CVE-2021-40871 — HIGH (7.5)

Vulnerability Description

An issue was discovered in Softing Industrial Automation OPC UA C++ SDK before 5.66. Remote attackers to cause a denial of service (DoS) by sending crafted messages to a OPC/UA client. The client process may crash unexpectedly because of a wrong type cast, and must be restarted.

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

Vendor	Product	Versions
Softing	Datafeed Opc Suite	< 5.18
Softing	Opc	< 5.66
Softing	Secure Integration Server	<= 1.22
Softing	Th Scope	>= 3.5

Related Weaknesses (CWE)

CWE-843

References

https://industrial.softing.com/Vendor Advisory
https://industrial.softing.com/fileadmin/sof-files/pdf/ia/support/Security_BulleVendor Advisory
https://industrial.softing.com/Vendor Advisory
https://industrial.softing.com/fileadmin/sof-files/pdf/ia/support/Security_BulleVendor Advisory

FAQ

What is CVE-2021-40871?

CVE-2021-40871 is a vulnerability with a CVSS score of 7.5 (HIGH). An issue was discovered in Softing Industrial Automation OPC UA C++ SDK before 5.66. Remote attackers to cause a denial of service (DoS) by sending crafted messages to a OPC/UA client. The client proc...

How severe is CVE-2021-40871?

CVE-2021-40871 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-2021-40871?

Check the references section above for vendor advisories and patch information. Affected products include: Softing Datafeed Opc Suite, Softing Opc, Softing Secure Integration Server, Softing Th Scope.