SERVER-WEBAPP -- Snort has detected traffic exploiting vulnerabilities in web based applications on servers.
SERVER-WEBAPP TP-Link Router Web Server directory traversal attempt
This is looking for access to the /fs endpoint that contains .. in it's path (i.e. /fs/../../../etc/passwd).
What To Look For
This rule alerts on a directory traversal attempt through the TP-LINK web interface.
Public information/Proof of Concept available
No known false positives
Cisco Talos Intelligence Group
MITRE ATT&CK Framework
Technique: Exfiltration Over Web Service
For reference, see the MITRE ATT&CK vulnerability types here:
A Directory Traversal attack targets HTTP traffic and allows the attacker to access directories outside the applications own, potentially exposing sensitive system files to leakage or overwriting. This is also known as Directory Climbing, Path Traversal, or Backtracking. An alert on this kind of attack indicates a vulnerability in security validation of user input that allows a "traverse to parent directory" or "../" command to pass through. Protect your site by filtering all user input, removing any characters but the allowed data.
CVE Additional Information