CVE-2023-27336: Softing edgeConnector Siemens OPC UA Server Null Pointer Dereference Denial-of-Service Vulnerability. This vulnerability allows remote attackers to create a denial-of-service condition on affected ...

Summary

Softing edgeConnector Siemens OPC UA Server Null Pointer Dereference Denial-of-Service Vulnerability. This vulnerability allows remote attackers to create a denial-of-service condition on affected installations of Softing edgeConnector Siemens. Authentication is not required to exploit this vulnerab...

What to do

Update softing edgeaggregator to version 3.70 or later.
Update softing edgeconnector to version 3.70 or later.
Update softing secure_integration_server to version 1.30 or later.

Affected software

Vendor	Product	Affected versions
softing	edgeaggregator	< 3.70 `cpe:2.3:a:softing:edgeaggregator::::::::`
softing	edgeconnector	< 3.70 `cpe:2.3:a:softing:edgeconnector::::::::`
softing	secure_integration_server	< 1.30 `cpe:2.3:a:softing:secure_integration_server::::::::`

Original advisory text

Softing edgeConnector Siemens OPC UA Server Null Pointer Dereference Denial-of-Service Vulnerability. This vulnerability allows remote attackers to create a denial-of-service condition on affected ...

Softing edgeConnector Siemens OPC UA Server Null Pointer Dereference Denial-of-Service Vulnerability. This vulnerability allows remote attackers to create a denial-of-service condition on affected installations of Softing edgeConnector Siemens. Authentication is not required to exploit this vulnerability.

The specific flaw exists within the handling of OPC client certificates. The issue results from dereferencing a NULL pointer. An attacker can leverage this vulnerability to create a denial-of-service condition on the system. Was ZDI-CAN-20508.

References

https://www.zerodayinitiative.com/advisories/ZDI-23-1065/ Third Party Advisory