CVE-2021-31340

08.06.2021, 20:15

A vulnerability has been identified in SIMATIC RF166C (All versions > V1.1 and < V1.3.2), SIMATIC RF185C (All versions > V1.1 and < V1.3.2), SIMATIC RF186C (All versions > V1.1 and < V1.3.2), SIMATIC RF186CI (All versions > V1.1 and < V1.3.2), SIMATIC RF188C (All versions > V1.1 and < V1.3.2), SIMATIC RF188CI (All versions > V1.1 and < V1.3.2), SIMATIC RF360R (All versions < V2.0), SIMATIC Reader RF610R CMIIT (All versions > V3.0 < V4.0), SIMATIC Reader RF610R ETSI (All versions > V3.0 < V4.0), SIMATIC Reader RF610R FCC (All versions > V3.0 < V4.0), SIMATIC Reader RF615R CMIIT (All versions > V3.0 < V4.0), SIMATIC Reader RF615R ETSI (All versions > V3.0 < V4.0), SIMATIC Reader RF615R FCC (All versions > V3.0 < V4.0), SIMATIC Reader RF650R ARIB (All versions > V3.0 < V4.0), SIMATIC Reader RF650R CMIIT (All versions > V3.0 < V4.0), SIMATIC Reader RF650R ETSI (All versions > V3.0 < V4.0), SIMATIC Reader RF650R FCC (All versions > V3.0 < V4.0), SIMATIC Reader RF680R ARIB (All versions > V3.0 < V4.0), SIMATIC Reader RF680R CMIIT (All versions > V3.0 < V4.0), SIMATIC Reader RF680R ETSI (All versions > V3.0 < V4.0), SIMATIC Reader RF680R FCC (All versions > V3.0 < V4.0), SIMATIC Reader RF685R ARIB (All versions > V3.0 < V4.0), SIMATIC Reader RF685R CMIIT (All versions > V3.0 < V4.0), SIMATIC Reader RF685R ETSI (All versions > V3.0 < V4.0), SIMATIC Reader RF685R FCC (All versions > V3.0 < V4.0). Affected devices do not properly handle large numbers of incoming connections. An attacker may leverage this to cause a Denial-of-Service situation.

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	---				---
CVE	ADP	---				---

Base Score

CVSS 3.x

EPSS Score

Percentile: 64%

Vendor	Product	Version
siemens	simatic_rf166c_firmware	1.1 < 𝑥 < 1.3.2
siemens	simatic_rf185c_firmware	1.1 < 𝑥 < 1.3.2
siemens	simatic_rf186c_firmware	1.1 < 𝑥 < 1.3.2
siemens	simatic_rf186ci_firmware	1.1 < 𝑥 < 1.3.2
siemens	simatic_rf188c_firmware	1.1 < 𝑥 < 1.3.2
siemens	simatic_rf188ci_firmware	1.1 < 𝑥 < 1.3.2
siemens	simatic_rf360r_firmware	𝑥 < 2.0
siemens	simatic_reader_rf610r_cmiit_firmware	3.0 ≤ 𝑥 < 4.0
siemens	simatic_reader_rf610r_etsi_firmware	3.0 ≤ 𝑥 < 4.0
siemens	simatic_reader_rf610r_fcc_firmware	3.0 ≤ 𝑥 < 4.0
siemens	simatic_reader_rf615r_cmiit_firmware	3.0 ≤ 𝑥 < 4.0
siemens	simatic_reader_rf615r_etsi_firmware	3.0 ≤ 𝑥 < 4.0
siemens	simatic_reader_rf615r_fcc_firmware	3.0 ≤ 𝑥 < 4.0
siemens	simatic_reader_rf650r_cmiit_firmware	3.0 ≤ 𝑥 < 4.0
siemens	simatic_reader_rf650r_etsi_firmware	3.0 ≤ 𝑥 < 4.0
siemens	simatic_reader_rf650r_fcc_firmware	3.0 ≤ 𝑥 < 4.0
siemens	simatic_reader_rf650r_arib_firmware	3.0 ≤ 𝑥 < 4.0
siemens	simatic_reader_rf680r_cmiit_firmware	3.0 ≤ 𝑥 < 4.0
siemens	simatic_reader_rf680r_etsi_firmware	3.0 ≤ 𝑥 < 4.0
siemens	simatic_reader_rf680r_fcc_firmware	3.0 ≤ 𝑥 < 4.0
siemens	simatic_reader_rf680r_arib_firmware	3.0 ≤ 𝑥 < 4.0
siemens	simatic_reader_rf685r_cmiit_firmware	3.0 ≤ 𝑥 < 4.0
siemens	simatic_reader_rf685r_etsi_firmware	3.0 ≤ 𝑥 < 4.0
siemens	simatic_reader_rf685r_fcc_firmware	3.0 ≤ 𝑥 < 4.0
siemens	simatic_reader_rf685r_arib_firmware	3.0 ≤ 𝑥 < 4.0

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-787292.pdf