CVE-2021-28202 : Vulnerability Insights and Analysis

This article explores CVE-2021-28202, a vulnerability in ASUS BMC firmware that allows remote attackers to exploit a buffer overflow in the Service configuration-2 function.

Understanding CVE-2021-28202

In CVE-2021-28202, ASUS BMC firmware is susceptible to a buffer overflow due to inadequate verification of user-entered string lengths.

What is CVE-2021-28202?

The Service configuration-2 function in ASUS BMC firmware's Web management page lacks proper string length validation, leading to a buffer overflow vulnerability.

The Impact of CVE-2021-28202

Remote attackers can exploit this vulnerability to gain privileged access and disrupt the Web service through abnormal termination.

Technical Details of CVE-2021-28202

This section delves into the specifics of the vulnerability, affected systems, and exploitation mechanisms.

Vulnerability Description

The vulnerability arises from the lack of validation for user-entered string lengths in ASUS BMC firmware, enabling a buffer overflow.

Affected Systems and Versions

Numerous ASUS products with specific firmware versions are affected, such as BMC firmware for RS720A-E9-RS24-E v1.10.3 and RS700-E9-RS4 v1.09.

Exploitation Mechanism

Remote attackers with high privileges can trigger the buffer overflow to gain unauthorized access and disrupt Web services.

Mitigation and Prevention

Learn how to address and prevent the CVE-2021-28202 vulnerability in ASUS BMC firmware.

Immediate Steps to Take

Update affected ASUS BMC firmware to secure versions like ESC4000 G4X 1.15.6 and RS700-E9-RS12 1.15.4.

Long-Term Security Practices

Implement regular firmware updates and robust security measures to prevent future vulnerabilities.

Patching and Updates

To thwart potential exploits, promptly install firmware patches provided by ASUS.