CVE-2021-33737

14.09.2021, 11:15

A vulnerability has been identified in SIMATIC CP 343-1 (incl. SIPLUS variants) (All versions), SIMATIC CP 343-1 Advanced (incl. SIPLUS variants) (All versions), SIMATIC CP 343-1 ERPC (All versions), SIMATIC CP 343-1 Lean (incl. SIPLUS variants) (All versions), SIMATIC CP 443-1 (All versions < V3.3), SIMATIC CP 443-1 (All versions < V3.3), SIMATIC CP 443-1 Advanced (All versions < V3.3), SIPLUS NET CP 443-1 (All versions < V3.3), SIPLUS NET CP 443-1 Advanced (All versions < V3.3). Sending a specially crafted packet to port 102/tcp of an affected device could cause a denial of service condition. A restart is needed to restore normal operations.

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:U/RC:C
CVE	ADP	---				---

Base Score

CVSS 3.x

EPSS Score

Percentile: 45%

Vendor	Product	Version
siemens	simatic_cp_343-1_firmware	*
siemens	simatic_cp_343-1_advanced_firmware	*
siemens	simatic_cp_343-1_erpc_firmware	*
siemens	simatic_cp_343-1_lean_firmware	*
siemens	simatic_cp_443-1_firmware	*
siemens	simatic_cp_443-1_advanced_firmware	*

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= Vulnerable software versions

Common Weakness Enumeration

CWE-119 - Improper Restriction of Operations within the Bounds of a Memory Buffer
The software performs operations on a memory buffer, but it can read from or write to a memory location that is outside of the intended boundary of the buffer.

References

https://cert-portal.siemens.com/productcert/pdf/ssa-549234.pdf