CVE-2021-31894 Information

Description

A vulnerability has been identified in SIMATIC PCS 7 V8.2 and earlier (All versions) SIMATIC PCS 7 V9.X (All versions) SIMATIC PDM (All versions) SIMATIC STEP 7 V5.X (All versions < V5.7) SINAMICS STARTER (containing STEP 7 OEM version) (All versions < V5.4 SP2 HF1). A directory containing metafiles relevant to devices’ configurations has write permissions. An attacker could leverage this vulnerability by changing the content of certain metafiles and subsequently manipulate parameters or behavior of devices that would be later configured by the affected software.

CVSS Vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

Reference

https://cert-portal.siemens.com/productcert/pdf/ssa-661034.pdf

Attack Complexity

LOW

Privileges Required

LOW

User Interaction Required

LOW

Scope

NONE

Confidentiality Impact

CHANGED

Integrity Impact

HIGH

Availability Impact

HIGH

Base Score

HIGH

Base Severity

8.8