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AUSCERT External Security Bulletin Redistribution
ESB-2020.3078
Advisory (icsa-20-252-01) Siemens SIMATIC RTLS Locating Manager
9 September 2020
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AusCERT Security Bulletin Summary
---------------------------------
Product: Siemens SIMATIC RTLS Locating Manager
Publisher: US-CERT
Operating System: Network Appliance
Impact/Access: Execute Arbitrary Code/Commands -- Existing Account
Increased Privileges -- Existing Account
Resolution: Patch/Upgrade
CVE Names: CVE-2020-10051 CVE-2020-10050 CVE-2020-10049
Original Bulletin:
https://us-cert.cisa.gov/ics/advisories/icsa-20-252-01
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ICS Advisory (ICSA-20-252-01)
Siemens SIMATIC RTLS Locating Manager
Original release date: September 08, 2020
Legal Notice
All information products included in https://us-cert.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://www.us-cert.gov/tlp/ .
1. EXECUTIVE SUMMARY
o CVSS v3 8.4
o ATTENTION: Low skill level to exploit
o Vendor: Siemens
o Equipment: SIMATIC RTLS Locating Manager
o Vulnerabilities: Incorrect Default Permissions, Unquoted Search Path or
Element
2. RISK EVALUATION
Successful exploitation of this vulnerability could allow a privileged local
user to escalate privileges.
3. TECHNICAL DETAILS
3.1 AFFECTED PRODUCTS
Siemens reports that the vulnerabilities affect the following versions of
SIMATIC RTLS Locating Manager:
o SIMATIC RTLS Locating Manager, all versions prior to v2.10.2
3.2 VULNERABILITY OVERVIEW
3.2.1 INCORRECT DEFAULT PERMISSIONS CWE-276
The start-stop scripts for the services of the affected application could allow
a local attacker to include arbitrary commands that are executed when services
are started or stopped interactively by system administrators.
CVE-2020-10049 has been assigned to this vulnerability. A CVSS v3 base score of
7.9 has been calculated; the CVSS vector string is ( AV:L/AC:L/PR:L/UI:R/S:C/
C:H/I:H/A:N ).
3.2.2 INCORRECT DEFAULT PERMISSIONS CWE-276
The directory of service executables of the affected application could allow a
local attacker to include arbitrary commands that are executed with SYSTEM
privileges when the system restarts.
CVE-2020-10050 has been assigned to this vulnerability. A CVSS v3 base score of
8.4 has been calculated; the CVSS vector string is ( AV:L/AC:L/PR:L/UI:N/S:C/
C:H/I:H/A:N ).
3.2.3 UNQUOTED SEARCH PATH OR ELEMENT CWE-428
Multiple services of the affected application are executed with SYSTEM
privileges while the call path is not quoted. This could allow a local attacker
to inject arbitrary commands that are executed instead of the legitimate
service.
CVE-2020-10051 has been assigned to this vulnerability. A CVSS v3 base score of
8.4 has been calculated; the CVSS vector string is ( AV:L/AC:L/PR:L/UI:N/S:C/
C:H/I:H/A:N ).
3.3 BACKGROUND
o CRITICAL INFRASTRUCTURE SECTORS: Critical Manufacturing, Transportation
Systems
o COUNTRIES/AREAS DEPLOYED: Worldwide
o COMPANY HEADQUARTERS LOCATION: Germany
3.4 RESEARCHER
Siemens reported these vulnerabilities to CISA.
4. MITIGATIONS
Siemens recommends that users apply the update of the SIMATIC RTLS Locating
Manager: v2.10.2
Siemens has identified the following specific workarounds and mitigations users
can apply to reduce the risk:
o Apply security hardening of the Windows Server, where the RTLS Locating
Manager is installed on, in accordance with your corporate security
policies or up-to-date hardening guidelines.
o Ensure that only trusted persons have access to the system and avoid the
configuration of additional local accounts on the server.
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
following the recommendations in the product manuals.
Follow this link for additional information on Industrial Security by Siemens .
For more information on these vulnerabilities and the associated mitigations,
please see Siemens security advisory SSA-251935
CISA recommends users take defensive measures to minimize the risk of
exploitation of this vulnerability.
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 these vulnerabilities. These
vulnerabilities are not exploitable remotely.
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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