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AUSCERT External Security Bulletin Redistribution
ESB-2022.5799
ICS Advisory (ICSA-22-314-06) Siemens QMS Automotive
11 November 2022
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AusCERT Security Bulletin Summary
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Product: Siemens QMS Automotive
Publisher: ICS-CERT
Operating System: Network Appliance
Resolution: Mitigation
CVE Names: CVE-2022-43958
Original Bulletin:
https://us-cert.cisa.gov/ics/advisories/icsa-22-314-06
Comment: CVSS (Max): 7.6 CVE-2022-43958 (CVSS:3.0/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:L)
CVSS Source: ICS-CERT
Calculator: https://www.first.org/cvss/calculator/3.0#CVSS:3.0/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:L
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ICS Advisory (ICSA-22-314-06)
Siemens QMS Automotive
Original release date: November 10, 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 7.6
o ATTENTION: Exploitable remotely/low attack complexity
o Vendor: Siemens
o Equipment: QMS Automotive
o Vulnerability: Cleartext Storage of Sensitive Information in Memory
2. RISK EVALUATION
Successful exploitation of this vulnerability could allow an attacker to read
credentials and impersonate authorized users.
3. TECHNICAL DETAILS
3.1 AFFECTED PRODUCTS
The following versions of Siemens QMS Automotive, a quality management system,
are affected:
All versions
3.2 VULNERABILITY OVERVIEW
3.2.1 CLEARTEXT STORAGE OF SENSITIVE INFORMATION IN MEMORY CWE-316
All versions of Siemens QMS Automotive contain a vulnerability that stores user
credentials in plaintext inside the user database. This could allow an attacker
to read credentials from memory.
CVE-2022-43958 has been assigned to this vulnerability. A CVSS v3 base score of
7.6 has been calculated; the CVSS vector string is ( AV:A/AC:L/PR:L/UI:N/S:U/
C:H/I:H/A:L ).
3.3 BACKGROUND
o CRITICAL INFRASTRUCTURE SECTORS: Critical Manufacturing
o COUNTRIES/AREAS DEPLOYED: Worldwide
o COMPANY HEADQUARTERS LOCATION: Germany
3.4 RESEARCHER
Siemens reported this vulnerability to CISA.
4. MITIGATIONS
Siemens has identified the following specific workarounds and mitigations users
can apply to reduce the risk:
o Enable encryption for user passwords.
As a general security measure, Siemens strongly recommends protecting network
access to devices with appropriate mechanisms. In order to operate the devices
in a protected IT environment, Siemens recommends configuring the environment
according to Siemens' operational guidelines for industrial security and to
follow the recommendations in the product manuals.
For more information, see Siemens Security Advisory SSA-587547 in HTML or CSAF
.
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
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