CVE-2023-35920

11.07.2023, 10:15

A vulnerability has been identified in SIMATIC MV540 H (All versions < V3.3.4), SIMATIC MV540 S (All versions < V3.3.4), SIMATIC MV550 H (All versions < V3.3.4), SIMATIC MV550 S (All versions < V3.3.4), SIMATIC MV560 U (All versions < V3.3.4), SIMATIC MV560 X (All versions < V3.3.4). Affected devices cannot properly process specially crafted IP packets sent to the devices. This could allow an unauthenticated remote attacker to cause a denial of service condition. The affected devices must be restarted manually.

Provider	Type	Base Score	Atk. Vector	Atk. Complexity	Priv. Required	Vector
NIST	NIST	7.5 HIGH	NETWORK	LOW	NONE	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
siemens	CNA	7.5 HIGH				CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:P/RL:O/RC:C
CVE	ADP	---				---
CISA-ADP	ADP	---				---

Base Score

CVSS 3.x

EPSS Score

Percentile: 71%

Vendor	Product	Version
siemens	simatic_mv540_h_firmware	𝑥 < 3.3.4
siemens	simatic_mv540_s_firmware	𝑥 < 3.3.4
siemens	simatic_mv550_h_firmware	𝑥 < 3.3.4
siemens	simatic_mv550_s_firmware	𝑥 < 3.3.4
siemens	simatic_mv560_u_firmware	𝑥 < 3.3.4
siemens	simatic_mv560_x_firmware	𝑥 < 3.3.4

𝑥

= Vulnerable software versions

Common Weakness Enumeration

CWE-400 - Uncontrolled Resource Consumption
The software does not properly control the allocation and maintenance of a limited resource, thereby enabling an actor to influence the amount of resources consumed, eventually leading to the exhaustion of available resources.

References

https://cert-portal.siemens.com/productcert/pdf/ssa-561322.pdf