7.5
HIGH
CVE-2021-31340
Siemens SIMATIC RFID Remote Denial-of-Service Vulnerability
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.

INFO

Published Date :

June 8, 2021, 8:15 p.m.

Last Modified :

Oct. 6, 2022, 5:28 p.m.

Remotely Exploitable :

Yes !

Impact Score :

3.6

Exploitability Score :

3.9
Affected Products

The following products are affected by CVE-2021-31340 vulnerability. Even if cvefeed.io is aware of the exact versions of the products that are affected, the information is not represented in the table below.

ID Vendor Product Action
1 Siemens simatic_rf185c_firmware
2 Siemens simatic_rf186c_firmware
3 Siemens simatic_rf186ci_firmware
4 Siemens simatic_rf188ci_firmware
5 Siemens simatic_rf166c_firmware
6 Siemens simatic_rf188c_firmware
7 Siemens simatic_rf360r_firmware
8 Siemens simatic_reader_rf610r_cmiit_firmware
9 Siemens simatic_reader_rf610r_etsi_firmware
10 Siemens simatic_reader_rf610r_fcc_firmware
11 Siemens simatic_reader_rf615r_cmiit_firmware
12 Siemens simatic_reader_rf615r_etsi_firmware
13 Siemens simatic_reader_rf615r_fcc_firmware
14 Siemens simatic_reader_rf650r_cmiit_firmware
15 Siemens simatic_reader_rf650r_etsi_firmware
16 Siemens simatic_reader_rf650r_fcc_firmware
17 Siemens simatic_reader_rf650r_arib_firmware
18 Siemens simatic_reader_rf680r_cmiit_firmware
19 Siemens simatic_reader_rf680r_etsi_firmware
20 Siemens simatic_reader_rf680r_fcc_firmware
21 Siemens simatic_reader_rf680r_arib_firmware
22 Siemens simatic_reader_rf685r_cmiit_firmware
23 Siemens simatic_reader_rf685r_etsi_firmware
24 Siemens simatic_reader_rf685r_fcc_firmware
25 Siemens simatic_reader_rf685r_arib_firmware
References to Advisories, Solutions, and Tools

Here, you will find a curated list of external links that provide in-depth information, practical solutions, and valuable tools related to CVE-2021-31340.

URL Resource
https://cert-portal.siemens.com/productcert/pdf/ssa-787292.pdf Mitigation Patch Vendor Advisory

We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).

Results are limited to the first 15 repositories due to potential performance issues.

The following list is the news that have been mention CVE-2021-31340 vulnerability anywhere in the article.

The following table lists the changes that have been made to the CVE-2021-31340 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.

  • CVE Modified by [email protected]

    May. 14, 2024

    Action Type Old Value New Value
  • Modified Analysis by [email protected]

    Oct. 06, 2022

    Action Type Old Value New Value
    Changed CPE Configuration AND OR *cpe:2.3:o:siemens:simatic_rf360r_firmware:-:*:*:*:*:*:*:* OR cpe:2.3:h:siemens:simatic_rf360r:-:*:*:*:*:*:*:* AND OR *cpe:2.3:o:siemens:simatic_rf360r_firmware:*:*:*:*:*:*:*:* versions up to (excluding) 2.0 OR cpe:2.3:h:siemens:simatic_rf360r:-:*:*:*:*:*:*:*
  • CVE Modified by [email protected]

    May. 20, 2022

    Action Type Old Value New Value
    Changed 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), 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. 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.
  • Modified Analysis by [email protected]

