CVE-2021-31340

High

Description

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.

SeverityHigh

CVSS7.5

Exploit probability—

ProductSiemens Simatic Rf166c Firmware

PublishedJun 8, 2021

First seenJun 8, 2021

Weakness typeCWE-400Uncontrolled resource consumption

How to fix

Update

siemens simatic_rf166c_firmware1.3.2 or later
siemens simatic_rf185c_firmware1.3.2 or later
siemens simatic_rf186c_firmware1.3.2 or later
siemens simatic_rf186ci_firmware1.3.2 or later
siemens simatic_rf188c_firmware1.3.2 or later
siemens simatic_rf188ci_firmware1.3.2 or later
siemens simatic_rf360r_firmware2.0 or later
siemens simatic_reader_rf610r_cmiit_firmware4.0 or later
siemens simatic_reader_rf610r_etsi_firmware4.0 or later
siemens simatic_reader_rf610r_fcc_firmware4.0 or later
siemens simatic_reader_rf615r_cmiit_firmware4.0 or later
siemens simatic_reader_rf615r_etsi_firmware4.0 or later

Affected products

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

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