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HIGH · 7.5

CVE-2021-40365

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.

Vulnerability 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.

CVSS Score

7.5

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH

Affected Products

VendorProductVersions
SiemensSimatic S7-Plcsim Advanced Firmware< 5.0
SiemensSimatic S7-Plcsim Advanced-
SiemensSimatic S7-1200 Cpu 1211C Firmware< 4.6.0
SiemensSimatic S7-1200 Cpu 1211C-
SiemensSimatic S7-1200 Cpu 1212C Firmware< 4.6.0
SiemensSimatic S7-1200 Cpu 1212C-
SiemensSimatic S7-1200 Cpu 1212Fc Firmware< 4.6.0
SiemensSimatic S7-1200 Cpu 1212Fc-
SiemensSimatic S7-1200 Cpu 1214 Fc Firmware< 4.6.0
SiemensSimatic S7-1200 Cpu 1214 Fc-
SiemensSimatic S7-1200 Cpu 1214C Firmware< 4.6.0
SiemensSimatic S7-1200 Cpu 1214C-
SiemensSimatic S7-1200 Cpu 1214Fc Firmware< 4.6.0
SiemensSimatic S7-1200 Cpu 1214Fc-
SiemensSimatic S7-1200 Cpu 1215 Fc Firmware< 4.6.0
SiemensSimatic S7-1200 Cpu 1215 Fc-
SiemensSimatic S7-1200 Cpu 1215C Firmware< 4.6.0
SiemensSimatic S7-1200 Cpu 1215C-
SiemensSimatic S7-1200 Cpu 1215Fc Firmware< 4.6.0
SiemensSimatic S7-1200 Cpu 1215Fc-

Related Weaknesses (CWE)

CWE-20

References

FAQ

What is CVE-2021-40365?

CVE-2021-40365 is a vulnerability with a CVSS score of 7.5 (HIGH). 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.

How severe is CVE-2021-40365?

CVE-2021-40365 has been rated HIGH with a CVSS base score of 7.5/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2021-40365?

Check the references section above for vendor advisories and patch information. Affected products include: Siemens Simatic S7-Plcsim Advanced Firmware, Siemens Simatic S7-Plcsim Advanced, Siemens Simatic S7-1200 Cpu 1211C Firmware, Siemens Simatic S7-1200 Cpu 1211C, Siemens Simatic S7-1200 Cpu 1212C Firmware.