    May. 13, 2022

    Action Type Old Value New Value
    Changed Reference Type https://cert-portal.siemens.com/productcert/pdf/ssa-787292.pdf Mitigation, Vendor Advisory https://cert-portal.siemens.com/productcert/pdf/ssa-787292.pdf Mitigation, Patch, Vendor Advisory
    Added CWE NIST CWE-400
    Changed CPE Configuration AND OR *cpe:2.3:o:siemens:simatic_rf615r_firmware:*:*:*:*:*:*:*:* versions from (including) 3.0 OR cpe:2.3:h:siemens:simatic_rf615r:-:*:*:*:*:*:*:* AND OR *cpe:2.3:o:siemens:simatic_reader_rf610r_cmiit_firmware:*:*:*:*:*:*:*:* versions from (including) 3.0 up to (excluding) 4.0 OR cpe:2.3:h:siemens:simatic_reader_rf610r_cmiit:-:*:*:*:*:*:*:*
    Changed CPE Configuration AND OR *cpe:2.3:o:siemens:simatic_rf680r_firmware:*:*:*:*:*:*:*:* versions from (including) 3.0 OR cpe:2.3:h:siemens:simatic_rf680r:-:*:*:*:*:*:*:* AND OR *cpe:2.3:o:siemens:simatic_reader_rf610r_etsi_firmware:*:*:*:*:*:*:*:* versions from (including) 3.0 up to (excluding) 4.0 OR cpe:2.3:h:siemens:simatic_reader_rf610r_etsi:-:*:*:*:*:*:*:*
    Changed CPE Configuration AND OR *cpe:2.3:o:siemens:simatic_rf685r_firmware:*:*:*:*:*:*:*:* versions from (including) 3.0 OR cpe:2.3:h:siemens:simatic_rf685r:-:*:*:*:*:*:*:* AND OR *cpe:2.3:o:siemens:simatic_reader_rf610r_fcc_firmware:*:*:*:*:*:*:*:* versions from (including) 3.0 up to (excluding) 4.0 OR cpe:2.3:h:siemens:simatic_reader_rf610r_fcc:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:siemens:simatic_reader_rf615r_cmiit_firmware:*:*:*:*:*:*:*:* versions from (including) 3.0 up to (excluding) 4.0 OR cpe:2.3:h:siemens:simatic_reader_rf615r_cmiit:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:siemens:simatic_reader_rf615r_etsi_firmware:*:*:*:*:*:*:*:* versions from (including) 3.0 up to (excluding) 4.0 OR cpe:2.3:h:siemens:simatic_reader_rf615r_etsi:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:siemens:simatic_reader_rf615r_fcc_firmware:*:*:*:*:*:*:*:* versions from (including) 3.0 up to (excluding) 4.0 OR cpe:2.3:h:siemens:simatic_reader_rf615r_fcc:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:siemens:simatic_reader_rf650r_cmiit_firmware:*:*:*:*:*:*:*:* versions from (including) 3.0 up to (excluding) 4.0 OR cpe:2.3:h:siemens:simatic_reader_rf650r_cmiit:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:siemens:simatic_reader_rf650r_etsi_firmware:*:*:*:*:*:*:*:* versions from (including) 3.0 up to (excluding) 4.0 OR cpe:2.3:h:siemens:simatic_reader_rf650r_etsi:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:siemens:simatic_reader_rf650r_fcc_firmware:*:*:*:*:*:*:*:* versions from (including) 3.0 up to (excluding) 4.0 OR cpe:2.3:h:siemens:simatic_reader_rf650r_fcc:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:siemens:simatic_reader_rf650r_arib_firmware:*:*:*:*:*:*:*:* versions from (including) 3.0 up to (excluding) 4.0 OR cpe:2.3:h:siemens:simatic_reader_rf650r_arib:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:siemens:simatic_reader_rf680r_cmiit_firmware:*:*:*:*:*:*:*:* versions from (including) 3.0 up to (excluding) 4.0 OR cpe:2.3:h:siemens:simatic_reader_rf680r_cmiit:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:siemens:simatic_reader_rf680r_etsi_firmware:*:*:*:*:*:*:*:* versions from (including) 3.0 up to (excluding) 4.0 OR cpe:2.3:h:siemens:simatic_reader_rf680r_etsi:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:siemens:simatic_reader_rf680r_fcc_firmware:*:*:*:*:*:*:*:* versions from (including) 3.0 up to (excluding) 4.0 OR cpe:2.3:h:siemens:simatic_reader_rf680r_fcc:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:siemens:simatic_reader_rf680r_arib_firmware:*:*:*:*:*:*:*:* versions from (including) 3.0 up to (excluding) 4.0 OR cpe:2.3:h:siemens:simatic_reader_rf680r_arib:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:siemens:simatic_reader_rf685r_cmiit_firmware:*:*:*:*:*:*:*:* versions from (including) 3.0 up to (excluding) 4.0 OR cpe:2.3:h:siemens:simatic_reader_rf685r_cmiit:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:siemens:simatic_reader_rf685r_etsi_firmware:*:*:*:*:*:*:*:* versions from (including) 3.0 up to (excluding) 4.0 OR cpe:2.3:h:siemens:simatic_reader_rf685r_etsi:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:siemens:simatic_reader_rf685r_fcc_firmware:*:*:*:*:*:*:*:* versions from (including) 3.0 up to (excluding) 4.0 OR cpe:2.3:h:siemens:simatic_reader_rf685r_fcc:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:siemens:simatic_reader_rf685r_arib_firmware:*:*:*:*:*:*:*:* versions from (including) 3.0 up to (excluding) 4.0 OR cpe:2.3:h:siemens:simatic_reader_rf685r_arib:-:*:*:*:*:*:*:*
  • CVE Modified by [email protected]

