CVE-2023-39477
highpriority · track · 31EPSS 0.015 · 75 %ileEUUSEPSS · scored 2026-10-27
Inductive Automation Ignition ConditionRefresh Resource Exhaustion Denial-of-Service Vulnerability. This vulnerability allows remote attackers to create a denial-of-service condition on affected installations of Inductive Automation Ignition. Authentication is not required to exploit this vulnerability. The specific flaw exists within the handling of OPC UA ConditionRefresh requests. By sending a large number of requests, an attacker can consume all available resources on the server. An attacker can leverage this vulnerability to create a denial-of-service condition on the system. Was ZDI-CAN-20499.
cvss
Technical severity, 0–10. One row per scoring source.
base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 6.9–7.5
ssvc
A stakeholder decision — act, attend, or track — from exploitation and impact.
weaknesses
The CWE weakness classes this flaw belongs to.
affected products (2)
Products and version ranges known to be affected.
- inductiveautomation ignition8.1.0 → 8.1.33nvdUScpe:2.3:a:inductiveautomation:ignition:*:*:*:*:*:*:*:*
also known as (3)
Other names and identifiers for this entity.
sources
Which sources assert this record, and when.
references (7)
External citations — patches, advisories, analysis.
- https://cxsecurity.com/cveshow/CVE-2023-39477/cnnvd
- https://inductiveautomation.com/downloads/releasenotes/8.1.33cnnvd
- https://www.zerodayinitiative.com/advisories/ZDI-23-1050/cnnvd
- https://inductiveautomation.com/downloads/releasenotes/8.1.33enisa_euvd
- https://www.zerodayinitiative.com/advisories/ZDI-23-1050/enisa_euvd
- https://inductiveautomation.com/downloads/releasenotes/8.1.33Release Notesnvd
- https://www.zerodayinitiative.com/advisories/ZDI-23-1050/Third Party Advisorynvd
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