Man-in-the-middle attack in SIMATIC WinCC Sm@rtClient for Android - CVE-2017-6870

Vulnerability identifier: #VU7515

CSH Severity: Low

CVSS v4: 9.1 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N]

CVE-ID: CVE-2017-6870

CWE-ID: CWE-300

Exploitation vector: Remote access

Exploit availability: No public exploit available

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.

SIMATIC WinCC Sm@rtClient for Android

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

• https://ics-cert.us-cert.gov/advisories/ICSA-17-194-03

• Two vulnerabilities in Siemens SIMATIC Sm@rtClient Android App