CVE-2020-15786

09.09.2020, 19:15

A vulnerability has been identified in SIMATIC HMI Basic Panels 2nd Generation (incl. SIPLUS variants) (All versions < V16), SIMATIC HMI Comfort Panels (incl. SIPLUS variants) (All versions <= V16), SIMATIC HMI Mobile Panels (All versions <= V16), SIMATIC HMI Unified Comfort Panels (All versions <= V16). Affected devices insufficiently block excessive authentication attempts. This could allow a remote attacker to discover user passwords and obtain access to the Sm@rt Server via a brute-force attack.

Provider	Type	Base Score	Atk. Vector	Atk. Complexity	Priv. Required	Vector
NIST	NIST	9.8 CRITICAL	NETWORK	LOW	NONE	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
siemens	CNA	---				---
CVE	ADP	---				---

Base Score

CVSS 3.x

EPSS Score

Percentile: 61%

Vendor	Product	Version
siemens	simatic_hmi_basic_panels_2nd_generation_firmware	𝑥 ≤ 14
siemens	simatic_hmi_comfort_panels_firmware	*
siemens	simatic_hmi_mobile_panels_firmware	*
siemens	simatic_hmi_united_comfort_panels_firmware	*

𝑥

= Vulnerable software versions

Common Weakness Enumeration

CWE-307 - Improper Restriction of Excessive Authentication Attempts
The product does not implement sufficient measures to prevent multiple failed authentication attempts within a short time frame, making it more susceptible to brute force attacks.

References

https://cert-portal.siemens.com/productcert/pdf/ssa-542525.pdf