PT-2015-13: Unauthorized Access in Siemens SIMATIC HMI Devices

Vulnerable software

Siemens SIMATIC HMI Basic Panels 2nd Generation
Siemens SIMATIC HMI Comfort Panels
Siemens SIMATIC WinCC Runtime Advanced
Siemens SIMATIC WinCC Runtime Professional
Siemens SIMATIC HMI Basic Panels 1st Generation
Siemens SIMATIC HMI Mobile Panel 277
Siemens SIMATIC HMI Multi Panels
Siemens SIMATIC WinCC (TIA Portal)
Version: 13 SP1 Upd1 and earlier

Siemens SIMATIC WinCC
Версия: 7.3 Upd3 and earlier

Link:
http://www.siemens.com/

Severity level

Severity level: Medium
Impact: Unauthorized Access
Access Vector: Remote

CVSS v2:
Base Score: 6.8
Vector: (AV:N/AC:M/Au:N/C:P/I:P/A:P)

CVE: CVE-2015-2823

Software description

SIMATIC HMI Panels and SIMATIC WinCC Runtime Advanced are used for operator control and monitoring of machines and plants.

Vulnerability description

The specialists of the Positive Research center have detected a Unauthorized Access vulnerability in Siemens SIMATIC HMI Devices.

The vulnerability allows remote attackers to obtain password hashes for SIMATIC WinCC users and complete authentication.

How to fix

Update your sofware up to the latest version

Advisory status

22.04.2014 - Vendor gets vulnerability details
08.04.2015 - Vendor releases fixed version and details
23.07.2015 - Public disclosure

Credits

The vulnerability was detected by Ilya Karpov, Positive Research Center (Positive Technologies Company)

References

http://en.securitylab.ru/lab/PT-2015-13
http://www.siemens.com/innovation/pool/de/forschungsfelder/siemens_security_advisory_ssa-487246.pdf

Reports on the vulnerabilities previously discovered by Positive Research:

http://www.ptsecurity.com/research/advisory/
http://en.securitylab.ru/lab/