CVE-2021-37186
Simatic TCP/IP ISN Generation Remote Information Disclosure
Description
A vulnerability has been identified in LOGO! CMR2020 (All versions < V2.2), LOGO! CMR2040 (All versions < V2.2), SIMATIC RTU3010C (All versions < V4.0.9), SIMATIC RTU3030C (All versions < V4.0.9), SIMATIC RTU3031C (All versions < V4.0.9), SIMATIC RTU3041C (All versions < V4.0.9). The underlying TCP/IP stack does not properly calculate the random numbers used as ISN (Initial Sequence Numbers). An adjacent attacker with network access to the LAN interface could interfere with traffic, spoof the connection and gain access to sensitive information.
INFO
Published Date :
Sept. 14, 2021, 11:15 a.m.
Last Modified :
April 29, 2022, 5:19 p.m.
Source :
[email protected]
Remotely Exploitable :
No
Impact Score :
2.5
Exploitability Score :
2.8
Affected Products
The following products are affected by CVE-2021-37186
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.
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-2021-37186.
| URL | Resource |
|---|---|
| https://cert-portal.siemens.com/productcert/pdf/ssa-316383.pdf | 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-2021-37186 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2021-37186 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]
Apr. 29, 2022
Action Type Old Value New Value Changed CPE Configuration AND OR *cpe:2.3:o:siemens:simatic_rtu3010c_firmware:-:*:*:*:*:*:*:* OR cpe:2.3:h:siemens:simatic_rtu3010c:*:*:*:*:*:*:*:* AND OR *cpe:2.3:o:siemens:simatic_rtu3010c_firmware:*:*:*:*:*:*:*:* versions up to (excluding) 4.0.9 OR cpe:2.3:h:siemens:simatic_rtu3010c:*:*:*:*:*:*:*:* Changed CPE Configuration AND OR *cpe:2.3:o:siemens:simatic_rtu3030c_firmware:-:*:*:*:*:*:*:* OR cpe:2.3:h:siemens:simatic_rtu3030c:*:*:*:*:*:*:*:* AND OR *cpe:2.3:o:siemens:simatic_rtu3030c_firmware:*:*:*:*:*:*:*:* versions up to (excluding) 4.0.9 OR cpe:2.3:h:siemens:simatic_rtu3030c:*:*:*:*:*:*:*:* Changed CPE Configuration AND OR *cpe:2.3:o:siemens:simatic_rtu3031c_firmware:-:*:*:*:*:*:*:* OR cpe:2.3:h:siemens:simatic_rtu3031c:*:*:*:*:*:*:*:* AND OR *cpe:2.3:o:siemens:simatic_rtu3031c_firmware:*:*:*:*:*:*:*:* versions up to (excluding) 4.0.9 OR cpe:2.3:h:siemens:simatic_rtu3031c:*:*:*:*:*:*:*:* Changed CPE Configuration AND OR *cpe:2.3:o:siemens:simatic_rtu3041c_firmware:-:*:*:*:*:*:*:* OR cpe:2.3:h:siemens:simatic_rtu3041c:*:*:*:*:*:*:*:* AND OR *cpe:2.3:o:siemens:simatic_rtu3041c_firmware:*:*:*:*:*:*:*:* versions up to (excluding) 4.0.9 OR cpe:2.3:h:siemens:simatic_rtu3041c:*:*:*:*:*:*:*:* -
CVE Modified by [email protected]
Feb. 09, 2022
Action Type Old Value New Value Changed Description A vulnerability has been identified in LOGO! CMR2020 (All versions < V2.2), LOGO! CMR2040 (All versions < V2.2), SIMATIC RTU 3000 family (All versions). The underlying TCP/IP stack does not properly calculate the random numbers used as ISN (Initial Sequence Numbers). An adjacent attacker with network access to the LAN interface could interfere with traffic, spoof the connection and gain access to sensitive information. A vulnerability has been identified in LOGO! CMR2020 (All versions < V2.2), LOGO! CMR2040 (All versions < V2.2), SIMATIC RTU3010C (All versions < V4.0.9), SIMATIC RTU3030C (All versions < V4.0.9), SIMATIC RTU3031C (All versions < V4.0.9), SIMATIC RTU3041C (All versions < V4.0.9). The underlying TCP/IP stack does not properly calculate the random numbers used as ISN (Initial Sequence Numbers). An adjacent attacker with network access to the LAN interface could interfere with traffic, spoof the connection and gain access to sensitive information. -
Initial Analysis by [email protected]
Sep. 24, 2021
Action Type Old Value New Value Added CVSS V2 NIST (AV:A/AC:L/Au:N/C:P/I:P/A:N) Added CVSS V3.1 NIST AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N Changed Reference Type https://cert-portal.siemens.com/productcert/pdf/ssa-316383.pdf No Types Assigned https://cert-portal.siemens.com/productcert/pdf/ssa-316383.pdf Patch, Vendor Advisory Added CWE NIST CWE-330 Added CPE Configuration AND OR *cpe:2.3:o:siemens:logo\!_cmr2020_firmware:*:*:*:*:*:*:*:* versions up to (excluding) 2.2 OR cpe:2.3:h:siemens:logo\!_cmr2020:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:siemens:logo\!_cmr2040_firmware:*:*:*:*:*:*:*:* versions up to (excluding) 2.2 OR cpe:2.3:h:siemens:logo\!_cmr2040:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:siemens:simatic_rtu3010c_firmware:-:*:*:*:*:*:*:* OR cpe:2.3:h:siemens:simatic_rtu3010c:*:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:siemens:simatic_rtu3030c_firmware:-:*:*:*:*:*:*:* OR cpe:2.3:h:siemens:simatic_rtu3030c:*:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:siemens:simatic_rtu3031c_firmware:-:*:*:*:*:*:*:* OR cpe:2.3:h:siemens:simatic_rtu3031c:*:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:siemens:simatic_rtu3041c_firmware:-:*:*:*:*:*:*:* OR cpe:2.3:h:siemens:simatic_rtu3041c:*:*:*:*:*:*:*:*
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2021-37186 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-2021-37186
weaknesses.
Exploit Prediction
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.
0.06 }} 0.01%
score
0.24643
percentile