high
7.5
CWE
1287 20
Advisory Published
Updated

CVE-2021-44694: Input Validation

First published: Tue Dec 13 2022(Updated: )

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.

Credit: productcert@siemens.com

Affected SoftwareAffected VersionHow to fix
Siemens SIMATIC S7 PLCSIM Advanced Firmware<5.0
Siemens SIMATIC S7-PLCSIM Advanced Firmware
Siemens S7-1200 CPU 1211C Firmware<4.6.0
Siemens SIMATIC S7-1200 CPU
Siemens S7-1200 CPU 1212C Firmware<4.6.0
Siemens SIMATIC S7-1200 CPU
Siemens S7-1200 CPU 1212FC Firmware<4.6.0
Siemens SIMATIC S7-1200 CPU 1212FC DC/DC/DC
Siemens SIMATIC S7-1200 CPU 1214C Firmware<4.6.0
Siemens SIMATIC S7-1200 CPU 1214FC DC/DC/Rly
Siemens S7-1200 CPU 1214C Firmware<4.6.0
Siemens S7-1200 CPU 1214C
Siemens SIMATIC S7-1200 CPU 1214FC Firmware<4.6.0
Siemens SIMATIC S7-1200 CPU 1214FC DC/DC/Rly
Siemens SIMATIC S7-1200 CPU 1215FC Firmware<4.6.0
Siemens SIMATIC S7-1200 CPU 1215FC DC/DC/DC
Siemens SIMATIC S7-1200 CPU 1215C Firmware<4.6.0
Siemens CPU 1215C
Siemens SIMATIC S7-1200 CPU 1215 FC Firmware<4.6.0
Siemens SIMATIC S7-1200 CPU 1215FC DC/DC/DC
Siemens SIMATIC S7-1200 CPU 1217C DC/DC/DC<4.6.0
Siemens S7-1200 CPU 1217C
Siemens Simatic S7-1200 CPU 1211C Firmware<4.6.0
Siemens SIMATIC S7-1200 CPU 1211C
Siemens SIMATIC S7-1200 CPU 1212C Firmware<4.6.0
Siemens SIMATIC S7-1200 CPU 1212C
Siemens SIMATIC S7-1200 CPU 1212FC Firmware<4.6.0
Siemens SIMATIC S7-1200 CPU 1212FC
Siemens SIMATIC S7-1200 CPU 1214C Firmware<4.6.0
Siemens SIMATIC S7-1200 CPU 1214C Firmware
Siemens SIMATIC S7-1200 CPU 1214FC Firmware<4.6.0
Siemens SIMATIC S7-1200 CPU 1214FC
Siemens SIMATIC S7-1200 CPU 1215C Firmware<4.6.0
Siemens SIMATIC S7-1200 CPU 1215C Firmware
Siemens SIMATIC S7-1200 CPU 1215FC Firmware<4.6.0
Siemens SIMATIC S7-1200 CPU 1215FC Firmware
Siemens SIMATIC S7-1200 CPU 1217C Firmware<4.6.0
Siemens SIMATIC S7-1200 CPU 1217C
Siemens SIPLUS S7-1200 CP 1243-1<4.6.0
Siemens SIPLUS S7-1200 CP 1243-1
Siemens SIPLUS S7-1200<4.6.0
Siemens SIPLUS S7-1200
Siemens Simatic S7-1500 CPU 1507S F Firmware<3.0.1
Siemens Simatic S7-1500
Siemens SIMATIC S7-1500 CPU 1507S Firmware<3.0.1
Siemens Simatic S7-1500 CPU 1507S F Firmware
Siemens SIMATIC S7-1500 Firmware<3.0.1
Siemens Simatic S7-1500
Siemens Simatic S7-1500 CPU 1508S F<3.0.1
Siemens S7-1500 CPU
Siemens SIMATIC S7-1500 CPU 1510SP Firmware<3.0.1
Siemens SIMATIC S7-1500 CPU 1510SP F-1
Siemens SIMATIC S7-1500 CPU 1510SP Firmware<3.0.1
Siemens SIMATIC S7-1500 CPU 1510SP-1 PN
Siemens SIMATIC S7-1500 CPU 1511-1<3.0.1
Siemens SIMATIC S7-1500 CPU 1511-1 PN
Siemens SIMATIC S7-1500 CPU 1511-1 PN<3.0.1
Siemens SIMATIC S7-1511-1 PN CPU
Siemens SIMATIC S7-1500 CPU 1511C-1 Firmware<3.0.1
Siemens SIMATIC S7-1500 CPU 1511C-1 PN
Siemens SIMATIC S7-1500 CPU 1511C-1<3.0.1
Siemens SIMATIC S7-1511C-1 PN CPU
Siemens SIMATIC S7-1500 CPU 1511f-1 PN<3.0.1
Siemens SIMATIC S7-1511F-1 PN CPU
Siemens SIMATIC S7-1500 CPU 1511F-1 Firmware<3.0.1
Siemens SIMATIC S7-1500 CPU 1511F-1
Siemens SIMATIC S7-1500 CPU 1511T-1 Firmware<3.0.1
Siemens SIMATIC S7-1500 CPU 1511T-1 PN
Siemens SIMATIC S7-1500 CPU 1511TF-1<3.0.1
