Vulnerability Details : CVE-2021-25676
A vulnerability has been identified in RUGGEDCOM RM1224 (V6.3), SCALANCE M-800 (V6.3), SCALANCE S615 (V6.3), SCALANCE SC-600 (All Versions >= V2.1 and < V2.1.3). Multiple failed SSH authentication attempts could trigger a temporary Denial-of-Service under certain conditions. When triggered, the device will reboot automatically.
Vulnerability category: Denial of service
Products affected by CVE-2021-25676
- cpe:2.3:o:siemens:scalance_m-800_firmware:6.3:*:*:*:*:*:*:*
- cpe:2.3:o:siemens:scalance_s615_firmware:6.3:*:*:*:*:*:*:*
- cpe:2.3:o:siemens:scalance_sc-600_firmware:*:*:*:*:*:*:*:*
- cpe:2.3:o:siemens:ruggedcom_rm1224_firmware:6.3:*:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2021-25676
0.10%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 43 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2021-25676
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-2021-25676
-
The product does not implement sufficient measures to prevent multiple failed authentication attempts within a short time frame.Assigned by: productcert@siemens.com (Primary)
References for CVE-2021-25676
-
https://us-cert.cisa.gov/ics/advisories/icsa-21-068-02
Siemens SCALANCE and RUGGEDCOM Devices SSH (Update A) | CISAThird Party Advisory;US Government Resource
-
https://cert-portal.siemens.com/productcert/pdf/ssa-296266.pdf
Vendor Advisory
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