FILE-OFFICE -- Snort detected traffic targeting vulnerabilities in files belonging to the Microsoft Office suite of software (Excel, PowerPoint, Word, Visio, Access, Outlook, etc.).
FILE-OFFICE Microsoft Office directory traversal attempt
This event is generated when an attacker attempts to exploit a directory traversal vulnerability in Microsoft Office
Remote code execution
The rule is looking for the exploitation of the vulnerability when attempting to do directory traversal.
What To Look For
This rule alerts in the event an attacker attempts to directory traverse URL that points to Microsoft Office application
No public information
No known false positives
Cisco Talos Intelligence Group
MITRE ATT&CK Framework
Technique: User Execution
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
CVE-2019-0801A remote code execution vulnerability exists when Microsoft Office fails to properly handle certain files.To exploit the vulnerability, an attacker would have to convince a user to open a specially crafted URL file that points to an Excel or PowerPoint file that was also downloaded.The update addresses the vulnerability by correcting how Office handles these files., aka 'Office Remote Code Execution Vulnerability'.
||Ease of Access||LOW