CVE-2022-23970 : What You Need to Know

ASUS RT-AX56U experienced a path traversal vulnerability in its update_json function, allowing unauthenticated LAN attackers to overwrite system files and disrupt services.

Understanding CVE-2022-23970

This vulnerability affects ASUS RT-AX56U routers, posing a risk of unauthorized file manipulation.

What is CVE-2022-23970?

The flaw in ASUS RT-AX56U's update_json function lets LAN attackers overwrite system files by uploading a file with the same name, causing service disruptions.

The Impact of CVE-2022-23970

With a CVSS base score of 8.1 (High Severity), this vulnerability enables adjacent network attackers to compromise system integrity without requiring user interaction.

Technical Details of CVE-2022-23970

The vulnerability is categorized as CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal').

Vulnerability Description

Insufficient filtering of special characters in the URL parameter facilitates path traversal, allowing attackers to overwrite crucial system files.

Affected Systems and Versions

The vulnerability impacts ASUS RT-AX56U routers running firmware version 3.0.0.4.386.45898.

Exploitation Mechanism

Unauthenticated LAN attackers can exploit the flaw to upload files with malicious content, leading to system file overwrites and service disruption.

Mitigation and Prevention

Taking immediate action to update the firmware and implement long-term security practices is crucial to mitigating and preventing this vulnerability.

Immediate Steps to Take

Update the ASUS RT-AX56U firmware to version 3.0.0.4.386.45934 to patch the vulnerability and prevent unauthorized file manipulation.

Long-Term Security Practices

Regularly update firmware, follow security best practices, and monitor for any suspicious activities to enhance the overall security posture.

Patching and Updates

Stay informed about security updates from ASUS and promptly apply patches to safeguard against emerging threats.