Information disclosure in Siemens SIMATIC and SIMOTICS



Published: 2020-08-12
Risk Low
Patch available NO
Number of vulnerabilities 1
CVE-ID CVE-2019-15126
CWE-ID CWE-326
Exploitation vector Local network
Public exploit Public exploit code for vulnerability #1 is available.
Vulnerable software
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SIMATIC RF650M
Hardware solutions / Firmware

SIMATIC RF350M
Hardware solutions / Other hardware appliances

SIMOTICS CONNECT 400
Hardware solutions / Other hardware appliances

Vendor Siemens

Security Bulletin

This security bulletin contains one low risk vulnerability.

1) Inadequate Encryption Strength

EUVDB-ID: #VU25646

Risk: Low

CVSSv3.1: 6.2 [CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N/E:P/RL:U/RC:C]

CVE-ID: CVE-2019-15126

CWE-ID: CWE-326 - Inadequate Encryption Strength

Exploit availability: Yes

Description

The vulnerability allows a remote attacker to decrypt Wi-Fi frames.

The vulnerability exists because after an affected device handles a disassociation event it can send a limited number of Wi-Fi frames encrypted with a static, weak Pairwise Temporal Key (PTK). A remote attacker on the local network can acquire these frames and decrypt them with the static PTK without the knowledge of the security session establishment used to secure the Wi-Fi network.

Mitigation

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

Vulnerable software versions

SIMATIC RF650M: All versions

SIMATIC RF350M: All versions

SIMOTICS CONNECT 400: All versions


CPE2.3 External links

http://ics-cert.us-cert.gov/advisories/icsa-20-224-05

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the local network (LAN).

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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