Siemens SIMATIC S7-1500 CPU 1511TF-1 PN
Siemens SIMATIC S7-1500 CPU 1512C Firmware<3.0.1
Siemens Simatic S7-1500
Siemens SIMATIC S7-1500 CPU 1512C-1 PN Firmware<3.0.1
Siemens SIMATIC S7-1500 CPU 1512C-1 PN
Siemens SIMATIC S7-1500 CPU 1512SP-1<3.0.1
Siemens SIMATIC S7-1500 CPU 1512SP-1 PN
Siemens SIMATIC S7-1500 CPU 1512SPF-1<3.0.1
Siemens SIMATIC S7-1500 CPU 1512SPF-1 Firmware
Siemens SIMATIC S7-1513-1 PN CPU<3.0.1
Siemens SIMATIC S7-1513-1 PN CPU
Siemens Siplus S7-1500 CPU 1513-1 PN Firmware<3.0.1
siemens SIMATIC S7-1500 CPU 1513-1 PN firmware
Siemens SIMATIC S7-1500 CPU 1513F-1<3.0.1
Siemens SIMATIC S7-1513F-1 PN CPU
Siemens SIMATIC S7-1500 CPU 1513f-1 PN<3.0.1
Siemens SIMATIC S7-1513F-1 PN CPU
Siemens SIMATIC S7-1500 CPU 1513R-1 PN Firmware<3.0.1
Siemens SIMATIC S7-1500 CPU 1513R-1 Firmware
Siemens Simatic S7-1500 CPU 1515-2 Firmware<3.0.1
Siemens SIMATIC S7-1500 CPU 1515-2 PN
Siemens Simatic S7-1500 CPU 1515-2 Firmware<3.0.1
Siemens SIMATIC S7-1515-2 PN CPU
Siemens SIMATIC S7-1500 CPU 151511C-1<3.0.1
Siemens SIMATIC S7-1500 CPU 151511C-1
Siemens SIMATIC S7-1500 CPU 151511F-1<3.0.1
Siemens SIMATIC S7-1500 CPU 1511F-1 Firmware
Siemens SIMATIC S7-1500 CPU 1515f-2 PN firmware<3.0.1
Siemens S7-1500 CPU
Siemens SIMATIC S7-1515F-2 PN CPU<3.0.1
Siemens SIMATIC S7-1515F-2 PN CPU
Siemens Simatic S7-1500 CPU 1515R-2 Firmware<3.0.1
Siemens SIMATIC S7-1500 CPU 1515R-2 PN
Siemens Simatic S7-1500 CPU 1515T-2 Firmware<3.0.1
Siemens Simatic S7-1500 CPU 1515T-2 Firmware
Siemens SIMATIC S7-1500 CPU 1515TF-2<3.0.1
Siemens SIMATIC S7-1500 CPU 1515TF-2 PN
Siemens SIMATIC S7-1500 CPU 1516-3<3.0.1
Siemens SIMATIC S7-1500 CPU 1516-3 PN
Siemens SIMATIC S7-1500 CPU 1516-3 DP Firmware<3.0.1
Siemens SIMATIC S7-1500 CPU 1516-3 DP Firmware
Siemens SIMATIC S7-1500 CPU 1516-3 PN Firmware<3.0.1
Siemens SIMATIC S7-1500 CPU 1516-3
Siemens SIMATIC S7-1500 CPU 1516-3 PN/DP Firmware<3.0.1
Siemens SIMATIC S7-1500 CPU 1516-3 PN/DP
Siemens SIMATIC S7-1500 CPU 1516F-3 Firmware<3.0.1
Siemens SIMATIC S7-1516F-3 PN/DP CPU
Siemens SIMATIC S7-1500 CPU 1516F-3 PN/DP Firmware<3.0.1
Siemens SIMATIC S7-1500 CPU 1516f-3 PN/DP
Siemens SIMATIC S7-1500 CPU 1516PRO-2 Firmware<3.0.1
Siemens SIMATIC S7-1500 CPU 1516pro-2 PN
Siemens SIMATIC S7-1500 CPU 1516PRO F Firmware<3.0.1
Siemens SIMATIC S7-1500 CPU 1516PRO F-2 PN
Siemens Simatic S7-1500 CPU 1516T-3<3.0.1
Siemens Simatic S7-1500 CPU 1516T-3 Firmware
Siemens SIMATIC S7-1500 CPU 1516TF-3 Firmware<3.0.1
Siemens S7-1500 CPU
Siemens SIMATIC S7-1500 CPU 1517-3 PN Firmware<3.0.1
Siemens SIMATIC S7-1517-3 PN/DP CPU
Siemens SIMATIC S7-1500 CPU 1517-3 DP<3.0.1
Siemens SIMATIC S7-1517-3 PN/DP CPU
Siemens SIMATIC S7-1500 CPU 1517-3 PN<3.0.1
Siemens SIMATIC S7-1517-3 PN/DP CPU
siemens SIMATIC S7-1500 CPU 1517-3 pn/dp firmware<3.0.1
Siemens SIMATIC S7-1500 CPU 1517-3 PN/DP
Siemens SIMATIC S7-1500 CPU 1517F-3<3.0.1
Siemens SIMATIC S7-1517F-3 PN/DP CPU
siemens SIMATIC S7-1500 CPU 1517f-3 pn/dp firmware<3.0.1
Siemens SIMATIC S7-1500 CPU 1517f-3 PN/DP
Siemens SIMATIC S7-1500 CPU 1517TF-3 PN/DP Firmware<3.0.1
