Vulnerability CVE-2021-40871
Published: 2021-11-10   Modified: 2021-11-11

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.

Type:

CWE-843

 (Access of Resource Using Incompatible Type ('Type Confusion'))

CVSS2 => (AV:N/AC:L/Au:N/C:N/I:N/A:P)

CVSS Base Score
Impact Subscore
Exploitability Subscore
5/10
2.9/10
10/10
Exploit range
Attack complexity
Authentication
Remote
Low
No required
Confidentiality impact
Integrity impact
Availability impact
None
None
Partial
Affected software
Softing -> Datafeed opc suite 
Softing -> OPC 
Softing -> Secure integration server 
Softing -> Th scope 

 References:
https://industrial.softing.com/
https://industrial.softing.com/fileadmin/sof-files/pdf/ia/support/Security_Bulletin-CVE-2021-40871.pdf
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