External risk intelligence

Trend Micro OfficeScan File Extraction Vulnerability.

CVE advisoryKnown Exploit

CVE-2019-18187

Trend Micro OfficeScan is affected by a directory traversal flaw, enabling authenticated attackers to extract files and potentially execute remote code. This poses a risk to business operations and data security.

4Halo Surface Signal

Path Traversal

Trendmicro Officescan

11.0xg

External exposure likelihood

Halo Surface Signal score for CVE-2019-18187

Trend Micro OfficeScan is an enterprise security management server typically deployed to manage endpoints across a network. While these servers are primarily internal, they are frequently configured to be network-reachable to support remote clients and agents, often acting as a centralized management service that occupies a position of network visibility within an organization.

Horizon Alert

Summary of the vulnerability and why it matters

Trend Micro OfficeScan versions 11.0 and XG are susceptible to a directory traversal vulnerability. This flaw allows an authenticated attacker to extract files from a zip archive to a designated folder on the OfficeScan server. Such an action could potentially lead to the execution of malicious code on the server.

  • Vulnerable Trend Micro OfficeScan
  • Flaw allows arbitrary file extraction
  • Potential for remote code execution

Attack Path

How an attacker could exploit the issue

An attacker with authenticated access could exploit a directory traversal vulnerability in Trend Micro OfficeScan. This would allow an attacker to extract files from a zip archive to a designated folder on the OfficeScan server. The extracted files could potentially lead to the execution of remote code, depending on the permissions associated with the web service account.

  • Authentication required for access.
  • Attacker extracts arbitrary zip file.
  • Control or impact: remote code execution.

Live Threat

Current exploitation, exposure, and threat context

This vulnerability presents a significant risk as it allows for the potential execution of arbitrary code on the OfficeScan server. Exploitation could lead to the compromise of sensitive data and disruption of business operations. The vulnerability requires successful user authentication to be exploited, and the impact of remote code execution is dependent on the permissions of the web service account.

  • Attackers may possess moderate skill.
  • User authentication is required for exploitation.
  • Business risk is high, necessitating urgent attention.

Priority actions

Operational Fix

Recommended remediation, mitigation, and detection steps

A directory traversal vulnerability in Trend Micro OfficeScan versions 11.0 and XG (12.0) could allow an authenticated attacker to extract arbitrary files to a specific folder on the server. This could potentially lead to remote code execution, depending on the permissions of the web service account. The impact to an organization includes risk to business operations and data security if an attacker gains unauthorized access to systems.

  • Identify OfficeScan servers.
  • Reduce network exposure to servers.
  • Apply vendor updates; validate fix.

Frequently asked questions

What is Trend Micro OfficeScan?

Trend Micro OfficeScan is an enterprise security product designed to protect network endpoints, such as computers and servers, from various threats like malware, viruses, and spyware. It features a client-server architecture with a management console for policy deployment and updates.

What type of vulnerability is CVE-2019-18187 in OfficeScan?

CVE-2019-18187 is a directory traversal vulnerability within Trend Micro OfficeScan. This weakness allows an attacker to extract files from a ZIP archive to a specific folder on the OfficeScan server, potentially leading to remote code execution.

What is required for an attacker to exploit the OfficeScan vulnerability CVE-2019-18187?

To exploit CVE-2019-18187, an attacker must first be authenticated to the OfficeScan server. They would then use a specially crafted ZIP archive, possibly containing 'dot dot' sequences, to perform the directory traversal and extract files to unintended locations.

Why is CVE-2019-18187 considered a significant risk for organizations?

This vulnerability poses a significant risk because it enables remote code execution on the OfficeScan server, which is a critical network management component. Successful exploitation could lead to a compromise of sensitive data and disruption of business operations, making timely remediation crucial. This is why it is listed in CISA's Known Exploited Vulnerabilities Catalog.

How can organizations address the CVE-2019-18187 vulnerability in OfficeScan?

Organizations should apply the latest Critical Patches (CPs) or updates released by Trend Micro for affected OfficeScan versions (11.0 SP1 and XG). Regularly checking for and applying vendor updates is essential for mitigating this and other security risks.

References