PT-2023-4034 · Siemens · Simatic Mv550 H+2

Published 2023-06-20 · Updated 2023-07-19 · CVE-2023-35921

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 The issue is related to an uncontrolled resource consumption when processing Ethernet frames, which could allow a remote attacker to cause a denial of service condition by sending specially crafted Ethernet frames to the devices. Affected devices cannot properly process these frames and 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:2023-04332

CVE-2023-35921

Affected Products

Simatic Mv540 S

Simatic Mv550 H

Simatic Mv560 X

References · 7

• https://nvd.nist.gov/vuln/detail/CVE-2023-35921 · Security Note
• https://bdu.fstec.ru/vul/2023-04332 · Security Note
• https://osv.dev/vulnerability/CVE-2023-35921 · Vendor Advisory
• https://cert-portal.siemens.com/productcert/pdf/ssa-561322.pdf · Vendor Advisory
• https://safe-surf.ru/specialists/bulletins-nkcki/696299/?sphrase_id=45621 · Security Note
• https://t.me/cibsecurity/66360 · Telegram Post
• https://vuldb.com/ru/?id.233540 · Note