecting OPC Foundation UA .NET Standard versions and Legacy, allowing stack overflow attacks. Learn about impact, mitigation, and prevention methods.
This article provides detailed information about CVE-2021-27432, a vulnerability in OPC Foundation OPC UA .NET Standard and OPC UA .NET Legacy that could lead to a stack overflow attack.
Understanding CVE-2021-27432
CVE-2021-27432 is a security vulnerability in OPC Foundation UA .NET Standard versions prior to 1.4.365.48 and OPC UA .NET Legacy, allowing uncontrolled recursion leading to a stack overflow.
What is CVE-2021-27432?
CVE-2021-27432 affects OPC Foundation UA .NET Standard versions prior to 1.4.365.48 and OPC UA .NET Legacy, enabling an attacker to trigger a stack overflow through uncontrolled recursion.
The Impact of CVE-2021-27432
The vulnerability could be exploited by attackers to execute arbitrary code, disrupt services, or cause denial of service by triggering a stack overflow in affected systems.
Technical Details of CVE-2021-27432
The following technical details provide insights into the vulnerability, affected systems, and exploitation mechanisms.
Vulnerability Description
OPC Foundation UA .NET Standard versions prior to 1.4.365.48 and OPC UA .NET Legacy are prone to uncontrolled recursion, facilitating a stack overflow attack.
Affected Systems and Versions
The vulnerability impacts OPC Foundation UA .NET Standard versions before 1.4.365.48 and OPC UA .NET Legacy, making systems running these versions susceptible to exploitation.
Exploitation Mechanism
Attackers can exploit the uncontrolled recursion flaw in OPC Foundation OPC UA .NET Standard and OPC UA .NET Legacy to trigger a stack overflow, potentially leading to security breaches.
Mitigation and Prevention
To safeguard systems from CVE-2021-27432, prompt actions must be taken to mitigate the risk and prevent potential security incidents.
Immediate Steps to Take
Ensure immediate patching of affected systems with the latest updates and security fixes provided by the vendor to address the vulnerability.
Long-Term Security Practices
Implement security best practices, such as regular security audits, network segmentation, and access control, to enhance overall security posture and prevent similar vulnerabilities.
Patching and Updates
Regularly check for security advisories from OPC Foundation and apply patches promptly to eliminate vulnerabilities and enhance system security.