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AUSCERT External Security Bulletin Redistribution
ESB-2019.4483
Advisory (icsa-19-330-01) ABB Relion 670 Series
27 November 2019
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AusCERT Security Bulletin Summary
---------------------------------
Product: ABB Relion 670 Series
Publisher: ICS-CERT
Operating System: Network Appliance
Impact/Access: Delete Arbitrary Files -- Remote/Unauthenticated
Read-only Data Access -- Remote/Unauthenticated
Resolution: Patch/Upgrade
CVE Names: CVE-2019-18253
Original Bulletin:
https://www.us-cert.gov/ics/advisories/icsa-19-330-01
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ICS Advisory (ICSA-19-330-01)
ABB Relion 670 Series
Original release date: November 26, 2019
1. EXECUTIVE SUMMARY
o CVSS v3 10.0
o ATTENTION: Exploitable remotely/low skill level to exploit
o Vendor: ABB
o Equipment: Relion 670 Series
o 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:
o Relion 670 series versions 1p1r26 and prior
o Relion 670 series versions 1.2.3.17 and prior
o Relion 670 series versions 2.0.0.10 and prior (RES670 2.0.0.4 and prior)
o Relion 670 series versions 2.1.0.1 and prior
3.2 VULNERABILITY OVERVIEW
3.2.1 IMPROPER LIMITATION OF A PATHNAME TO A RESTRICTED DIRECTORY ('PATH
TRAVERSAL') CWE-22
An attacker could use specially crafted paths in a specific request to read or
delete files from the device outside the intended directory.
CVE-2019-18253 has been assigned to this vulnerability. A CVSS v3 base score of
10.0 has been calculated; the CVSS vector string is ( AV:N/AC:L/PR:N/UI:N/S:C/
C:H/I:H/A:H ).
3.3 BACKGROUND
o CRITICAL INFRASTRUCTURE SECTORS: Critical Manufacturing, Energy
o COUNTRIES/AREAS DEPLOYED: Worldwide
o COMPANY HEADQUARTERS LOCATION: Switzerland
3.4 RESEARCHER
Kirill Nesterov of Kaspersky Lab reported this vulnerability to ABB.
4. MITIGATIONS
ABB recommends users update to the following or later versions at earliest
convenience if IEC 61850 is used:
o Relion 670 series version 1p1r27
o Relion 670 series version 1.2.3.18
o Relion 670 series version 2.0.0.11 (RES670 2.0.0.5)
o Relion 670 series version 2.1.0.2
Updates can be ordered by email at: sa.t-supportline@se.abb.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:
o Process control systems are physically protected from direct access by
unauthorized personnel.
o Process control systems have no direct connections to the Internet.
o Process control systems are separated from other networks by means of a
firewall system that has a minimal number of ports/services exposed.
o Process control systems should not be used for Internet surfing, instant
messaging, or receiving e-mails.
o Portable computers and removable storage media should be carefully scanned
for viruses before they are connected to a control system.
o 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.
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