CVE-2023-33633 : Security Advisory and Response

Understanding CVE-2023-33633

A critical vulnerability was found in the H3C Magic R300 version R300-2100MV100R004, allowing for a stack overflow through the UpdateWanParams interface.

What is CVE-2023-33633?

CVE-2023-33633 is a security flaw in the H3C Magic R300 router software version R300-2100MV100R004 that enables malicious actors to conduct a stack overflow attack by exploiting the UpdateWanParams interface located at /goform/aspForm.

The Impact of CVE-2023-33633

This vulnerability could be exploited by attackers to potentially execute arbitrary code or cause a denial of service (DoS) condition on affected systems, posing a significant risk to confidentiality, integrity, and availability.

Technical Details of CVE-2023-33633

The technical details of the CVE-2023-33633 vulnerability are as follows:

Vulnerability Description

The vulnerability allows threat actors to overload the stack memory through the UpdateWanParams interface, which can lead to remote code execution or system crashes.

Affected Systems and Versions

H3C Magic R300 router software version R300-2100MV100R004 is confirmed to be affected by this vulnerability.

Exploitation Mechanism

The vulnerability is exploited by sending crafted requests to the UpdateWanParams interface, triggering the stack overflow condition and potentially gaining unauthorized access or disrupting the system.

Mitigation and Prevention

To mitigate the risks associated with CVE-2023-33633, follow these guidelines:

Immediate Steps to Take

Disable the UpdateWanParams interface if not required for essential operations.
Apply network-level controls and implement strong access restrictions to limit exposure.

Long-Term Security Practices

Regularly monitor vendor security advisories for patches or updates addressing this vulnerability.
Conduct security assessments and penetration testing to identify and remediate potential weaknesses in the network infrastructure.

Patching and Updates

Ensure timely installation of patches and updates released by H3C to address the CVE-2023-33633 vulnerability and enhance the overall security posture of the network.