PT-2021-19568 · Siemens · Simatic Pdm+3

Published 2021-07-13 · Updated 2021-08-06 · CVE-2021-31893

Positive Technologies (AI Summary)

CVSS v3.1

7.8

High

Base vector

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

Name of the Vulnerable Software and Affected Versions: SIMATIC PCS 7 versions 8.2 and earlier SIMATIC PCS 7 V9.0 versions prior to V9.0 SP3 SIMATIC PDM versions prior to V9.2 SIMATIC STEP 7 V5.X versions prior to V5.6 SP2 HF3 SINAMICS STARTER (containing STEP 7 OEM version) versions prior to V5.4 HF2

Description: The affected software contains a buffer overflow vulnerability while handling certain files. This could allow a local attacker to trigger a denial-of-service condition or potentially lead to remote code execution.

Recommendations: For SIMATIC PCS 7 versions 8.2 and earlier, update to a version later than V8.2. For SIMATIC PCS 7 V9.0 versions prior to V9.0 SP3, update to V9.0 SP3 or later. For SIMATIC PDM versions prior to V9.2, update to V9.2 or later. For SIMATIC STEP 7 V5.X versions prior to V5.6 SP2 HF3, update to V5.6 SP2 HF3 or later. For SINAMICS STARTER (containing STEP 7 OEM version) versions prior to V5.4 HF2, update to V5.4 HF2 or later.

Fix

Buffer Overflow

Weakness Enumeration

CWE-120

Related Identifiers

CVE-2021-31893

Affected Products

Simatic Pcs 7

Simatic Pdm

Simatic Step 7

Sinamics Starter

References · 4

• https://osv.dev/vulnerability/CVE-2021-31893 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2021-31893 · Security Note
• https://cert-portal.siemens.com/productcert/pdf/ssa-641963.pdf · Vendor Advisory
• https://t.me/cibsecurity/26098 · Telegram Post