PT-2015-10: Privilege Gaining 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: Privilege Gaining
Access Vector: Local

CVSS v2:
Base Score: 2.6
Vector: (AV:L/AC:H/Au:N/C:P/I:P/A:N)

CVE: CVE-2015-1356

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 a Privilege Gaining vulnerability in Siemens SIMATIC STEP 7 (TIA Portal).

Vulnerability exists in TIA Portal due to improper integrity protection of project-file fields containing user’s privileges, which allows attackers to modify user permissions by manipulating project files.

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-2015-10&gt;
<http://www.siemens.com/innovation/pool/de/forschungsfelder/siemens_security_advisory_ssa-234789.pdf&gt;[](&lt;https://ics-cert.us-cert.gov/advisories/ICSA-14-238-02&gt;)

Reports on the vulnerabilities previously discovered by Positive Research:

<http://www.ptsecurity.com/research/advisory/&gt;
<http://en.securitylab.ru/lab/&gt;