CVE-2022-23971: asus rt-ax56u_firmware Path Traversal

Vulnerability summary

CVE-2022-23971 is a high (CVSS 8.1) Path Traversal vulnerability in asus rt-ax56u_firmware. EPSS estimates a 0.45% chance of exploitation in the next 30 days, higher than 37.8% of scored vulnerabilities.

Timeline

1. 07-04-2022
   PublishedVulnerability first disclosed.
2. 17-09-2024
   Last modifiedVulnerability information updated.

Description

ASUS RT-AX56U’s update_PLC/PORT file has a path traversal vulnerability due to insufficient filtering for special characters in the URL parameter. An unauthenticated LAN attacker can overwrite a system file by uploading another PLC/PORT file with the same file name, which results in service disruption.

• CWE-22Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory.