CVE-2022-37012

29.03.2023, 19:15

This vulnerability allows remote attackers to create a denial-of-service condition on affected installations of Unified Automation OPC UA C++ Demo Server 1.7.6-537. Authentication is not required to exploit this vulnerability. The specific flaw exists within the OpcUa_SecureListener_ProcessSessionCallRequest method. A crafted OPC UA message can force the server to incorrectly update a reference count. An attacker can leverage this vulnerability to create a denial-of-service condition on the system. Was ZDI-CAN-16927.

Provider	Type	Base Score	Atk. Vector	Atk. Complexity	Priv. Required	Vector
NIST	NIST	7.5 HIGH	NETWORK	LOW	NONE	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
zdi	CNA	7.5 HIGH	NETWORK	LOW	NONE	CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVE	ADP	---				---
CISA-ADP	ADP	---				---

Base Score

CVSS 3.x

EPSS Score

Percentile: 73%

Vendor	Product	Version
unified-automation	opc_ua_c\+\+_demo_server	1.7.6.537

𝑥

= Vulnerable software versions

Common Weakness Enumeration

CWE-911 - Improper Update of Reference Count
The software uses a reference count to manage a resource, but it does not update or incorrectly updates the reference count.

References

https://documentation.unified-automation.com/uasdkcpp/1.7.7/CHANGELOG.txt

https://www.zerodayinitiative.com/advisories/ZDI-22-1030/

https://documentation.unified-automation.com/uasdkcpp/1.7.7/CHANGELOG.txt

https://www.zerodayinitiative.com/advisories/ZDI-22-1030/