CVE-2021-44695

Description

Affected devices don't process correctly certain special crafted packets sent to port 102/tcp, which could allow an attacker to cause a denial of service in the device.

Categories

4.9
CVSS
Severity: Medium
CVSS 3.1 •
EPSS 0.06%
Vendor Advisory siemens.com
Affected: Siemens SIMATIC Drive Controller CPU 1504D TF
Affected: Siemens SIMATIC Drive Controller CPU 1507D TF
Affected: Siemens SIMATIC ET 200SP Open Controller CPU 1515SP PC2 (incl. SIPLUS variants)
Affected: Siemens SIMATIC S7-1200 CPU family (incl. SIPLUS variants)
Affected: Siemens SIMATIC S7-1500 CPU 1510SP F-1 PN
Affected: Siemens SIMATIC S7-1500 CPU 1510SP-1 PN
Affected: Siemens SIMATIC S7-1500 CPU 1511-1 PN
Affected: Siemens SIMATIC S7-1500 CPU 1511-1 PN
Affected: Siemens SIMATIC S7-1500 CPU 1511C-1 PN
Affected: Siemens SIMATIC S7-1500 CPU 1511C-1 PN
Affected: Siemens SIMATIC S7-1500 CPU 1511F-1 PN
Affected: Siemens SIMATIC S7-1500 CPU 1511F-1 PN
Affected: Siemens SIMATIC S7-1500 CPU 1511T-1 PN
Affected: Siemens SIMATIC S7-1500 CPU 1511TF-1 PN
Affected: Siemens SIMATIC S7-1500 CPU 1512C-1 PN
Affected: Siemens SIMATIC S7-1500 CPU 1512C-1 PN
Affected: Siemens SIMATIC S7-1500 CPU 1512SP F-1 PN
Affected: Siemens SIMATIC S7-1500 CPU 1512SP-1 PN
Affected: Siemens SIMATIC S7-1500 CPU 1513-1 PN
Affected: Siemens SIMATIC S7-1500 CPU 1513-1 PN
Affected: Siemens SIMATIC S7-1500 CPU 1513F-1 PN
Affected: Siemens SIMATIC S7-1500 CPU 1513F-1 PN
Affected: Siemens SIMATIC S7-1500 CPU 1513R-1 PN
Affected: Siemens SIMATIC S7-1500 CPU 1515-2 PN
Affected: Siemens SIMATIC S7-1500 CPU 1515-2 PN
Affected: Siemens SIMATIC S7-1500 CPU 1515F-2 PN
Affected: Siemens SIMATIC S7-1500 CPU 1515F-2 PN
Affected: Siemens SIMATIC S7-1500 CPU 1515R-2 PN
Affected: Siemens SIMATIC S7-1500 CPU 1515T-2 PN
Affected: Siemens SIMATIC S7-1500 CPU 1515TF-2 PN
Affected: Siemens SIMATIC S7-1500 CPU 1516-3 PN/DP
Affected: Siemens SIMATIC S7-1500 CPU 1516-3 PN/DP
Affected: Siemens SIMATIC S7-1500 CPU 1516F-3 PN/DP
Affected: Siemens SIMATIC S7-1500 CPU 1516F-3 PN/DP
Affected: Siemens SIMATIC S7-1500 CPU 1516T-3 PN/DP
Affected: Siemens SIMATIC S7-1500 CPU 1516TF-3 PN/DP
Affected: Siemens SIMATIC S7-1500 CPU 1517-3 PN/DP
Affected: Siemens SIMATIC S7-1500 CPU 1517F-3 PN/DP
Affected: Siemens SIMATIC S7-1500 CPU 1517H-3 PN
Affected: Siemens SIMATIC S7-1500 CPU 1517T-3 PN/DP
Affected: Siemens SIMATIC S7-1500 CPU 1517TF-3 PN/DP
Affected: Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP
Affected: Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP
Affected: Siemens SIMATIC S7-1500 CPU 1518F-4 PN/DP
Affected: Siemens SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP
Affected: Siemens SIMATIC S7-1500 CPU 1518HF-4 PN
Affected: Siemens SIMATIC S7-1500 CPU 1518T-4 PN/DP
Affected: Siemens SIMATIC S7-1500 CPU 1518TF-4 PN/DP
Affected: Siemens SIMATIC S7-1500 CPU S7-1518-4 PN/DP ODK
Affected: Siemens SIMATIC S7-1500 CPU S7-1518F-4 PN/DP ODK
Affected: Siemens SIMATIC S7-1500 ET 200pro: CPU 1513PRO F-2 PN
