CVE-2022-43647 : Vulnerability Insights and Analysis

This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of D-Link DIR-825 1.0.9/EE routers without requiring authentication. The specific flaw exists within the xupnpd service, enabling attackers to exploit a user-supplied string to execute a system call and gain admin user access.

Understanding CVE-2022-43647

This section provides insight into the impact, technical details, and mitigation strategies related to CVE-2022-43647.

What is CVE-2022-43647?

The vulnerability in D-Link DIR-825 1.0.9/EE routers allows attackers in proximity to execute code on affected systems through the xupnpd service on TCP port 4044. By exploiting a lack of proper user input validation, attackers can run arbitrary code as an admin user.

The Impact of CVE-2022-43647

The vulnerability poses a high-risk scenario with a CVSS base score of 8.8 (High). Attackers can achieve High impacts on confidentiality, integrity, and availability of affected systems without needing any user interaction, making it critical to address promptly.

Technical Details of CVE-2022-43647

This section delves into the vulnerability description, affected systems, versions, and the exploitation mechanism.

Vulnerability Description

The flaw arises from inadequate validation of user-supplied input within the xupnpd service, granting attackers the ability to execute arbitrary code as an admin user on D-Link DIR-825 1.0.9/EE routers.

Affected Systems and Versions

The vulnerability impacts D-Link DIR-825 routers specifically version 1.0.9, marking them as 'affected' installations.

Exploitation Mechanism

Attackers can exploit the lack of input validation in the xupnpd service on TCP port 4044 to execute malicious commands and gain unauthorized access to the affected router.

Mitigation and Prevention

This section highlights immediate steps to secure systems, long-term security practices, and the importance of applying patches and updates.

Immediate Steps to Take

Secure the D-Link DIR-825 routers by restricting network access, monitoring for unusual activities, and applying temporary workarounds until a permanent fix is available.

Long-Term Security Practices

Promote secure coding practices, conduct regular security assessments, and ensure timely security updates and patches to prevent similar vulnerabilities in the future.

Patching and Updates

Stay informed about official security advisories from D-Link and apply patches provided by the vendor to remediate CVE-2022-43647 and strengthen the overall security posture of the network.