CVE-2021-37172
Siemens SIMATIC S7-1200 Password Bypassing Vulnerability
Description
A vulnerability has been identified in SIMATIC S7-1200 CPU family (incl. SIPLUS variants) (V4.5.0). Affected devices fail to authenticate against configured passwords when provisioned using TIA Portal V13. This could allow an attacker using TIA Portal V13 or later versions to bypass authentication and download arbitrary programs to the PLC. The vulnerability does not occur when TIA Portal V13 SP1 or any later version was used to provision the device.
INFO
Published Date :
Aug. 10, 2021, 11:15 a.m.
Last Modified :
July 1, 2022, 5:44 p.m.
Source :
[email protected]
Remotely Exploitable :
Yes !
Impact Score :
3.6
Exploitability Score :
3.9
Affected Products
The following products are affected by CVE-2021-37172
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-2021-37172.
| URL | Resource |
|---|---|
| https://cert-portal.siemens.com/productcert/pdf/ssa-830194.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-2021-37172 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2021-37172 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]
Jul. 01, 2022
Action Type Old Value New Value Added CPE Configuration OR *cpe:2.3:a:siemens:simatic_step_7_\(tia_portal\):*:*:*:*:*:*:*:* versions up to (including) 13.0 -
CVE Modified by [email protected]
Sep. 14, 2021
Action Type Old Value New Value Changed Description A vulnerability has been identified in SIMATIC S7-1200 CPU family (incl. SIPLUS variants) (V4.5.0). Affected devices fail to authenticate against configured passwords when provisioned using TIA Portal V13. This could allow an attacker using TIA Portal V17 or later versions to bypass authentication and download arbitrary programs to the PLC. The vulnerability does not occur when TIA Portal V13 SP1 or any later version was used to provision the device. A vulnerability has been identified in SIMATIC S7-1200 CPU family (incl. SIPLUS variants) (V4.5.0). Affected devices fail to authenticate against configured passwords when provisioned using TIA Portal V13. This could allow an attacker using TIA Portal V13 or later versions to bypass authentication and download arbitrary programs to the PLC. The vulnerability does not occur when TIA Portal V13 SP1 or any later version was used to provision the device. -
Initial Analysis by [email protected]
Aug. 20, 2021
Action Type Old Value New Value Added CVSS V2 NIST (AV:N/AC:L/Au:N/C:N/I:P/A:N) Added CVSS V3.1 NIST AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N Changed Reference Type https://cert-portal.siemens.com/productcert/pdf/ssa-830194.pdf No Types Assigned https://cert-portal.siemens.com/productcert/pdf/ssa-830194.pdf Patch, Vendor Advisory Added CWE NIST CWE-287 Added CPE Configuration AND OR *cpe:2.3:o:siemens:simatic_s7-1200_cpu_firmware:4.5.0:*:*:*:*:*:*:* OR cpe:2.3:h:siemens:cpu_1211c:-:*:*:*:*:*:*:* cpe:2.3:h:siemens:cpu_1212c:-:*:*:*:*:*:*:* cpe:2.3:h:siemens:cpu_1212fc:-:*:*:*:*:*:*:* cpe:2.3:h:siemens:cpu_1214c:-:*:*:*:*:*:*:* cpe:2.3:h:siemens:cpu_1214fc:-:*:*:*:*:*:*:* cpe:2.3:h:siemens:cpu_1215c:-:*:*:*:*:*:*:* cpe:2.3:h:siemens:cpu_1215fc:-:*:*:*:*:*:*:* cpe:2.3:h:siemens:cpu_1217c:-:*:*:*:*:*:*:*
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2021-37172 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-2021-37172
weaknesses.
Exploit Prediction
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.
0.08 }} 0.01%
score
0.34168
percentile