    Apr. 12, 2022

    Action Type Old Value New Value
    Changed 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), SIMATIC RF615R (All versions > V3.0), SIMATIC RF680R (All versions > V3.0), SIMATIC RF685R (All versions > V3.0). Affected devices do not properly handle large numbers of incoming connections. An attacker may leverage this to cause a Denial-of-Service situation. 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), 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.
  • Initial Analysis by [email protected]

    Jun. 22, 2021

    Action Type Old Value New Value
    Added CVSS V2 NIST (AV:N/AC:L/Au:N/C:N/I:N/A:P)
    Added CVSS V3.1 NIST AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
    Changed Reference Type https://cert-portal.siemens.com/productcert/pdf/ssa-787292.pdf No Types Assigned https://cert-portal.siemens.com/productcert/pdf/ssa-787292.pdf Mitigation, Vendor Advisory
    Added CPE Configuration AND OR *cpe:2.3:o:siemens:simatic_rf166c_firmware:*:*:*:*:*:*:*:* versions from (excluding) 1.1 up to (excluding) 1.3.2 OR cpe:2.3:h:siemens:simatic_rf166c:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:siemens:simatic_rf185c_firmware:*:*:*:*:*:*:*:* versions from (excluding) 1.1 up to (excluding) 1.3.2 OR cpe:2.3:h:siemens:simatic_rf185c:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:siemens:simatic_rf186c_firmware:*:*:*:*:*:*:*:* versions from (excluding) 1.1 up to (excluding) 1.3.2 OR cpe:2.3:h:siemens:simatic_rf186c:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:siemens:simatic_rf186ci_firmware:*:*:*:*:*:*:*:* versions from (excluding) 1.1 up to (excluding) 1.3.2 OR cpe:2.3:h:siemens:simatic_rf186ci:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:siemens:simatic_rf188c_firmware:*:*:*:*:*:*:*:* versions from (excluding) 1.1 up to (excluding) 1.3.2 OR cpe:2.3:h:siemens:simatic_rf188c:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:siemens:simatic_rf188ci_firmware:*:*:*:*:*:*:*:* versions from (excluding) 1.1 up to (excluding) 1.3.2 OR cpe:2.3:h:siemens:simatic_rf188ci:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:siemens:simatic_rf360r_firmware:-:*:*:*:*:*:*:* OR cpe:2.3:h:siemens:simatic_rf360r:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:siemens:simatic_rf615r_firmware:*:*:*:*:*:*:*:* versions from (including) 3.0 OR cpe:2.3:h:siemens:simatic_rf615r:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:siemens:simatic_rf680r_firmware:*:*:*:*:*:*:*:* versions from (including) 3.0 OR cpe:2.3:h:siemens:simatic_rf680r:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:siemens:simatic_rf685r_firmware:*:*:*:*:*:*:*:* versions from (including) 3.0 OR cpe:2.3:h:siemens:simatic_rf685r:-:*:*:*:*:*:*:*
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days. Following chart shows the EPSS score history of the vulnerability.
CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2021-31340 is associated with the following CWEs:

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2021-31340 weaknesses.

Exploit Prediction

EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.

0.10 }} 0.01%

score

0.40949

percentile

CVSS31 - Vulnerability Scoring System
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability