Denial of service in Siemens Industrial Real-Time (IRT) Devices



Published: 2019-10-10 | Updated: 2019-10-18
Risk Medium
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2019-10923
CWE-ID CWE-20
Exploitation vector Network
Public exploit Public exploit code for vulnerability #1 is available.
Vulnerable software
Subscribe 		SINUMERIK 840D sl
Server applications / SCADA systems

SINUMERIK 828D
Server applications / SCADA systems

SIMATIC S7-400 PN/DP V7
Server applications / SCADA systems

CP1616
Server applications / SCADA systems

CP1604
Server applications / SCADA systems

SINAMICS SM120
Hardware solutions / Firmware

SINAMICS SL150
Hardware solutions / Firmware

SINAMICS S150
Hardware solutions / Firmware

SINAMICS S120
Hardware solutions / Firmware

SINAMICS S110
Hardware solutions / Firmware

SINAMICS GM150
Hardware solutions / Firmware

SINAMICS GL150
Hardware solutions / Firmware

SINAMICS GH150
Hardware solutions / Firmware

SINAMICS G150
Hardware solutions / Firmware

SINAMICS G130
Hardware solutions / Firmware

SINAMICS G120
Hardware solutions / Firmware

SINAMICS G110M
Hardware solutions / Firmware

SINAMICS DCP
Hardware solutions / Firmware

SINAMICS DCM
Hardware solutions / Firmware

SIMOTION Firmware
Hardware solutions / Firmware

SIMATIC WinAC RTX (F) 2010
Hardware solutions / Firmware

SIMATIC S7-400
Hardware solutions / Firmware

SIMATIC S7-300
Hardware solutions / Firmware

SIMATIC PN/PN Coupler
Hardware solutions / Firmware

SIMATIC ET 200pro
Hardware solutions / Firmware

SIMATIC ET 200ecoPN
Hardware solutions / Firmware

SIMATIC ET 200S
Hardware solutions / Firmware

SIMATIC ET 200M
Hardware solutions / Firmware

SCALANCE X-200 IRT
Hardware solutions / Routers & switches, VoIP, GSM, etc

Vendor Siemens

Security Bulletin

This security bulletin contains one medium risk vulnerability.

1) Input validation error

EUVDB-ID: #VU21932

Risk: Medium

CVSSv3.1: 6.7 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:P/RL:O/RC:C]

CVE-ID: CVE-2019-10923

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to insufficient validation of user-supplied input. A remote attacker can send a specially crafted packet, break the real-time synchronization of the affected installation and cause a denial-of-service condition on the target system.


Mitigation

Install updates from vendor's website for the following vulnerable products:
  • CP1604/CP1616: All versions prior to 2.8
  • Development/Evaluation Kits for PROFINET IO:
    • DK Standard Ethernet Controller: All versions prior to 4.1.1 Patch 05
    • EK-ERTEC 200: All versions prior to 4.5.0 Patch 01
    • EK-ERTEC 200P: All versions prior to 4.5.0
  • SCALANCE X-200IRT: All versions prior to 5.2.1
  • SIMATIC ET 200M: All versions
  • SIMATIC ET 200S: All versions
  • SIMATIC ET 200ecoPN (except 6ES7148-6JD00-0AB0 and 6ES7146-6FF00-0AB0): All versions
  • SIMATIC ET 200pro: All versions
  • SIMATIC PN/PN Coupler 6ES7158-3AD01-0XA0: All versions
  • SIMATIC S7-300 CPU family (incl. F): All versions
  • SIMATIC S7-400 (incl. F) v6 and below: All versions
  • SIMATIC S7-400 PN/DP v7 (incl. F): All versions
  • SIMATIC WinAC RTX (F) 2010: All versions prior to SP3
  • SIMOTION: All versions
  • SINAMICS DCM: All versions prior to 1.5 HF1
  • SINAMICS DCP: All versions
  • SINAMICS G110M v4.7 (Control Unit): All versions prior to 4.7 SP10 HF5
  • SINAMICS G120 v4.7 (Control Unit): All versions prior to 4.7 SP10 HF5
  • SINAMICS G130 v4.7 (Control Unit): All versions prior to 4.7 HF29
  • SINAMICS G150 (Control Unit): All versions prior to 4.8
  • SINAMICS GH150 v4.7 (Control Unit): All versions
  • SINAMICS GL150 v4.7 (Control Unit): All versions
  • SINAMICS GM150 v4.7 (Control Unit): All versions
  • SINAMICS S110 (Control Unit): All versions
  • SINAMICS S120 v4.7 (Control Unit and CBE20): All versions prior to 4.7 HF34
  • SINAMICS S150 (Control Unit): All versions prior to 4.8
  • SINAMICS SL150 v4.7 (Control Unit): All versions
  • SINAMICS SM120 v4.7 (Control Unit): All versions
  • SINUMERIK 828D: All versions prior to 4.8 SP5
  • SINUMERIK 840D sl: All versions

Vulnerable software versions

SINUMERIK 840D sl: All versions

SINUMERIK 828D: before 4.8 SP5

SINAMICS SM120: All versions

SINAMICS SL150: All versions

SINAMICS S150: before 4.8

SINAMICS S120: before 4.7 HF34

SINAMICS S110: All versions

SINAMICS GM150: All versions

SINAMICS GL150: All versions

SINAMICS GH150: All versions

SINAMICS G150: before 4.8

SINAMICS G130: before 4.7 HF29

SINAMICS G120: before 4.7 SP10 HF5

SINAMICS G110M: before 4.7 SP10 HF5

SINAMICS DCP: All versions

SINAMICS DCM: before 1.5 HF1

SIMOTION Firmware: All versions

SIMATIC WinAC RTX (F) 2010: All versions

SIMATIC S7-400 PN/DP V7: All versions

SIMATIC S7-400: All versions

SIMATIC S7-300: All versions

SIMATIC PN/PN Coupler: All versions

SIMATIC ET 200pro: All versions

SIMATIC ET 200ecoPN: All versions

SIMATIC ET 200S: All versions

SIMATIC ET 200M: All versions

SCALANCE X-200 IRT: before 5.2.1

CP1616: 1.0 - 2.7.2

CP1604: 1.0 - 2.7.2

External links

http://cert-portal.siemens.com/productcert/pdf/ssa-349422.pdf
http://www.us-cert.gov/ics/advisories/icsa-19-283-01


Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

How the attacker can exploit this vulnerability?

The attacker would have to send a specially crafted request to the affected application in order to exploit this vulnerability.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability. However, proof of concept for this vulnerability is available.



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