CVEvulnerability

CVE-2021-31894

8.8 HIGH Published 2021-07-13 Modified 2026-06-17 Official page ↗
Status
Modified
Published
2021-07-13
Last modified
2026-06-17
Assigner
[email protected]
CVSS 3.1 ([email protected])
8.8 HIGH — CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
CVSS 2.0 ([email protected])
7.2 HIGH — AV:L/AC:L/Au:N/C:C/I:C/A:C
Weaknesses
CWE-732

Description

A vulnerability has been identified in SIMATIC PCS 7 V8.2 and earlier (All versions), SIMATIC PCS 7 V9.X (All versions < V9.1 SP2), SIMATIC PDM (All versions < V9.2 SP2), 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.

Affected configurations

• siemens simatic pcs 7 firmware (<= 8.2) • siemens simatic pcs 7 firmware 9.0 • siemens simatic pdm firmware • siemens simatic step 7 firmware (>= 5.0 < 5.7) • siemens sinamics starter firmware (< 5.4) • siemens sinamics starter firmware 5.4

Related

Weakness · CWE (1)

  • CWE-732 Incorrect Permission Assignment for Critical Resource weakness

References