PT-2022-21705 · Siemens · Simatic Mv560 X+2

Published 2022-07-12 · Updated 2022-07-15 · CVE-2022-33138

Positive Technologies (AI Summary)

CVSS v3.1

7.5

High

Base vector

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

Name of the Vulnerable Software and Affected Versions SIMATIC MV540 H versions prior to V3.3 SIMATIC MV540 S versions prior to V3.3 SIMATIC MV550 H versions prior to V3.3 SIMATIC MV550 S versions prior to V3.3 SIMATIC MV560 U versions prior to V3.3 SIMATIC MV560 X versions prior to V3.3

Description A vulnerability has been identified where affected devices do not perform authentication for several web API endpoints. This could allow an unauthenticated remote attacker to read and download data from the device.

Recommendations For SIMATIC MV540 H versions prior to V3.3, update to version V3.3 or later. For SIMATIC MV540 S versions prior to V3.3, update to version V3.3 or later. For SIMATIC MV550 H versions prior to V3.3, update to version V3.3 or later. For SIMATIC MV550 S versions prior to V3.3, update to version V3.3 or later. For SIMATIC MV560 U versions prior to V3.3, update to version V3.3 or later. For SIMATIC MV560 X versions prior to V3.3, update to version V3.3 or later. As a temporary workaround, consider restricting access to the affected web API endpoints until a patch is available.

Fix

Missing Authentication

Weakness Enumeration

CWE-306

Related Identifiers

CVE-2022-33138

Affected Products

Simatic Mv540 S

Simatic Mv550 H

Simatic Mv560 X

References · 4

• https://cert-portal.siemens.com/productcert/pdf/ssa-348662.pdf · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2022-33138 · Security Note
• https://osv.dev/vulnerability/CVE-2022-33138 · Vendor Advisory
• https://t.me/cibsecurity/45977 · Telegram Post