Affected: Siemens SIMATIC S7-1500 ET 200pro: CPU 1513PRO-2 PN
Affected: Siemens SIMATIC S7-1500 ET 200pro: CPU 1516PRO F-2 PN
Affected: Siemens SIMATIC S7-1500 ET 200pro: CPU 1516PRO-2 PN
Affected: Siemens SIMATIC S7-1500 Software Controller V2
Affected: Siemens SIMATIC S7-PLCSIM Advanced
Affected: Siemens SIPLUS ET 200SP CPU 1510SP F-1 PN
Affected: Siemens SIPLUS ET 200SP CPU 1510SP F-1 PN RAIL
Affected: Siemens SIPLUS ET 200SP CPU 1510SP-1 PN
Affected: Siemens SIPLUS ET 200SP CPU 1510SP-1 PN
Affected: Siemens SIPLUS ET 200SP CPU 1510SP-1 PN RAIL
Affected: Siemens SIPLUS ET 200SP CPU 1510SP-1 PN RAIL
Affected: Siemens SIPLUS ET 200SP CPU 1512SP F-1 PN
Affected: Siemens SIPLUS ET 200SP CPU 1512SP F-1 PN
Affected: Siemens SIPLUS ET 200SP CPU 1512SP F-1 PN RAIL
Affected: Siemens SIPLUS ET 200SP CPU 1512SP F-1 PN RAIL
Affected: Siemens SIPLUS ET 200SP CPU 1512SP-1 PN
Affected: Siemens SIPLUS ET 200SP CPU 1512SP-1 PN
Affected: Siemens SIPLUS ET 200SP CPU 1512SP-1 PN RAIL
Affected: Siemens SIPLUS ET 200SP CPU 1512SP-1 PN RAIL
Affected: Siemens SIPLUS S7-1500 CPU 1511-1 PN
Affected: Siemens SIPLUS S7-1500 CPU 1511-1 PN
Affected: Siemens SIPLUS S7-1500 CPU 1511-1 PN
Affected: Siemens SIPLUS S7-1500 CPU 1511-1 PN
Affected: Siemens SIPLUS S7-1500 CPU 1511-1 PN T1 RAIL
Affected: Siemens SIPLUS S7-1500 CPU 1511-1 PN T1 RAIL
Affected: Siemens SIPLUS S7-1500 CPU 1511-1 PN TX RAIL
Affected: Siemens SIPLUS S7-1500 CPU 1511-1 PN TX RAIL
Affected: Siemens SIPLUS S7-1500 CPU 1511F-1 PN
Affected: Siemens SIPLUS S7-1500 CPU 1511F-1 PN
Affected: Siemens SIPLUS S7-1500 CPU 1513-1 PN
Affected: Siemens SIPLUS S7-1500 CPU 1513-1 PN
Affected: Siemens SIPLUS S7-1500 CPU 1513-1 PN
Affected: Siemens SIPLUS S7-1500 CPU 1513-1 PN
Affected: Siemens SIPLUS S7-1500 CPU 1513F-1 PN
Affected: Siemens SIPLUS S7-1500 CPU 1513F-1 PN
Affected: Siemens SIPLUS S7-1500 CPU 1515F-2 PN
Affected: Siemens SIPLUS S7-1500 CPU 1515F-2 PN
Affected: Siemens SIPLUS S7-1500 CPU 1515F-2 PN RAIL
Affected: Siemens SIPLUS S7-1500 CPU 1515F-2 PN T2 RAIL
Affected: Siemens SIPLUS S7-1500 CPU 1515R-2 PN
Affected: Siemens SIPLUS S7-1500 CPU 1515R-2 PN TX RAIL
Affected: Siemens SIPLUS S7-1500 CPU 1516-3 PN/DP
Affected: Siemens SIPLUS S7-1500 CPU 1516-3 PN/DP
Affected: Siemens SIPLUS S7-1500 CPU 1516-3 PN/DP
Affected: Siemens SIPLUS S7-1500 CPU 1516-3 PN/DP
Affected: Siemens SIPLUS S7-1500 CPU 1516-3 PN/DP RAIL
Affected: Siemens SIPLUS S7-1500 CPU 1516-3 PN/DP TX RAIL
Affected: Siemens SIPLUS S7-1500 CPU 1516F-3 PN/DP
Affected: Siemens SIPLUS S7-1500 CPU 1516F-3 PN/DP
Affected: Siemens SIPLUS S7-1500 CPU 1516F-3 PN/DP RAIL
Affected: Siemens SIPLUS S7-1500 CPU 1516F-3 PN/DP RAIL
Affected: Siemens SIPLUS S7-1500 CPU 1517H-3 PN
Affected: Siemens SIPLUS S7-1500 CPU 1518-4 PN/DP
Affected: Siemens SIPLUS S7-1500 CPU 1518-4 PN/DP MFP
Affected: Siemens SIPLUS S7-1500 CPU 1518F-4 PN/DP
Affected: Siemens SIPLUS S7-1500 CPU 1518HF-4 PN
Affected: Siemens SIPLUS TIM 1531 IRC
Affected: Siemens TIM 1531 IRC
Published at:
Updated at:

