CVE-2021-42029

EUVD-2021-29017

12.04.2022, 09:15

A vulnerability has been identified in SIMATIC STEP 7 (TIA Portal) V15 (All versions), SIMATIC STEP 7 (TIA Portal) V16 (All versions < V16 Update 5), SIMATIC STEP 7 (TIA Portal) V17 (All versions < V17 Update 2). An attacker could achieve privilege escalation on the web server of certain devices due to improper access control vulnerability in the engineering system software. The attacker needs to have direct access to the impacted web server.

Provider	Type	Base Score	Atk. Vector	Atk. Complexity	Priv. Required	Vector
NIST	Primary	7.8 HIGH	LOCAL	LOW	LOW	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Base Score

CVSS 3.x

EPSS Score

Percentile: 11%

Affected Products (NVD)

Vendor	Product	Version
siemens	simatic_step_7	15 ≤ 𝑥 < 16

𝑥

= Vulnerable software versions

Common Weakness Enumeration

CWE-284 - Improper Access Control
The software does not restrict or incorrectly restricts access to a resource from an unauthorized actor.

References

https://cert-portal.siemens.com/productcert/pdf/ssa-350757.pdf