December 10, 2019
Multiple Siemens SIMATIC Products are is prone to a security-bypass vulnerability. Attackers can exploit this issue to bypass certain security restrictions to perform unauthorized actions. This may aid in further attacks. The following Siemens products are affected: Siemens SIMATIC CP 1626 Siemens SIMATIC HMI Panel Siemens SIMATIC NET PC Software Siemens SIMATIC STEP 7 (TIA Portal) prior to v16 Siemens SIMATIC WinCC (TIA Portal) prior to v16 Siemens SIMATIC WinCC OA: prior to v3.16 Patch 12 Siemens SIMATIC WinCC Runtime Advanced Siemens SIMATIC WinCC Runtime Professional Siemens TIM 1531 IRC
- Siemens SIMATIC CP 1626
- Siemens SIMATIC HMI Panels
- Siemens SIMATIC NET PC Software
- Siemens SIMATIC STEP 7 (TIA Portal) V11
- Siemens SIMATIC STEP 7 (TIA Portal) v10
- Siemens SIMATIC STEP 7 (TIA Portal) v15
- Siemens SIMATIC WinCC (TIA Portal) V11
- Siemens SIMATIC WinCC (TIA Portal) V12
- Siemens SIMATIC WinCC (TIA Portal) V13
- Siemens SIMATIC WinCC (TIA Portal) V14
- Siemens SIMATIC WinCC (TIA Portal) v10
- Siemens SIMATIC WinCC (TIA Portal) v15
- Siemens SIMATIC WinCC OA 3.12
- Siemens SIMATIC WinCC OA 3.14
- Siemens SIMATIC WinCC OA 3.15
- Siemens SIMATIC WinCC OA 3.16
- Siemens SIMATIC WinCC Runtime Professional
- Siemens SIMATIC Wincc Runtime Advanced
- Siemens TIM 1531 IRC
Block external access at the network boundary, unless external parties require service.
If global access isn't needed, filter access to the affected computer at the network boundary. Restricting access to only trusted computers and networks might greatly reduce the likelihood of successful exploits.
Implement multiple redundant layers of security.
Use of multiple redundant layers of encryption may reduce exposure to this and other latent vulnerabilities.
Updates are available. Please see the references or vendor advisory for more information.
Eli Biham, Sara Bitan, Aviad Carmel, and Alon Dankner from Faculty of Computer Science, Technion Haifa, Uriel Malin and Avishai Wool from the School of Electrical Engineering, Tel-Aviv University
© 1995- Symantec Corporation
Permission to redistribute this alert electronically is granted as long as it is not edited in any way unless authorized by Symantec Security Response. Reprinting the whole or part of this alert in any medium other than electronically requires permission from firstname.lastname@example.org.
The information in the advisory is believed to be accurate at the time of publishing based on currently available information. Use of the information constitutes acceptance for use in an AS IS condition. There are no warranties with regard to this information. Neither the author nor the publisher accepts any liability for any direct, indirect, or consequential loss or damage arising from use of, or reliance on, this information.
Symantec, Symantec products, Symantec Security Response, and email@example.com are registered trademarks of Symantec Corp. and/or affiliated companies in the United States and other countries. All other registered and unregistered trademarks represented in this document are the sole property of their respective companies/owners.