CVE-2021-25134 : Exploit Details and Defense Strategies

This article provides insights into CVE-2021-25134, a vulnerability found in the Baseboard Management Controller(BMC) firmware of various HPE Cloudline servers.

Understanding CVE-2021-25134

This section delves into the details of the CVE, its impact, technical description, affected systems, and mitigation strategies.

What is CVE-2021-25134?

The Baseboard Management Controller(BMC) in HPE Cloudline servers has a local buffer overflow vulnerability in the spx_restservice setremoteimageinfo_func function.

The Impact of CVE-2021-25134

Exploitation of this vulnerability could allow an attacker to execute arbitrary code or crash the affected BMC, leading to a denial of service (DoS) condition.

Technical Details of CVE-2021-25134

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

Vulnerability Description

The vulnerability stems from a buffer overflow issue in the spx_restservice setremoteimageinfo_func function within the BMC firmware.

Affected Systems and Versions

The vulnerability affects several HPE Cloudline servers, including CL5800 Gen9, CL5200 Gen9, CL4100 Gen10, CL3100 Gen10, and CL5800 Gen10, running specific firmware versions.

Exploitation Mechanism

An attacker can exploit this vulnerability by sending specially crafted requests to the affected BMC, triggering the buffer overflow.

Mitigation and Prevention

This section outlines the immediate steps to take, long-term security practices, and the importance of patching and updates.

Immediate Steps to Take

To mitigate the risk, users are advised to apply the patches provided by HPE and restrict network access to the BMC interface.

Long-Term Security Practices

Implementing network segmentation, regular security updates, and monitoring BMC activity can enhance the overall security posture.

Patching and Updates

It is crucial to stay informed about security advisories from HPE and promptly apply patches to address known vulnerabilities.