|2016-10-13||SOFTWARE||Siemens SIMATIC STEP 7 (TIA Portal)||Dmitry Sklyarov and Gleb Gritsai||N/A||CVE-2016-7959, CVE-2016-7960||N/A||N/A||N/A|
# Siemens SIMATIC STEP 7 (TIA Portal) Information Disclosure Vulnerabilities
Siemens has released a new version of SIMATIC STEP 7 (TIA Portal) to mitigate information disclosure vulnerabilities. These vulnerabilities were reported directly to Siemens by Dmitry Sklyarov and Gleb Gritsai from Positive Technologies. Siemens has produced a new version to mitigate these vulnerabilities.
### AFFECTED PRODUCTS
Siemens reports that the vulnerabilities affect the following versions of SIMATIC STEP 7 (TIA Portal):
SIMATIC STEP 7 (TIA Portal): All versions prior to V14
A local attacker who exploits these vulnerabilities may be able to access sensitive information contained in TIA Portal project files under certain conditions.
Impact to individual organizations depends on many factors that are unique to each organization. NCCIC/ICS-CERT recommends that organizations evaluate the impact of these vulnerabilities based on their operational environment, architecture, and product implementation.
Siemens is a multinational company headquartered in Munich, Germany.
The affected product, SIMATIC Step 7 (TIA Portal), is engineering software for SIMATIC products. According to Siemens, SIMATIC Step 7 (TIA Portal) is deployed across several sectors including Chemical, Energy, Food and Agriculture, and Water and Wastewater Systems. Siemens estimates that this product is used worldwide.
### VULNERABILITY CHARACTERIZATION
# VULNERABILITY OVERVIEW
INADEQUATE ENCRYPTION STRENGTH
Local attackers with read access to TIA Portal project files could brute-force preshared keys used for machine-to-machine communication with possibly reduced effort.
CVE-2016-7959 has been assigned to this vulnerability. A CVSS v3 base score of 2.5 has been calculated; the CVSS vector string is (AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N).
Local attackers could circumvent the protection of the transport format of TIA Portal project files and potentially access sensitive configuration settings. This format is used by TIA Portal during the migration of project files to a new version (e.g., V12 to V13).
CVE-2016-7960 has been assigned to this vulnerability. A CVSS v3 base score of 2.5 has been calculated; the CVSS vector string is (AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N).
### VULNERABILITY DETAILS
These vulnerabilities are not exploitable remotely.
# EXISTENCE OF EXPLOIT
No known public exploits specifically target these vulnerabilities.
Crafting a working exploit for these vulnerabilities would be difficult.
Access to the TIA Portal project files on engineering workstations or network storage must be protected with appropriate mechanisms from unauthorized access.
Siemens provides SIMATIC STEP 7 (TIA Portal) V14, which fixes the vulnerabilities and recommends users migrate projects to the new version. It can be found at the following location on the Siemens web site:
Siemens strongly recommends users protect network access to engineering workstations and project storage with appropriate mechanisms. Siemens also advises that users configure the operational environment according to Siemens' Operational Guidelines for Industrial Security:
For more information on these vulnerabilities and more detailed mitigation instructions, please see Siemens Security Advisory SSA-869766 at the following location: