CVE-2021-39995 : What You Need to Know

This CVE article provides details about a vulnerability in Huawei products using OpenHpi software for hardware management.

Understanding CVE-2021-39995

This section covers the vulnerability description, affected systems, exploitation method, and mitigation steps.

What is CVE-2021-39995?

Huawei products utilizing the OpenHpi software are susceptible to an out-of-bounds read flaw leading to a denial of service.

The Impact of CVE-2021-39995

The vulnerability could allow attackers to trigger a denial of service by exploiting the out-of-bounds read weakness.

Technical Details of CVE-2021-39995

This section delves into the specifics of the vulnerability.

Vulnerability Description

The flaw lies in a function that processes data from OpenHpi, resulting in an out-of-bounds read vulnerability.

Affected Systems and Versions

Affected Products: eCNS280_TD, eSE620X vESS
Vulnerable Versions: V100R005C10, V100R001C10SPC200, V100R001C20SPC200, V200R001C00SPC300

Exploitation Mechanism

The vulnerability can be exploited by manipulating data returned by OpenHpi, potentially leading to a denial of service.

Mitigation and Prevention

Below are steps to mitigate the risk posed by CVE-2021-39995.

Immediate Steps to Take

Apply vendor-supplied patches immediately.
Monitor vendor notifications for security updates.
Implement network security best practices.

Long-Term Security Practices

Regularly update and patch all software components.
Conduct thorough security assessments and audits.
Educate users about security best practices.
Implement network segmentation to contain potential attacks.

Patching and Updates

Keep all affected Huawei products updated with the latest security patches.
Regularly check for security advisories from the vendor.
Test patches in a controlled environment before deployment.