CVE-2019-18187: Trend Micro OfficeScan Directory Traversal Vulnerability

Vulnerability summary

CVE-2019-18187 is a high (CVSS 8.8) Path Traversal vulnerability in Trend Micro OfficeScan. It is known to be exploited: CISA lists it, first on 03-11-2021. EPSS estimates a 25.12% chance of exploitation in the next 30 days, higher than 97.9% of scored vulnerabilities.

Timeline

1. 28-10-2019
   PublishedVulnerability first disclosed.
2. 03-11-2021
   Added to CISA KEVTrend Micro OfficeScan Directory Traversal Vulnerability
3. 03-05-2022
   CISA remediation dueApply updates per vendor instructions.
4. 29-10-2025
   Last modifiedVulnerability information updated.

Description

Trend Micro OfficeScan versions 11.0 and XG (12.0) could be exploited by an attacker utilizing a directory traversal vulnerability to extract files from an arbitrary zip file to a specific folder on the OfficeScan server, which could potentially lead to remote code execution (RCE). The remote process execution is bound to a web service account, which depending on the web platform used may have restricted permissions. An attempted attack requires user authentication.

• 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.