All information products included in http://ics-cert.us-cert.gov 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 http://www.us-cert.gov/tlp/.
1. EXECUTIVE SUMMARY
- CVSS v3 10.0
- ATTENTION: Exploitable remotely/low skill level to exploit
- Vendor: ABB
- Equipment: Relion 670 Series
- Vulnerability: Path Traversal
2. RISK EVALUATION
Successful exploitation of this vulnerability may allow an attacker to read and delete files on the device.
3. TECHNICAL DETAILS
3.1 AFFECTED PRODUCTS
The following versions of Relion 670 series, a protection and control device, are affected:
- Relion 670 series versions 1p1r26 and prior
- Relion 670 series versions 22.214.171.124 and prior
- Relion 670 series versions 126.96.36.199 and prior (RES670 188.8.131.52 and prior)
- Relion 670 series versions 184.108.40.206 and prior
3.2 VULNERABILITY OVERVIEW
An attacker could use specially crafted paths in a specific request to read or delete files from the device outside the intended directory.
- CRITICAL INFRASTRUCTURE SECTORS: Critical Manufacturing, Energy
- COUNTRIES/AREAS DEPLOYED: Worldwide
- COMPANY HEADQUARTERS LOCATION: Switzerland
Kirill Nesterov of Kaspersky Lab reported this vulnerability to ABB.
ABB recommends users update to the following or later versions at earliest convenience if IEC 61850 is used:
- Relion 670 series version 1p1r27
- Relion 670 series version 220.127.116.11
- Relion 670 series version 18.104.22.168 (RES670 22.214.171.124)
- Relion 670 series version 126.96.36.199
Updates can be ordered by email at: email@example.com
The only known workaround for this vulnerability is to disable IEC 61850 protocol when not in use. If this is not possible, ABB recommends having a proper security architecture that divides the system in different security zones, and revising the firewall configurations to limit the usage of MMS protocol to the relevant upper networks.
IEC 61850 MMS protocol uses Port 102/TCP.
ABB also recommends that these and other proper security practices and firewall configurations (including VPN) be implemented to help protect a process control network from attacks originating outside the network:
- Process control systems are physically protected from direct access by unauthorized personnel.
- Process control systems have no direct connections to the Internet.
- Process control systems are separated from other networks by means of a firewall system that has a minimal number of ports/services exposed.
- Process control systems should not be used for Internet surfing, instant messaging, or receiving e-mails.
- Portable computers and removable storage media should be carefully scanned for viruses before they are connected to a control system.
- If IEC 61850 protocol isn’t used, make sure it is disabled. This removes the vulnerability.
For more information see the ABB Cybersecurity Advisory 1MRG024910
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.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.gov 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 CISA for tracking and correlation against other incidents.
No known public exploits specifically target this vulnerability.
For any questions related to this report, please contact the NCCIC at:
Toll Free: 1-888-282-0870
The NCCIC continuously strives to improve its products and services. You can help by choosing one of the links below to provide feedback about this product.