CVE-2023-27336: edgeconnector Null Dereference (CVSS 7.5)

Description

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.

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CVSS v3.1 Score

7.5

HIGH

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Weakness Type (CWE)

CWE-476 CWE-476

Affected Products

Vendor	Product	Versions
softing	edgeaggregator	< 3.70
softing	edgeconnector	< 3.70
softing	secure_integration_server	< 1.30

References

Other References

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

Frequently Asked Questions

What is 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 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. It has a CVSS v3.1 base score of 7.5 (HIGH).

How severe is CVE-2023-27336? +

CVE-2023-27336 has a CVSS v3.1 score of 7.5 out of 10, rated HIGH. This is a high-severity vulnerability that should be prioritized for patching.

What products are affected by CVE-2023-27336? +

CVE-2023-27336 affects products from softing, specifically: edgeaggregator, edgeconnector, secure_integration_server. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2023-27336? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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