CVE-2021-31340 : A vulnerability has been identified in SIMATIC RF166C (All versions

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.

Published 2021-06-08 20:15:09

Updated 2022-10-06 17:28:45

Source Siemens AG

View at NVD, CVE.org

Vulnerability category: Denial of service

Products affected by CVE-2021-31340

Siemens » Simatic Rf188c Firmware
Versions after (>) 1.1 and before (<) 1.3.2
cpe:2.3:o:siemens:simatic_rf188c_firmware:*:*:*:*:*:*:*:*
Matching versions
When used together with: Siemens » Simatic Rf188c » Version: N/A
Siemens » Simatic Rf185c Firmware
Versions after (>) 1.1 and before (<) 1.3.2
cpe:2.3:o:siemens:simatic_rf185c_firmware:*:*:*:*:*:*:*:*
Matching versions
When used together with: Siemens » Simatic Rf185c » Version: N/A
Siemens » Simatic Rf186c Firmware
Versions after (>) 1.1 and before (<) 1.3.2
cpe:2.3:o:siemens:simatic_rf186c_firmware:*:*:*:*:*:*:*:*
Matching versions
When used together with: Siemens » Simatic Rf186c » Version: N/A
Siemens » Simatic Rf166c Firmware
Versions after (>) 1.1 and before (<) 1.3.2
cpe:2.3:o:siemens:simatic_rf166c_firmware:*:*:*:*:*:*:*:*
Matching versions
When used together with: Siemens » Simatic Rf166c » Version: N/A
Siemens » Simatic Rf186ci Firmware
Versions after (>) 1.1 and before (<) 1.3.2
cpe:2.3:o:siemens:simatic_rf186ci_firmware:*:*:*:*:*:*:*:*
Matching versions
When used together with: Siemens » Simatic Rf186ci » Version: N/A
Siemens » Simatic Rf188ci Firmware
Versions after (>) 1.1 and before (<) 1.3.2
cpe:2.3:o:siemens:simatic_rf188ci_firmware:*:*:*:*:*:*:*:*
Matching versions
When used together with: Siemens » Simatic Rf188ci » Version: N/A
Siemens » Simatic Rf360r Firmware
Versions before (<) 2.0
cpe:2.3:o:siemens:simatic_rf360r_firmware:*:*:*:*:*:*:*:*
Matching versions
When used together with: Siemens » Simatic Rf360r » Version: N/A
Siemens » Simatic Reader Rf610r Cmiit Firmware
Versions from including (>=) 3.0 and before (<) 4.0
cpe:2.3:o:siemens:simatic_reader_rf610r_cmiit_firmware:*:*:*:*:*:*:*:*
Matching versions
When used together with: Siemens » Simatic Reader Rf610r Cmiit » Version: N/A
Siemens » Simatic Reader Rf610r Etsi Firmware
Versions from including (>=) 3.0 and before (<) 4.0
cpe:2.3:o:siemens:simatic_reader_rf610r_etsi_firmware:*:*:*:*:*:*:*:*
Matching versions
When used together with: Siemens » Simatic Reader Rf610r Etsi » Version: N/A
Siemens » Simatic Reader Rf610r Fcc Firmware
Versions from including (>=) 3.0 and before (<) 4.0
cpe:2.3:o:siemens:simatic_reader_rf610r_fcc_firmware:*:*:*:*:*:*:*:*
Matching versions
When used together with: Siemens » Simatic Reader Rf610r Fcc » Version: N/A
Siemens » Simatic Reader Rf615r Cmiit Firmware
Versions from including (>=) 3.0 and before (<) 4.0
cpe:2.3:o:siemens:simatic_reader_rf615r_cmiit_firmware:*:*:*:*:*:*:*:*
Matching versions
When used together with: Siemens » Simatic Reader Rf615r Cmiit » Version: N/A
Siemens » Simatic Reader Rf615r Etsi Firmware
Versions from including (>=) 3.0 and before (<) 4.0
cpe:2.3:o:siemens:simatic_reader_rf615r_etsi_firmware:*:*:*:*:*:*:*:*
Matching versions
When used together with: Siemens » Simatic Reader Rf615r Etsi » Version: N/A
Siemens » Simatic Reader Rf615r Fcc Firmware
Versions from including (>=) 3.0 and before (<) 4.0
cpe:2.3:o:siemens:simatic_reader_rf615r_fcc_firmware:*:*:*:*:*:*:*:*
Matching versions
When used together with: Siemens » Simatic Reader Rf615r Fcc » Version: N/A
Siemens » Simatic Reader Rf650r Cmiit Firmware
Versions from including (>=) 3.0 and before (<) 4.0
cpe:2.3:o:siemens:simatic_reader_rf650r_cmiit_firmware:*:*:*:*:*:*:*:*
Matching versions
When used together with: Siemens » Simatic Reader Rf650r Cmiit » Version: N/A
Siemens » Simatic Reader Rf650r Etsi Firmware
Versions from including (>=) 3.0 and before (<) 4.0
cpe:2.3:o:siemens:simatic_reader_rf650r_etsi_firmware:*:*:*:*:*:*:*:*
Matching versions
When used together with: Siemens » Simatic Reader Rf650r Etsi » Version: N/A
Siemens » Simatic Reader Rf650r Fcc Firmware
Versions from including (>=) 3.0 and before (<) 4.0
cpe:2.3:o:siemens:simatic_reader_rf650r_fcc_firmware:*:*:*:*:*:*:*:*
Matching versions
When used together with: Siemens » Simatic Reader Rf650r Fcc » Version: N/A
Siemens » Simatic Reader Rf650r Arib Firmware
Versions from including (>=) 3.0 and before (<) 4.0
cpe:2.3:o:siemens:simatic_reader_rf650r_arib_firmware:*:*:*:*:*:*:*:*
Matching versions
When used together with: Siemens » Simatic Reader Rf650r Arib » Version: N/A
Siemens » Simatic Reader Rf680r Cmiit Firmware
Versions from including (>=) 3.0 and before (<) 4.0
cpe:2.3:o:siemens:simatic_reader_rf680r_cmiit_firmware:*:*:*:*:*:*:*:*
Matching versions
When used together with: Siemens » Simatic Reader Rf680r Cmiit » Version: N/A
Siemens » Simatic Reader Rf680r Etsi Firmware
Versions from including (>=) 3.0 and before (<) 4.0
cpe:2.3:o:siemens:simatic_reader_rf680r_etsi_firmware:*:*:*:*:*:*:*:*
Matching versions
When used together with: Siemens » Simatic Reader Rf680r Etsi » Version: N/A
Siemens » Simatic Reader Rf680r Fcc Firmware
Versions from including (>=) 3.0 and before (<) 4.0
cpe:2.3:o:siemens:simatic_reader_rf680r_fcc_firmware:*:*:*:*:*:*:*:*
Matching versions
When used together with: Siemens » Simatic Reader Rf680r Fcc » Version: N/A
Siemens » Simatic Reader Rf680r Arib Firmware
Versions from including (>=) 3.0 and before (<) 4.0
cpe:2.3:o:siemens:simatic_reader_rf680r_arib_firmware:*:*:*:*:*:*:*:*
Matching versions
When used together with: Siemens » Simatic Reader Rf680r Arib » Version: N/A
Siemens » Simatic Reader Rf685r Cmiit Firmware
Versions from including (>=) 3.0 and before (<) 4.0
cpe:2.3:o:siemens:simatic_reader_rf685r_cmiit_firmware:*:*:*:*:*:*:*:*
Matching versions
When used together with: Siemens » Simatic Reader Rf685r Cmiit » Version: N/A
Siemens » Simatic Reader Rf685r Etsi Firmware
Versions from including (>=) 3.0 and before (<) 4.0
cpe:2.3:o:siemens:simatic_reader_rf685r_etsi_firmware:*:*:*:*:*:*:*:*
Matching versions
When used together with: Siemens » Simatic Reader Rf685r Etsi » Version: N/A
Siemens » Simatic Reader Rf685r Fcc Firmware
Versions from including (>=) 3.0 and before (<) 4.0
cpe:2.3:o:siemens:simatic_reader_rf685r_fcc_firmware:*:*:*:*:*:*:*:*
Matching versions
When used together with: Siemens » Simatic Reader Rf685r Fcc » Version: N/A
Siemens » Simatic Reader Rf685r Arib Firmware
Versions from including (>=) 3.0 and before (<) 4.0
cpe:2.3:o:siemens:simatic_reader_rf685r_arib_firmware:*:*:*:*:*:*:*:*
Matching versions
When used together with: Siemens » Simatic Reader Rf685r Arib » Version: N/A

