ICS Advisory (ICSA-22-321-01)

Red Lion Crimson

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1. EXECUTIVE SUMMARY

  • CVSS v3 7.5
  • ATTENTION: Exploitable remotely/low attack complexity
  • Vendor: Red Lion Controls
  • Equipment: Crimson
  • Vulnerability: Path Traversal

2. RISK EVALUATION

Successful exploitation of this vulnerability could allow an attacker to obtain user credential hashes.

3. TECHNICAL DETAILS

3.1 AFFECTED PRODUCTS

The following versions of Crimson, a programming software for various controllers, HMIs, and modules are affected:

  • Crimson 3.0: Version 707.000 and prior
  • Crimson 3.1: Version 3126.001 and prior
  • Crimson 3.2: Version 3.2.0044.0 and prior

3.2 VULNERABILITY OVERVIEW

3.2.1    IMPROPER LIMITATION OF A PATHNAME TO A RESTRICTED DIRECTORY ('PATH TRAVERSAL') CWE-22

Red Lion Controls Crimson 3.0 versions 707.000 and prior, Crimson 3.1 versions 3126.001 and prior, and Crimson 3.2 versions 3.2.0044.0 and prior are vulnerable to path traversal. When attempting to open a file using a specific path, the user's password hash is sent to an arbitrary host. This could allow an attacker to obtain user credential hashes.

CVE-2022-3090 has been assigned to this vulnerability. A CVSS v3 base score of 7.5 has been assigned; the CVSS vector string is (AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N).

3.3 BACKGROUND

  • CRITICAL INFRASTRUCTURE SECTORS: Multiple Sectors
  • COUNTRIES/AREAS DEPLOYED: Worldwide
  • COMPANY HEADQUARTERS LOCATION: United States

3.4 RESEARCHER

Dragos reported this vulnerability to Red Lion Controls, who reported this vulnerability to CISA.

4. MITIGATIONS

Red Lion Controls recommends updating to the following versions or later:

  • Crimson 3.0: Version 711.00
  • Crimson 3.1: Version 3126.02
  • Crimson 3.2: Version 3.0045

Red Lion Controls also recommends the following guidelines to reduce the risk of this vulnerability:

  • Users should avoid opening files originating from outside the organization.
  • Users should verify files come from a trusted source prior to opening.

For more information and details, see Red Lion Security Bulletin RLCSB-2022ST31.

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

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

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

CISA also provides a section for control systems security recommended practices on the ICS webpage at cisa.gov/ics. Several CISA products detailing cyber defense best 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 webpage at cisa.gov/ics in the technical information paper, ICS-TIP-12-146-01B--Targeted Cyber Intrusion Detection and Mitigation Strategies.

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

No known public exploits specifically target this vulnerability.


Contact Information

For any questions related to this report, please contact the CISA at:

Email: CISAservicedesk@cisa.dhs.gov
Toll Free: 1-888-282-0870

For industrial control systems cybersecurity information:  https://us-cert.cisa.gov/ics 
or incident reporting:  https://us-cert.cisa.gov/report

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