PT-2015-09: Information Disclosure in Siemens SIMATIC STEP 7 (TIA Portal)

Vulnerable software

Siemens SIMATIC STEP 7 (TIA Portal)
Version: 13 and earlier

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

Severity level

Severity level: Low
Impact: Information Disclosure
Access Vector: Local

CVSS v2:
Base Score: 2.1
Vector: (AV:L/AC:L/Au:N/C:P/I:N/A:N)

CVE: CVE-2015-1355

Software description

Siemens SIMATIC STEP 7 (TIA Portal) is an engineering software to configure and program SIMATIC controllers and Standard PCs running WinAC RTX.

Vulnerability description

The specialists of the Positive Research center have detected an Information Disclosure vulnerability in Siemens SIMATIC STEP 7 (TIA Portal).

Device user passwords in TIA portal project files are stored using a weak hashing algorithm. Attackers with read access to the project file could possibly reconstruct the passwords for device users.

How to fix

Update your sofware up to the latest version

Advisory status

21.09.2012 - Vendor gets vulnerability details
13.02.2015 - Vendor releases fixed version and details
25.02.2015 - Public disclosure

Credits

The vulnerability was detected by Alexander Timorin, Positive Research Center (Positive Technologies Company)

References

http://en.securitylab.ru/lab/PT-2015-09
http://www.siemens.com/innovation/pool/de/forschungsfelder/siemens_security_advisory_ssa-234789.pdf

Reports on the vulnerabilities previously discovered by Positive Research:

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