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AUSCERT External Security Bulletin Redistribution
Advisory (icsa-19-192-03) Siemens TIA Administrator (TIA Portal)
12 July 2019
AusCERT Security Bulletin Summary
Product: Siemens TIA Administrator
Operating System: Windows
Impact/Access: Unauthorised Access -- Existing Account
CVE Names: CVE-2019-10915
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ICS Advisory (ICSA-19-192-03)
Siemens TIA Administrator (TIA Portal)
Original release date: July 11, 2019
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1. EXECUTIVE SUMMARY
o CVSS v3 8.0
o ATTENTION : Low skill level to exploit
o Vendor : Siemens
o Equipment : TIA Administrator (TIA Portal)
o Vulnerability : Improper Access Control
2. RISK EVALUATION
Successful exploitation of this vulnerability could allow an execution of some
commands without proper authentication.
3. TECHNICAL DETAILS
3.1 AFFECTED PRODUCTS
The following versions of TIA Administrator are affected:
o TIA Administrator: All versions prior to v1.0 SP1 Upd1
3.2 VULNERABILITY OVERVIEW
3.2.1 IMPROPER ACCESS CONTROL CWE-284
The integrated configuration web application (TIA Administrator) may allow an
attacker to execute certain application commands without proper authentication.
CVE-2019-10915 has been assigned to this vulnerability. A CVSS v3 base score of
8.0 has been calculated; the CVSS vector string is ( AV:L/AC:L/PR:N/UI:N/S:U/
o CRITICAL INFRASTRUCTURE SECTORS : Chemical, Critical Manufacturing, Energy,
Food and Agriculture, Water and Wastewater Systems
o COUNTRIES/AREAS DEPLOYED : Worldwide
o COMPANY HEADQUARTERS LOCATION : Germany
Joseph Bingham of Tenable reported this vulnerability to Siemens.
Siemens recommends users update to v1.0 SP1 Upd1 or later .
Siemens also recommends users restrict access to Port 8888/TCP to localhost
For more information on this vulnerability and associated software updates,
please see Siemens' security advisory SSA-721298 at: https://www.siemens.com/
NCCIC recommends users take defensive measures to minimize the risk of
exploitation of this vulnerability. Specifically, users should:
o Minimize network exposure for all control system devices and/or systems,
and ensure that they are not accessible from the Internet .
o Locate control system networks and remote devices behind firewalls, and
isolate them from the business network.
o When remote access is required, use secure methods, such as Virtual Private
Networks (VPNs), recognizing that VPNs may have vulnerabilities and should
be updated to the most current version available. Also recognize that VPN
is only as secure as the connected devices.
NCCIC reminds organizations to perform proper impact analysis and risk
assessment prior to deploying defensive measures.
NCCIC 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
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 NCCIC for tracking
and correlation against other incidents.
No known public exploits specifically target this vulnerability. This
vulnerability is not exploitable remotely.
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