CVE-2021-26728 : Security Advisory and Response

A command injection and stack-based buffer overflow vulnerability in the KillDupUsr_func function of spx_restservice can allow an attacker to execute arbitrary code with root privileges. This affects Lanner Inc IAC-AST2500A standard firmware version 1.10.0.

Understanding CVE-2021-26728

This CVE involves critical vulnerabilities in the spx_restservice that could potentially lead to arbitrary code execution with elevated privileges.

What is CVE-2021-26728?

CVE-2021-26728 is a command injection and stack-based buffer overflow vulnerability in the KillDupUsr_func function of spx_restservice, impacting Lanner Inc IAC-AST2500A standard firmware version 1.10.0.

The Impact of CVE-2021-26728

The vulnerability allows an attacker to execute malicious code with the same privileges as the server user (root), posing a significant security risk to affected systems.

Technical Details of CVE-2021-26728

This section provides insights into the specific technical aspects of the CVE.

Vulnerability Description

The vulnerability in the KillDupUsr_func function of spx_restservice enables unauthorized execution of arbitrary code, potentially leading to system compromise.

Affected Systems and Versions

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

Exploitation Mechanism

By exploiting the command injection and buffer overflow flaws, threat actors can gain unauthorized access and execute malicious code with root privileges.

Mitigation and Prevention

Protecting systems from CVE-2021-26728 requires immediate action and long-term security measures.

Immediate Steps to Take

Implement vendor-recommended patches and updates promptly.
Restrict network access to vulnerable services.

Long-Term Security Practices

Regularly monitor and audit system logs for unusual activities.
Conduct security assessments and penetration testing to identify vulnerabilities.

Patching and Updates

Stay informed about security advisories from Lanner Inc and apply patches as soon as they are released to mitigate the risks associated with CVE-2021-26728.