CVE-2021-35392 : Vulnerability Insights and Analysis

Realtek Jungle SDK version v2.x up to v3.4.14B is vulnerable to a heap buffer overflow due to the unsafe crafting of SSDP NOTIFY messages from received M-SEARCH messages ST header.

Understanding CVE-2021-35392

This CVE pertains to a vulnerability in the 'WiFi Simple Config' server of Realtek Jungle SDK, exposing systems to heap buffer overflow.

What is CVE-2021-35392?

The vulnerability arises from the unsafe handling of SSDP NOTIFY messages, potentially leading to a heap buffer overflow.

The Impact of CVE-2021-35392

Exploitation of this vulnerability could allow attackers to execute arbitrary code or crash the server, compromising system integrity and availability.

Technical Details of CVE-2021-35392

The vulnerability affects Realtek Jungle SDK versions up to v3.4.14B, where the server can be compromised through crafted SSDP messages.

Vulnerability Description

The vulnerability is a heap buffer overflow allowing attackers to disrupt the system by exploiting SSDP NOTIFY messages.

Affected Systems and Versions

Realtek Jungle SDK version v2.x up to v3.4.14B are impacted by this vulnerability.

Exploitation Mechanism

Attackers exploit the vulnerability by crafting malicious SSDP NOTIFY messages to trigger a heap buffer overflow.

Mitigation and Prevention

To mitigate the risks associated with CVE-2021-35392, immediate actions and long-term security measures are crucial.

Immediate Steps to Take

Apply vendor-supplied patches or security updates promptly.
Implement network segmentation and access control to limit exposure.

Long-Term Security Practices

Regularly update and patch all software and firmware to address vulnerabilities.
Conduct security assessments and audits to identify and remediate potential weaknesses.

Patching and Updates

Stay informed about security advisories and best practices from Realtek to ensure timely patching and protection of systems.