CVE-2025-66406 - Vulnerability Details - OpenCVE

Step CA is an online certificate authority for secure, automated certificate management for DevOps. Prior to 0.29.0, there is an improper authorization check for SSH certificate revocation. This affects deployments configured with the SSHPOP provisioner. This vulnerability is fixed in 0.29.0.

No CVSS v4.0

Attack Vector Network

Attack Complexity High

Privileges Required High

Scope Unchanged

Confidentiality Impact None

Integrity Impact Low

Availability Impact High

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

No EPSS score available.

Exploitation none

Automatable no

Technical Impact partial

No data.

No data.

No data.

No data.

Advisories

Source	ID	Title
Github GHSA	GHSA-j7c9-79x7-8hpr	step-ca Has Improper Authorization Check for SSH Certificate Revocation

Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References

Link	Providers
https://github.com/smallstep/certificates/security/advisories/GHSA-j7c9-79x7-8hpr

History

Wed, 03 Dec 2025 22:15:00 +0000

Type	Values Removed	Values Added
Metrics		ssvc `{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}`

Wed, 03 Dec 2025 19:30:00 +0000

Type	Values Removed	Values Added
Description		Step CA is an online certificate authority for secure, automated certificate management for DevOps. Prior to 0.29.0, there is an improper authorization check for SSH certificate revocation. This affects deployments configured with the SSHPOP provisioner. This vulnerability is fixed in 0.29.0.
Title		Improper Authorization Check for SSH Certificate Revocation
Weaknesses		CWE-863
References		https://github.com/smallstep/certificates/security/advisories/GHSA-j7c9-79x7-8hpr
Metrics		cvssV3_1 `{'score': 5, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:N/I:L/A:H'}`

MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published: 2025-12-03T19:13:48.240Z

Updated: 2025-12-03T21:40:59.681Z

Reserved: 2025-11-28T23:33:56.365Z

Link: CVE-2025-66406

Vulnrichment

Updated: 2025-12-03T21:40:55.583Z

NVD

Status : Received

Published: 2025-12-03T20:16:26.560

Modified: 2025-12-03T20:16:26.560

Link: CVE-2025-66406

Redhat

No data.

OpenCVE Enrichment

No data.

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2025-66406", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "state": "PUBLISHED", "assignerShortName": "GitHub_M", "dateReserved": "2025-11-28T23:33:56.365Z", "datePublished": "2025-12-03T19:13:48.240Z", "dateUpdated": "2025-12-03T21:40:59.681Z"}, "containers": {"cna": {"title": "Improper Authorization Check for SSH Certificate Revocation", "problemTypes": [{"descriptions": [{"cweId": "CWE-863", "lang": "en", "description": "CWE-863: Incorrect Authorization", "type": "CWE"}]}], "metrics": [{"cvssV3_1": {"attackComplexity": "HIGH", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 5, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "LOW", "privilegesRequired": "HIGH", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:N/I:L/A:H", "version": "3.1"}}], "references": [{"name": "https://github.com/smallstep/certificates/security/advisories/GHSA-j7c9-79x7-8hpr", "tags": ["x_refsource_CONFIRM"], "url": "https://github.com/smallstep/certificates/security/advisories/GHSA-j7c9-79x7-8hpr"}], "affected": [{"vendor": "smallstep", "product": "certificates", "versions": [{"version": "< 0.29.0", "status": "affected"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2025-12-03T19:13:48.240Z"}, "descriptions": [{"lang": "en", "value": "Step CA is an online certificate authority for secure, automated certificate management for DevOps. Prior to 0.29.0, there is an improper authorization check for SSH certificate revocation. This affects deployments configured with the SSHPOP provisioner. This vulnerability is fixed in 0.29.0."}], "source": {"advisory": "GHSA-j7c9-79x7-8hpr", "discovery": "UNKNOWN"}}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2025-12-03T21:40:49.793375Z", "id": "CVE-2025-66406", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "role": "CISA Coordinator", "version": "2.0.3"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2025-12-03T21:40:59.681Z"}}]}}

{"dataType": "CVE_RECORD", "containers": {"adp": [{"title": "CISA ADP Vulnrichment", "metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2025-66406", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2025-12-03T21:40:49.793375Z"}}}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2025-12-03T21:40:55.583Z"}}], "cna": {"title": "Improper Authorization Check for SSH Certificate Revocation", "source": {"advisory": "GHSA-j7c9-79x7-8hpr", "discovery": "UNKNOWN"}, "metrics": [{"cvssV3_1": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 5, "attackVector": "NETWORK", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:N/I:L/A:H", "integrityImpact": "LOW", "userInteraction": "NONE", "attackComplexity": "HIGH", "availabilityImpact": "HIGH", "privilegesRequired": "HIGH", "confidentialityImpact": "NONE"}}], "affected": [{"vendor": "smallstep", "product": "certificates", "versions": [{"status": "affected", "version": "< 0.29.0"}]}], "references": [{"url": "https://github.com/smallstep/certificates/security/advisories/GHSA-j7c9-79x7-8hpr", "name": "https://github.com/smallstep/certificates/security/advisories/GHSA-j7c9-79x7-8hpr", "tags": ["x_refsource_CONFIRM"]}], "descriptions": [{"lang": "en", "value": "Step CA is an online certificate authority for secure, automated certificate management for DevOps. Prior to 0.29.0, there is an improper authorization check for SSH certificate revocation. This affects deployments configured with the SSHPOP provisioner. This vulnerability is fixed in 0.29.0."}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-863", "description": "CWE-863: Incorrect Authorization"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2025-12-03T19:13:48.240Z"}}}, "cveMetadata": {"cveId": "CVE-2025-66406", "state": "PUBLISHED", "dateUpdated": "2025-12-03T21:40:59.681Z", "dateReserved": "2025-11-28T23:33:56.365Z", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "datePublished": "2025-12-03T19:13:48.240Z", "assignerShortName": "GitHub_M"}, "dataVersion": "5.2"}