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

Vulnerability identifier: #VU28936

CSH Severity: Low

CVSS v4.0: 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/E:U/U:Clear

CVE-ID: CVE-2020-7580

CWE-ID: CWE-428

Exploitation vector: Local access

Exploit availability: No public exploit available

Vendor: Siemens

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

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.

Install updates from vendor's website.

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