Siemens SIMATIC STEP 7 (TIA Portal) before 13 SP1 determines a user’s privileges on the basis of project-file fields that lack integrity protection, which allows remote attackers to establish arbitrary authorization data via a modified file.
Source: https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-1356
Reference (s):
- http://www.siemens.com/innovation/pool/de/forschungsfelder/siemens_security_advisory_ssa-234789.pdf