Unquoted Search Path or Element in Siemens products - CVE-2020-7580

Vulnerability identifier: #VU28936

CSH Severity: Low

CVSS v4: 8.4 [CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]

CVE-ID: CVE-2020-7580

CWE-ID: CWE-428

Exploitation vector: Local access

Exploit availability: No public exploit available

The vulnerability allows a local user to execute arbitrary code on the target system. 

The vulnerability exist due to a component within the affected application that regularly calls a helper binary with SYSTEM privileges while the call path is not quoted. A local administrator can execute arbitrary code with SYSTEM level privileges.

SINUMERIK Operate
Siemens SIMATIC WinCC
SINUMERIK ONE virtual
SIMATIC WinCC OA
SIMATIC STEP 7
SIMATIC S7-1500 Software Controller
SIMATIC PCS 7
SIMATIC NET PC Software
SIMATIC STEP 7 (TIA Portal)
SIMATIC WinCC Runtime Professional
SINEMA Server
SIMATIC Automation Tool
SINEC NMS
SINAMICS Startdrive
SIMATIC ProSave
SIMATIC PCS neo

Install updates from vendor's website.

Siemens SIMATIC WinCC - addressed in versions 7.4 SP1 Update 14, 7.5 SP1 Update 3
SIMATIC WinCC OA - addressed in versions 3.16-P018, 3.17-P003
SIMATIC STEP 7 - update to 5.6 SP2 HF3
SIMATIC NET PC Software - update to 16 Upd3

• https://ics-cert.us-cert.gov/advisories/icsa-20-161-04
• https://cert-portal.siemens.com/productcert/pdf/ssa-312271.pdf

• Multiple vulnerabilities in Siemens SIMATIC, SINAMICS, SINEC, SINEMA and SINUMERIK