References

Link Tags
https://cert-portal.siemens.com/productcert/pdf/ssa-382653.pdf patch vendor advisory

Frequently Asked Questions

What is the severity of CVE-2021-44695?
CVE-2021-44695 has been scored as a medium severity vulnerability.
How to fix CVE-2021-44695?
To fix CVE-2021-44695, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2021-44695 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2021-44695 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2021-44695?
CVE-2021-44695 affects Siemens SIMATIC Drive Controller CPU 1504D TF, Siemens SIMATIC Drive Controller CPU 1507D TF, Siemens SIMATIC ET 200SP Open Controller CPU 1515SP PC2 (incl. SIPLUS variants), Siemens SIMATIC S7-1200 CPU family (incl. SIPLUS variants), Siemens SIMATIC S7-1500 CPU 1510SP F-1 PN, Siemens SIMATIC S7-1500 CPU 1510SP-1 PN, Siemens SIMATIC S7-1500 CPU 1511-1 PN, Siemens SIMATIC S7-1500 CPU 1511-1 PN, Siemens SIMATIC S7-1500 CPU 1511C-1 PN, Siemens SIMATIC S7-1500 CPU 1511C-1 PN, Siemens SIMATIC S7-1500 CPU 1511F-1 PN, Siemens SIMATIC S7-1500 CPU 1511F-1 PN, Siemens SIMATIC S7-1500 CPU 1511T-1 PN, Siemens SIMATIC S7-1500 CPU 1511TF-1 PN, Siemens SIMATIC S7-1500 CPU 1512C-1 PN, Siemens SIMATIC S7-1500 CPU 1512C-1 PN, Siemens SIMATIC S7-1500 CPU 1512SP F-1 PN, Siemens SIMATIC S7-1500 CPU 1512SP-1 PN, Siemens SIMATIC S7-1500 CPU 1513-1 PN, Siemens SIMATIC S7-1500 CPU 1513-1 PN, Siemens SIMATIC S7-1500 CPU 1513F-1 PN, Siemens SIMATIC S7-1500 CPU 1513F-1 PN, Siemens SIMATIC S7-1500 CPU 1513R-1 PN, Siemens SIMATIC S7-1500 CPU 1515-2 PN, Siemens SIMATIC S7-1500 CPU 1515-2 PN, Siemens SIMATIC S7-1500 CPU 1515F-2 PN, Siemens SIMATIC S7-1500 CPU 1515F-2 PN, Siemens SIMATIC S7-1500 CPU 1515R-2 PN, Siemens SIMATIC S7-1500 CPU 1515T-2 PN, Siemens SIMATIC S7-1500 CPU 1515TF-2 PN, Siemens SIMATIC S7-1500 CPU 1516-3 PN/DP, Siemens SIMATIC S7-1500 CPU 1516-3 PN/DP, Siemens SIMATIC S7-1500 CPU 1516F-3 PN/DP, Siemens SIMATIC S7-1500 CPU 1516F-3 PN/DP, Siemens SIMATIC S7-1500 CPU 1516T-3 PN/DP, Siemens SIMATIC S7-1500 CPU 1516TF-3 PN/DP, Siemens SIMATIC S7-1500 CPU 1517-3 PN/DP, Siemens SIMATIC S7-1500 CPU 1517F-3 PN/DP, Siemens SIMATIC S7-1500 CPU 1517H-3 PN, Siemens SIMATIC S7-1500 CPU 1517T-3 PN/DP, Siemens SIMATIC S7-1500 CPU 1517TF-3 PN/DP, Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP, Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP, Siemens SIMATIC S7-1500 CPU 1518F-4 PN/DP, Siemens SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP, Siemens SIMATIC S7-1500 CPU 1518HF-4 PN, Siemens SIMATIC S7-1500 CPU 1518T-4 PN/DP, Siemens SIMATIC S7-1500 CPU 1518TF-4 PN/DP, Siemens SIMATIC S7-1500 CPU