Vulnerability Details : CVE-2020-25241
A vulnerability has been identified in SIMATIC MV400 family (All Versions < V7.0.6). The underlying TCP stack of the affected products does not correctly validate the sequence number for incoming TCP RST packages. An attacker could exploit this to terminate arbitrary TCP sessions.
Vulnerability category: Input validation
Products affected by CVE-2020-25241
- cpe:2.3:o:siemens:simatic_mv440_sr_firmware:*:*:*:*:*:*:*:*
- cpe:2.3:o:siemens:simatic_mv440_hr_firmware:*:*:*:*:*:*:*:*
- cpe:2.3:o:siemens:simatic_mv440_ur_firmware:*:*:*:*:*:*:*:*
- cpe:2.3:o:siemens:simatic_mv420_sr-b_firmware:*:*:*:*:*:*:*:*
- cpe:2.3:o:siemens:simatic_mv420_sr-p_firmware:*:*:*:*:*:*:*:*
- cpe:2.3:o:siemens:simatic_mv420_sr-b_body_firmware:*:*:*:*:*:*:*:*
- cpe:2.3:o:siemens:simatic_mv420_sr-p_body_firmware:*:*:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2020-25241
0.10%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 42 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2020-25241
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
|---|---|---|---|---|---|---|
|
5.0
|
MEDIUM | AV:N/AC:L/Au:N/C:N/I:N/A:P |
10.0
|
2.9
|
NIST | |
|
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 |
CWE ids for CVE-2020-25241
-
The product uses untrusted input when calculating or using an array index, but the product does not validate or incorrectly validates the index to ensure the index references a valid position within the array.Assigned by: nvd@nist.gov (Primary)
-
The product receives input that is expected to specify an index, position, or offset into an indexable resource such as a buffer or file, but it does not validate or incorrectly validates that the specified index/position/offset has the required properties.Assigned by: productcert@siemens.com (Secondary)
References for CVE-2020-25241
-
https://cert-portal.siemens.com/productcert/pdf/ssa-599268.pdf
Vendor Advisory
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