SYT-2022-7: NULL pointer dereference vulnerability in OPC UA C++ SDK, Secure Integration Server, edgeConnector and edgeAggregator

Publisher: Softing Industrial Automation GmbH Document category: csaf_security_advisory
Initial release date: 2022-07-29T10:00:00.000Z Engine: Secvisogram 1.14.0
Current release date: 2022-07-29T10:00:00.000Z Build Date: 2022-08-01T07:41:31.314Z
Current version: 1.0.0 Status: final
CVSSv3.1 Base Score: 7.5 Severity: high
Original language: en-US Language:
Also referred to:

Vulnerabilities

(CVE-2022-1748)

The application crashes after several OPC UA methods have been called and the OPC UA session is closed before the methods have been finished.

CWE: CWE-476:NULL Pointer Dereference
Discovery date: 2022-05-10T10:00:00.000Z

Product status

Known affected
Product CVSS-Vector CVSS Base Score
Softing OPC UA C++ SDK V6.00 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H 7.5
Softing Secure Integration Server V1.22 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H 7.5
Softing edgeConnector Siemens V3.10 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H 7.5
Softing edgeConnector 840D V3.10 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H 7.5
Softing edgeConnector Modbus V3.10 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H 7.5
Softing edgeAggregator V3.10 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H 7.5

Remediations

Mitigation

Disable the posibility to establish unauthenticated sessions to the OPC UA server, because the atttack works on an established OPC UA session.

For products:
Workaround

Remove the optional methods „ResendData“ (ns=0;i=12873 and ns=0;i=12871) und „GetMonitoredItems“ (ns=0;i=11492 and ns=0;i=11489) from address space. Only these methods are affected. Or call the method Application::instance()->setEnableServiceGroup(EnumServiceGroup_Methods, false) during the server initialization to disable all OPC UA methods.

For products:
None available

Fix will be available with this version:

For products:

Acknowledgments

Softing Industrial Automation GmbH

Namespace: https://industrial.softing.com

Softing PSIRT - contact us at [email protected]

Revision history

Version Date of the revision Summary of the revision
1.0.0 2022-07-29T10:00:00.000Z Initial version

Disclaimer

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