S7-1518-4 PN/DP ODK, Siemens SIMATIC S7-1500 CPU S7-1518F-4 PN/DP ODK, Siemens SIMATIC S7-1500 ET 200pro: CPU 1513PRO F-2 PN, Siemens SIMATIC S7-1500 ET 200pro: CPU 1513PRO-2 PN, Siemens SIMATIC S7-1500 ET 200pro: CPU 1516PRO F-2 PN, Siemens SIMATIC S7-1500 ET 200pro: CPU 1516PRO-2 PN, Siemens SIMATIC S7-1500 Software Controller V2, Siemens SIMATIC S7-PLCSIM Advanced, Siemens SIPLUS ET 200SP CPU 1510SP F-1 PN, Siemens SIPLUS ET 200SP CPU 1510SP F-1 PN RAIL, Siemens SIPLUS ET 200SP CPU 1510SP-1 PN, Siemens SIPLUS ET 200SP CPU 1510SP-1 PN, Siemens SIPLUS ET 200SP CPU 1510SP-1 PN RAIL, Siemens SIPLUS ET 200SP CPU 1510SP-1 PN RAIL, Siemens SIPLUS ET 200SP CPU 1512SP F-1 PN, Siemens SIPLUS ET 200SP CPU 1512SP F-1 PN, Siemens SIPLUS ET 200SP CPU 1512SP F-1 PN RAIL, Siemens SIPLUS ET 200SP CPU 1512SP F-1 PN RAIL, Siemens SIPLUS ET 200SP CPU 1512SP-1 PN, Siemens SIPLUS ET 200SP CPU 1512SP-1 PN, Siemens SIPLUS ET 200SP CPU 1512SP-1 PN RAIL, Siemens SIPLUS ET 200SP CPU 1512SP-1 PN RAIL, Siemens SIPLUS S7-1500 CPU 1511-1 PN, Siemens SIPLUS S7-1500 CPU 1511-1 PN, Siemens SIPLUS S7-1500 CPU 1511-1 PN, Siemens SIPLUS S7-1500 CPU 1511-1 PN, Siemens SIPLUS S7-1500 CPU 1511-1 PN T1 RAIL, Siemens SIPLUS S7-1500 CPU 1511-1 PN T1 RAIL, Siemens SIPLUS S7-1500 CPU 1511-1 PN TX RAIL, Siemens SIPLUS S7-1500 CPU 1511-1 PN TX RAIL, Siemens SIPLUS S7-1500 CPU 1511F-1 PN, Siemens SIPLUS S7-1500 CPU 1511F-1 PN, Siemens SIPLUS S7-1500 CPU 1513-1 PN, Siemens SIPLUS S7-1500 CPU 1513-1 PN, Siemens SIPLUS S7-1500 CPU 1513-1 PN, Siemens SIPLUS S7-1500 CPU 1513-1 PN, Siemens SIPLUS S7-1500 CPU 1513F-1 PN, Siemens SIPLUS S7-1500 CPU 1513F-1 PN, Siemens SIPLUS S7-1500 CPU 1515F-2 PN, Siemens SIPLUS S7-1500 CPU 1515F-2 PN, Siemens SIPLUS S7-1500 CPU 1515F-2 PN RAIL, Siemens SIPLUS S7-1500 CPU 1515F-2 PN T2 RAIL, Siemens SIPLUS S7-1500 CPU 1515R-2 PN, Siemens SIPLUS S7-1500 CPU 1515R-2 PN TX RAIL, Siemens SIPLUS S7-1500 CPU 1516-3 PN/DP, Siemens SIPLUS S7-1500 CPU 1516-3 PN/DP, Siemens SIPLUS S7-1500 CPU 1516-3 PN/DP, Siemens SIPLUS S7-1500 CPU 1516-3 PN/DP, Siemens SIPLUS S7-1500 CPU 1516-3 PN/DP RAIL, Siemens SIPLUS S7-1500 CPU 1516-3 PN/DP TX RAIL, Siemens SIPLUS S7-1500 CPU 1516F-3 PN/DP, Siemens SIPLUS S7-1500 CPU 1516F-3 PN/DP, Siemens SIPLUS S7-1500 CPU 1516F-3 PN/DP RAIL, Siemens SIPLUS S7-1500 CPU 1516F-3 PN/DP RAIL, Siemens SIPLUS S7-1500 CPU 1517H-3 PN, Siemens SIPLUS S7-1500 CPU 1518-4 PN/DP, Siemens SIPLUS S7-1500 CPU 1518-4 PN/DP MFP, Siemens SIPLUS S7-1500 CPU 1518F-4 PN/DP, Siemens SIPLUS S7-1500 CPU 1518HF-4 PN, Siemens SIPLUS TIM 1531 IRC, Siemens TIM 1531 IRC.
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