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AUSCERT External Security Bulletin Redistribution
Advisory (icsa-21-005-04) Red Lion Crimson 3.1
6 January 2021
AusCERT Security Bulletin Summary
Product: Red Lion Crimson 3.1
Operating System: Windows
Impact/Access: Modify Arbitrary Files -- Remote/Unauthenticated
Denial of Service -- Remote/Unauthenticated
Access Confidential Data -- Remote/Unauthenticated
CVE Names: CVE-2020-27285 CVE-2020-27283 CVE-2020-27279
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ICS Advisory (ICSA-21-005-04)
Red Lion Crimson 3.1
Original release date: January 05, 2021
All information products included in https://us-cert.cisa.gov/ics are provided
"as is" for informational purposes only. The Department of Homeland Security
(DHS) does not provide any warranties of any kind regarding any information
contained within. DHS does not endorse any commercial product or service,
referenced in this product or otherwise. Further dissemination of this product
is governed by the Traffic Light Protocol (TLP) marking in the header. For more
information about TLP, see https://us-cert.cisa.gov/tlp/ .
1. EXECUTIVE SUMMARY
o CVSS v3 7.5
o ATTENTION: Exploitable remotely/low skill level to exploit
o Vendor: Red Lion
o Equipment: Crimson 3.1
o Vulnerabilities: NULL Pointer Dereference, Missing Authentication for
Critical Function, Improper Resource Shutdown or Release
2. RISK EVALUATION
Successful exploitation of these vulnerabilities could allow an attacker to
create a denial-of-service condition, read and modify the database, and leak
3. TECHNICAL DETAILS
3.1 AFFECTED PRODUCTS
The following versions of Crimson 3.1 for the DA10D Protocol Converter are
o Crimson 3.1: Build versions prior to 3119.001
3.2 VULNERABILITY OVERVIEW
3.2.1 NULL POINTER DEREFERENCE CWE-476
A NULL pointer deference vulnerability has been identified in the protocol
converter. An attacker could send a specially crafted packet that could reboot
CVE-2020-27279 has been assigned to this vulnerability. A CVSS v3 base score of
7.5 has been calculated; the CVSS vector string is ( AV:N/AC:L/PR:N/UI:N/S:U/
3.2.2 MISSING AUTHENTICATION FOR CRITICAL FUNCTION CWE-306
The default configuration of the affected product allows a user to be able to
read and modify the database without authentication.
CVE-2020-27285 has been assigned to this vulnerability. A CVSS v3 base score of
6.5 has been calculated; the CVSS vector string is ( AV:N/AC:L/PR:N/UI:N/S:U/
3.2.3 IMPROPER RESOURCE SHUTDOWN OR RELEASE CWE-404
An attacker could send a specially crafted message that could leak arbitrary
CVE-2020-27283 has been assigned to this vulnerability. A CVSS v3 base score of
4.3 has been calculated; the CVSS vector string is ( AV:A/AC:L/PR:N/UI:N/S:U/
o CRITICAL INFRASTRUCTURE SECTORS: Critical Manufacturing
o COUNTRIES/AREAS DEPLOYED: Worldwide
o COMPANY HEADQUARTERS LOCATION: United States
Marco Balduzzi, Ryan Flores, Philippe Lin, Charles Perine, Ryan Flores, Rainer
Vosseler working with Trend Micro Zero Day Initiative reported these
vulnerabilities to CISA.
Red Lion recommends users update to build 3119.001 or later .
CISA recommends users take defensive measures to minimize the risk of
exploitation of this vulnerability. Specifically, users should:
o Minimize network exposure for all control system devices and/or systems,
and ensure that they are not accessible from the Internet .
o Locate control system networks and remote devices behind firewalls, and
isolate them from the business network.
o 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.
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 on us-cert.cisa.gov . 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 webpage on us-cert.cisa.gov in the Technical Information Paper,
ICS-TIP-12-146-01B--Targeted Cyber Intrusion Detection and Mitigation
Organizations observing any suspected malicious activity should follow their
established internal procedures and report their findings to CISA for tracking
and correlation against other incidents.
No known public exploits specifically target these vulnerabilities.
For any questions related to this report, please contact the CISA at:
Toll Free: 1-888-282-0870
CISA continuously strives to improve its products and services. You can help by
choosing one of the links below to provide feedback about this product.
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