Vulnerability identifier: #VU7515

Vulnerability risk: Low

CVSSv3.1: 6.4 [CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2017-6870

CWE-ID: CWE-300

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
SIMATIC WinCC Sm@rtClient for Android
Server applications / SCADA systems

Vendor: Siemens

Description
The vulnerability allows a remote attacker to perform a man-in-the-middle attack.

The weakness exists due to an error when TLS protocol implementation. A remote attacker can conduct MITM attack to read and modify data within a TLS session.

Mitigation
Update SIMATIC WinCC Sm@rtClient for Android to version 1.0.2.2.

Vulnerable software versions

SIMATIC WinCC Sm@rtClient for Android: 01.00.01.00

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External links
http://ics-cert.us-cert.gov/advisories/ICSA-17-194-03

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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.