Siemens SIMATIC S7-1500 CPU 1517TF-3 PN/DP
Siemens SIMATIC S7-1500 CPU 1518F-4<3.0.1
Siemens Simatic S7-1500
Siemens SIMATIC S7-1500 CPU 1518-4<3.0.1
Siemens Simatic S7-1500 CPU 1518-4 DP
Siemens Simatic S7-1500 CPU 1518-4 DP<3.0.1
Siemens S7-1500 CPU
Siemens Simatic S7-1500 CPU 1518-4 PN Firmware<3.0.1
Siemens SIMATIC CPU 1518-4
Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP Firmware<3.0.1
Siemens Simatic S7-1500 CPU 1518-4 PN/DP MFP
Siemens Simatic S7-1500 CPU 1518-4 PN/DP MFP<3.0.1
Siemens Simatic S7-1500 CPU 1518-4 PN/DP MFP
Siemens SIMATIC S7-1500 CPU 1518F-4<3.0.1
Siemens SIMATIC S7-1500 CPU 1518F-4 Firmware
Siemens SIMATIC S7-1500 CPU 1518f-4 pn/dp firmware<3.0.1
Siemens SIMATIC S7-1500 CPU 1518F-4 PN/DP
Siemens Simatic S7-1500 CPU 1518HF-4<3.0.1
Siemens SIMATIC S7-1500 CPU 1518HF-4 Firmware
Siemens SIMATIC S7-1500 CPU 1518T-4 Firmware<3.0.1
Siemens S7-1500 CPU
Siemens SIMATIC S7-1500 CPU 1518T-4 Firmware<3.0.1
Siemens S7-1500 CPU
Siemens SIMATIC S7-1500 CPU 15PROF-2 Firmware<3.0.1
Siemens SIMATIC S7-1500 CPU 15PRO-2 Firmware
Siemens Simatic S7-1500 CPU 15PROF-2<3.0.1
Siemens SIMATIC S7-1500 CPU 15PROF-2 Firmware
Siemens Simatic S7-1500 CPU 1513Pro-2<3.0.1
Siemens Simatic S7-1500 CPU 1513Pro-2
Siemens SIMATIC S7-1500 CPU 1513PROF-2 Firmware<3.0.1
Siemens SIMATIC S7-1500 CPU 1513PROF-2 Firmware
Siemens SIPLUS ET 200SP CP 1542SP-1 IRC TX Rail<3.0.1
Siemens SIPLUS ET 200SP CP 1542SP-1 IRC TX Rail Firmware
Siemens SIPLUS ET 200SP CP 1543SP-1 ISEC TX Rail Firmware<3.0.1
Siemens SIPLUS ET 200SP CP 1543SP-1 ISEC TX Rail
Siemens SIPLUS ET 200SP CP 1543SP-1 ISEC Firmware<3.0.1
Siemens SIPLUS ET 200SP CP 1543SP-1 ISEC
Siemens Simatic ET200SP 1515SP PC2 Firmware
Siemens SIMATIC ET 200SP Open Controller CPU 1515SP PC
Siemens S7-1500 Modular Controllers
Siemens SIMATIC S7-1500 Controller
Siemens Simatic TIM 1531 IRC Firmware
Siemens Simatic TIM 1531 IRC Firmware
Siemens TIM 1531 IRC Firmware
Siemens TIM 1531 IRC Firmware

Remedy

https://cert-portal.siemens.com/productcert/pdf/ssa-382653.pdf

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Reference Links

Frequently Asked Questions

  • What is the severity of CVE-2021-44694?

    CVE-2021-44694 has been designated a medium severity vulnerability due to its potential to cause denial of service.

  • How do I fix CVE-2021-44694?

    To mitigate CVE-2021-44694, users should apply the latest firmware updates provided by Siemens for affected devices.

  • Which Siemens devices are affected by CVE-2021-44694?

    CVE-2021-44694 affects several Siemens SIMATIC S7-1200 and S7-1500 CPUs and firmware versions prior to specified releases.

  • What kind of attack does CVE-2021-44694 allow?

    CVE-2021-44694 allows attackers to send specially crafted packets to port 102/tcp, potentially leading to a denial of service.

  • Is there a workaround for CVE-2021-44694?

    Currently, the recommended approach to mitigate CVE-2021-44694 is to update to the latest firmware version, as no specific workaround is available.

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