1. EXECUTIVE SUMMARY

  • CVSS v3 6.5
  • ATTENTION: Low skill level to exploit
  • Vendor: Gemalto
  • Equipment: Sentinel UltraPro
  • Vulnerability: Uncontrolled Search Path Element

2. RISK EVALUATION

Successful exploitation of this vulnerability could allow execution of unauthorized code or commands.

3. TECHNICAL DETAILS

3.1 AFFECTED PRODUCTS

The following versions of Sentinel UltraPro encryption keys are affected:

  • Sentinel UltraPro Client Library ux32w.dll Versions 1.3.0, 1.3.1, and 1.3.2

3.2 VULNERABILITY OVERVIEW

3.2.1    UNCONTROLLED SEARCH PATH ELEMENT CWE-427

The uncontrolled search path element vulnerability enables an attacker to load and execute a malicious file from the ux32w.dll in Sentinel UltraPro.

CVE-2019-6534 has been assigned to this vulnerability. A CVSS v3 base score of 6.5 has been calculated; the CVSS vector string is (AV:L/AC:L/PR:H/UI:R/S:U/C:H/I:H/A:H).

3.3 BACKGROUND

  • CRITICAL INFRASTRUCTURE SECTORS: Communications, Financial Services, Government Facilities, Healthcare and Public Health, Information Technology
  • COUNTRIES/AREAS DEPLOYED: Worldwide
  • COMPANY HEADQUARTERS LOCATION: Netherlands

3.4 RESEARCHER

ADLab of Venustech reported this vulnerability to NCCIC.

4. MITIGATIONS

Users who have Sentinel UltraPro Client Library ux32w.versions v1.3.0, v1.3.1 or v1.3.2 are advised to upgrade to Sentinel UtraPro v1.3.3 in order to enable this security update. The security update is found at the following link:

https://supportportal.gemalto.com/csm?id=kb_article_view&sysparm_article=KB0017694

For additional information, please see Gemalto’s security bulletin at:

https://sentinel.gemalto.com/technical-support/security-updates-sm/

NCCIC recommends users take defensive measures to minimize the risk of exploitation of this vulnerability. Specifically, users should:

  • Minimize network exposure for all control system devices and/or systems, and ensure that they are not accessible from the Internet.
  • Locate control system networks and remote devices behind firewalls, and isolate them from the business network.
  • When remote access is required, use secure methods, such as Virtual Private Networks (VPNs), recognizing that VPNs may have vulnerabilities and should be updated to the most current version available. Also recognize that VPN is only as secure as the connected devices.

NCCIC reminds organizations to perform proper impact analysis and risk assessment prior to deploying defensive measures.

NCCIC also provides a section for control systems security recommended practices on the ICS-CERT web page. Several recommended practices are available for reading and download, including Improving Industrial Control Systems Cybersecurity with Defense-in-Depth Strategies.

Additional mitigation guidance and recommended practices are publicly available on the ICS-CERT website in the Technical Information Paper, ICS-TIP-12-146-01B–Targeted Cyber Intrusion Detection and Mitigation Strategies.

Organizations observing any suspected malicious activity should follow their established internal procedures and report their findings to NCCIC for tracking and correlation against other incidents.

No known public exploits specifically target this vulnerability. This vulnerability is not exploitable remotely.

 

Source:

https://ics-cert.us-cert.gov/advisories/ICSA-19-073-02