CVE-2021-26730 : What You Need to Know

A stack-based buffer overflow vulnerability in a subfunction of the Login_handler_func function of spx_restservice allows an attacker to execute arbitrary code with the same privileges as the server user (root). This vulnerability affects Lanner Inc IAC-AST2500A standard firmware version 1.10.0.

Understanding CVE-2021-26730

This section will provide insights into the details, impact, technical aspects, and mitigation strategies related to CVE-2021-26730.

What is CVE-2021-26730?

CVE-2021-26730 is a critical stack-based buffer overflow vulnerability in a subfunction of the Login_handler_func function of spx_restservice that allows attackers to execute arbitrary code with root-level privileges.

The Impact of CVE-2021-26730

This vulnerability poses a significant risk as it can be exploited by threat actors to compromise the affected system, leading to unauthorized code execution and potential system takeover.

Technical Details of CVE-2021-26730

This section will delve into the specifics of the vulnerability, including its description, affected systems, versions, and exploitation mechanism.

Vulnerability Description

The vulnerability arises from a stack-based buffer overflow in a subfunction of the Login_handler_func function of spx_restservice, enabling attackers to execute malicious code with elevated privileges.

Affected Systems and Versions

The vulnerability impacts Lanner Inc IAC-AST2500A standard firmware version 1.10.0.

Exploitation Mechanism

Attackers can exploit this vulnerability to trigger the buffer overflow and execute arbitrary code with root-level privileges, potentially compromising the integrity and availability of the system.

Mitigation and Prevention

In this section, we will discuss the immediate steps to take, long-term security practices, and the importance of timely patching and updates.

Immediate Steps to Take

To mitigate the risk associated with CVE-2021-26730, it is crucial to apply security patches provided by the vendor, restrict access to vulnerable services, and monitor for any suspicious activities.

Long-Term Security Practices

Implementing secure coding practices, conducting regular security assessments, and maintaining a robust incident response plan are essential for enhancing the overall security posture.

Patching and Updates

Regularly check for firmware updates and security advisories from Lanner Inc, and promptly apply patches to address known vulnerabilities and strengthen the security of the affected systems.