Exploit prediction scoring system (EPSS) score for CVE-2021-31340

EPSS FAQ

0.10%

Probability of exploitation activity in the next 30 days EPSS Score History

~ 41 %

Percentile, the proportion of vulnerabilities that are scored at or less

CVSS scores for CVE-2021-31340

Base Score	Base Severity	CVSS Vector	Exploitability Score	Impact Score	Score Source
5.0	MEDIUM	AV:N/AC:L/Au:N/C:N/I:N/A:P	10.0	2.9	NIST
Access Vector: Network Access Complexity: Low Authentication: None Confidentiality Impact: None Integrity Impact: None Availability Impact: Partial
7.5	HIGH	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H	3.9	3.6	NIST
Attack Vector: Network Attack Complexity: Low Privileges Required: None User Interaction: None Scope: Unchanged Confidentiality: None Integrity: None Availability: High

CWE ids for CVE-2021-31340

CWE-400 Uncontrolled Resource Consumption

The product 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.
Assigned by:
- nvd@nist.gov (Primary)
- productcert@siemens.com (Secondary)

References for CVE-2021-31340

https://cert-portal.siemens.com/productcert/pdf/ssa-787292.pdf

Mitigation;Patch;Vendor Advisory

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Vulnerability Details : CVE-2021-31340

Products affected by CVE-2021-31340

Exploit prediction scoring system (EPSS) score for CVE-2021-31340

CVSS scores for CVE-2021-31340

CWE ids for CVE-2021-31340

References for CVE-2021-31340