PT-2023-4033 · Siemens · Simatic Mv550 H+2

Published 2023-06-20 · Updated 2023-07-19 · CVE-2023-35920

Positive Technologies (AI Summary)

CVSS v2.0

7.8

High

Base vector

AV:N/AC:L/Au:N/C:N/I:N/A:C

Name of the Vulnerable Software and Affected Versions SIMATIC MV540 H versions prior to V3.3.4 SIMATIC MV540 S versions prior to V3.3.4 SIMATIC MV550 H versions prior to V3.3.4 SIMATIC MV550 S versions prior to V3.3.4 SIMATIC MV560 U versions prior to V3.3.4 SIMATIC MV560 X versions prior to V3.3.4

Description A vulnerability has been identified in the SIMATIC MV540, MV550, and MV560 devices, related to uncontrolled resource consumption when processing IP packets. This could allow an unauthenticated remote attacker to cause a denial of service condition by sending specially crafted IP packets to the devices. The affected devices must be restarted manually.

Recommendations For SIMATIC MV540 H versions prior to V3.3.4, update to version V3.3.4 or later. For SIMATIC MV540 S versions prior to V3.3.4, update to version V3.3.4 or later. For SIMATIC MV550 H versions prior to V3.3.4, update to version V3.3.4 or later. For SIMATIC MV550 S versions prior to V3.3.4, update to version V3.3.4 or later. For SIMATIC MV560 U versions prior to V3.3.4, update to version V3.3.4 or later. For SIMATIC MV560 X versions prior to V3.3.4, update to version V3.3.4 or later.

Fix

Resource Exhaustion

Weakness Enumeration

CWE-400

Related Identifiers

BDU:2023-04331

CVE-2023-35920

Affected Products

Simatic Mv540 S

Simatic Mv550 H

Simatic Mv560 X

References · 7

• https://osv.dev/vulnerability/CVE-2023-35920 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2023-35920 · Security Note
• https://bdu.fstec.ru/vul/2023-04331 · Security Note
• https://safe-surf.ru/specialists/bulletins-nkcki/696298/?sphrase_id=45532 · Security Note
• https://cert-portal.siemens.com/productcert/pdf/ssa-561322.pdf · Vendor Advisory
• https://vuldb.com/ru/?id.233539 · Note
• https://t.me/cibsecurity/66347 · Telegram Post