{"dataType": "CVE_RECORD", "dataVersion": "5.1", "cveMetadata": {"cveId": "CVE-2025-6444", "assignerOrgId": "99f1926a-a320-47d8-bbb5-42feb611262e", "state": "PUBLISHED", "assignerShortName": "zdi", "dateReserved": "2025-06-20T17:16:49.894Z", "datePublished": "2025-06-25T17:41:36.933Z", "dateUpdated": "2025-06-25T18:09:55.731Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "99f1926a-a320-47d8-bbb5-42feb611262e", "shortName": "zdi", "dateUpdated": "2025-06-25T17:41:36.933Z"}, "title": "ServiceStack GetErrorResponse Improper Input Validation NTLM Relay Vulnerability", "descriptions": [{"lang": "en", "value": "ServiceStack GetErrorResponse Improper Input Validation NTLM Relay Vulnerability. This vulnerability allows remote attackers to relay NTLM credentials on affected installations of ServiceStack. Interaction with this library is required to exploit this vulnerability but attack vectors may vary depending on the implementation.\n\nThe specific flaw exists within the implementation of the GetErrorResponse method. The issue results from the lack of proper validation of user-supplied data, which can result in a type confusion condition. An attacker can leverage this vulnerability to relay NTLM credentials in the context of the current user. Was ZDI-CAN-25834."}], "affected": [{"vendor": "ServiceStack", "product": "ServiceStack", "versions": [{"version": "8.4.0", "status": "affected"}], "defaultStatus": "unknown"}], "problemTypes": [{"descriptions": [{"lang": "en", "cweId": "CWE-20", "description": "CWE-20: Improper Input Validation", "type": "CWE"}]}], "references": [{"url": "https://www.zerodayinitiative.com/advisories/ZDI-25-415/", "name": "ZDI-25-415", "tags": ["x_research-advisory"]}], "dateAssigned": "2025-06-20T17:16:49.959Z", "datePublic": "2025-06-23T14:02:07.908Z", "source": {"lang": "en", "value": "Piotr Bazydlo (@chudypb) of Trend Micro Zero Day Initiative"}, "metrics": [{"format": "CVSS", "cvssV3_0": {"version": "3.0", "vectorString": "CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N", "baseScore": 5.9, "baseSeverity": "MEDIUM"}}]}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2025-06-25T18:09:41.688322Z", "id": "CVE-2025-6444", "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": "2025-06-25T18:09:55.731Z"}}]}}

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{"cveTags": [], "descriptions": [{"lang": "en", "value": "ServiceStack GetErrorResponse Improper Input Validation NTLM Relay Vulnerability. This vulnerability allows remote attackers to relay NTLM credentials on affected installations of ServiceStack. Interaction with this library is required to exploit this vulnerability but attack vectors may vary depending on the implementation.\n\nThe specific flaw exists within the implementation of the GetErrorResponse method. The issue results from the lack of proper validation of user-supplied data, which can result in a type confusion condition. An attacker can leverage this vulnerability to relay NTLM credentials in the context of the current user. Was ZDI-CAN-25834."}, {"lang": "es", "value": "Vulnerabilidad de retransmisi\u00f3n NTLM por validaci\u00f3n de entrada incorrecta en ServiceStack GetErrorResponse. Esta vulnerabilidad permite a atacantes remotos retransmitir credenciales NTLM en las instalaciones afectadas de ServiceStack. Se requiere la interacci\u00f3n con esta librer\u00eda para explotar esta vulnerabilidad, pero los vectores de ataque pueden variar seg\u00fan la implementaci\u00f3n. La falla espec\u00edfica se encuentra en la implementaci\u00f3n del m\u00e9todo GetErrorResponse. El problema se debe a la falta de una validaci\u00f3n adecuada de los datos proporcionados por el usuario, lo que puede generar una confusi\u00f3n de tipos. Un atacante puede aprovechar esta vulnerabilidad para retransmitir credenciales NTLM en el contexto del usuario actual. Anteriormente, se describi\u00f3 como ZDI-CAN-25834."}], "id": "CVE-2025-6444", "lastModified": "2025-06-26T18:57:43.670", "metrics": {"cvssMetricV30": [{"cvssData": {"attackComplexity": "HIGH", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 5.9, "baseSeverity": "MEDIUM", "confidentialityImpact": "HIGH", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N", "version": "3.0"}, "exploitabilityScore": 2.2, "impactScore": 3.6, "source": "zdi-disclosures@trendmicro.com", "type": "Secondary"}]}, "published": "2025-06-25T18:15:24.463", "references": [{"source": "zdi-disclosures@trendmicro.com", "url": "https://www.zerodayinitiative.com/advisories/ZDI-25-415/"}], "sourceIdentifier": "zdi-disclosures@trendmicro.com", "vulnStatus": "Awaiting Analysis", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-20"}], "source": "zdi-disclosures@trendmicro.com", "type": "Primary"}]}

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