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AUSCERT External Security Bulletin Redistribution
ESB-2022.3460
Advisory (icsa-22-195-02) Siemens SICAM GridEdge
15 July 2022
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AusCERT Security Bulletin Summary
---------------------------------
Product: Siemens SICAM GridEdge
Publisher: ICS-CERT
Operating System: Network Appliance
Resolution: Patch/Upgrade
CVE Names: CVE-2022-34464
Original Bulletin:
https://us-cert.cisa.gov/ics/advisories/icsa-22-195-02
Comment: CVSS (Max): 6.3 CVE-2022-34464 (CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L)
CVSS Source: ICS-CERT
Calculator: https://www.first.org/cvss/calculator/3.0#CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
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ICS Advisory (ICSA-22-195-02)
Siemens SICAM GridEdge
Original release date: July 14, 2022
Legal Notice
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 6.3
o ATTENTION: Exploitable remotely/low attack complexity
o Vendor: Siemens
o Equipment: SICAM GridEdge
o Vulnerability: Exposure of Resource to Wrong Sphere
2. RISK EVALUATION
The SICAM GridEdge software contains an improper access control vulnerability,
which could allow persons with local access to the host system to inject an SSH
key.
3. TECHNICAL DETAILS
3.1 AFFECTED PRODUCTS
The following versions of SICAM GridEdge are affected:
o SICAM GridEdge Essential ARM (6MD7881-2AA30): All versions.
o SICAM GridEdge Essential Intel (6MD7881-2AA40): All versions prior to
v2.7.3
o SICAM GridEdge Essential with GDS ARM (6MD7881-2AA10): All versions.
o SICAM GridEdge Essential with GDS Intel(6MD7881-2AA20): All versions prior
to v2.7.3
3.2 VULNERABILITY OVERVIEW
3.2.1 EXPOSURE OF RESOURCE TO WRONG SPHERE CWE-668
Affected software uses an improperly protected file to import SSH keys.
Attackers with access to the filesystem of the host on which SICAM GridEdge
runs can inject a custom SSH key to that file.
CVE-2022-34464 has been assigned to this vulnerability. A CVSS v3 base score of
6.3 has been assigned; the CVSS vector string is ( AV:N/AC:L/PR:L/UI:N/S:U/C:L/
I:L/A:L ).
3.3 BACKGROUND
o CRITICAL INFRASTRUCTURE SECTORS: Energy
o COUNTRIES/AREAS DEPLOYED: Worldwide
o COMPANY HEADQUARTERS LOCATION: Germany
3.4 RESEARCHER
Siemens reported this vulnerability to CISA.
4. MITIGATIONS
Siemens recommends updating to the latest version of its software:
o SICAM GridEdge Essential ARM: No fix is currently planned.
o SICAM GridEdge Essential Intel: Update to v2.7.3 or later
o SICAM GridEdge Essential with GDS ARM: Currently no fix is planned.
o SICAM GridEdge Essential with GDS Intel: Update to v2.7.3 or later
Siemens has identified the following specific workarounds and mitigations users
can apply to reduce the risk:
o If possible, restrict physical access to the device and limit access to the
SSH port (22/TCP) to trusted IP addresses
As a general security measure, Siemens recommends protecting network access to
devices with appropriate mechanisms. To operate the devices in a protected IT
environment, Siemens recommends configuring the environment according to
Siemens' operational guidelines for industrial security and following
recommendations in the product manuals.
Additional information on industrial security by Siemens can be found on the
Siemens industrial security webpage .
For more information, see Siemens Security Advisory SSA-225578
CISA recommends users take defensive measures to minimize the risk of
exploitation of this vulnerability these vulnerabilities. Specifically, users
should:
o Minimize network exposure for all control system devices and/or systems,
and ensure they are not accessible from the Internet .
o Locate control system networks and remote devices behind firewalls and
isolate them from business networks.
o 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.
For any questions related to this report, please contact the CISA at:
Email: CISAservicedesk@cisa.dhs.gov
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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