Vulnerability identifier: #VU21969

Vulnerability risk: Low

CVSSv3.1: 3.4 [CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N/E:U/RL:U/RC:C]

CVE-ID: CVE-2019-10929

CWE-ID: CWE-300

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
SIMATIC S7-PLCSIM Advanced
Server applications / SCADA systems
SIMATIC S7-1500 Software Controller
Server applications / SCADA systems
SIMATIC ET 200SP Open Controller
Server applications / SCADA systems
SIMATIC S7-1500 CPU
Hardware solutions / Firmware
SIMATIC S7-1200
Hardware solutions / Firmware

Vendor: Siemens

Description

The vulnerability allows a remote attacker to perform man-in-the-middle (MitM) attack.

The vulnerability exists due to certain properties in the calculation used for integrity protection. A remote attacker in a Man-in-the-Middle position can modify network traffic exchanged on 102/tcp port.

This vulnerability affects the following products:

• SIMATIC ET 200SP Open Controller CPU 1515SP PC (All versions)

• SIMATIC ET 200SP Open Controller CPU 1515SP PC2 (All versions)

• SIMATIC S7-1200 CPU family (All versions >= V4.0)

• SIMATIC S7-1500 CPU family (All versions)

• SIMATIC S7-1500 Software Controller (All versions)

• SIMATIC S7-PLCSIM Advanced (All versions)

Mitigation
Cybersecurity Help is currently unaware of any official solution to address this vulnerability.

Vulnerable software versions

SIMATIC S7-PLCSIM Advanced: All versions

SIMATIC S7-1500 Software Controller: All versions

SIMATIC S7-1500 CPU: All versions

SIMATIC S7-1200: 2.00 - 4.0

SIMATIC ET 200SP Open Controller: All versions

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External links
http://cert-portal.siemens.com/productcert/pdf/ssa-232418.pdf

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Q & A

Can this vulnerability be exploited remotely?

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

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.