CVE-2021-34828 : Security Advisory and Response

This CVE-2021-34828 article provides details about a vulnerability that allows network-adjacent attackers to execute arbitrary code on affected D-Link DAP-1330 1.13B01 BETA routers without requiring authentication. The flaw is due to improper validation of user-supplied data in the SOAPAction HTTP header, leading to a buffer overflow.

Understanding CVE-2021-34828

This section covers the essential information regarding the vulnerability and its impact.

What is CVE-2021-34828?

CVE-2021-34828 is a security vulnerability that enables attackers within the same network to run malicious code on susceptible D-Link DAP-1330 1.13B01 BETA routers. Exploitation does not necessitate authentication and stems from inadequate checks on input data length before copying to a fixed buffer.

The Impact of CVE-2021-34828

The vulnerability poses a severe threat with a high base score of 8.8 under CVSS v3.0 metrics. Attackers can compromise confidentiality, integrity, and availability by executing arbitrary code, potentially leading to significant system compromise.

Technical Details of CVE-2021-34828

Explore the specific technical aspects of CVE-2021-34828, including the vulnerability description, affected systems, and exploitation mechanism.

Vulnerability Description

The flaw stems from improper handling of the SOAPAction HTTP header, allowing attackers to overflow a fixed-length buffer. By exploiting this weakness, threat actors can achieve code execution on the targeted device.

Affected Systems and Versions

The vulnerability affects installations of D-Link DAP-1330 routers running version 1.13B01 BETA. Users of this specific version should take immediate action to mitigate the risk of exploitation.

Exploitation Mechanism

Attackers leverage the lack of data length validation in the SOAPAction HTTP header to craft malicious requests that trigger a buffer overflow, ultimately enabling arbitrary code execution.

Mitigation and Prevention

Learn how to protect systems from CVE-2021-34828 through immediate steps and long-term security practices.

Immediate Steps to Take

To mitigate the risk of exploitation, users should apply security patches promptly, restrict network access, and monitor for any suspicious activities targeting D-Link DAP-1330 1.13B01 BETA routers.

Long-Term Security Practices

Implement strict input data validation, regularly update firmware and security configurations, conduct security assessments, and educate users on best cybersecurity practices to enhance overall network resilience.

Patching and Updates

D-Link users are advised to stay informed about security advisories, promptly install patches released by the vendor, and ensure their systems are up-to-date with the latest security fixes.