CVE-2024-25623

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Prior to versions 4.2.7, 4.1.15, 4.0.15, and 3.5.19, when fetching remote statuses, Mastodon doesn't check that the response from the remote server has a `Content-Type` header value of the Activity Streams media type, which allows a threat actor to upload a crafted Activity Streams document to a remote server and make a Mastodon server fetch it, if the remote server accepts arbitrary user uploads. The vulnerability allows a threat actor to impersonate an account on a remote server that satisfies all of the following properties: allows the attacker to register an account; accepts arbitrary user-uploaded documents and places them on the same domain as the ActivityPub actors; and serves user-uploaded document in response to requests with an `Accept` header value of the Activity Streams media type. Versions 4.2.7, 4.1.15, 4.0.15, and 3.5.19 contain a fix for this issue."}, {"lang": "es", "value": "Mastodon es un servidor de red social gratuito y de c\u00f3digo abierto basado en ActivityPub. Antes de las versiones 4.2.7, 4.1.15, 4.0.15 y 3.5.19, al recuperar estados remotos, Mastodon no verifica que la respuesta del servidor remoto tenga un valor de encabezado \"Tipo de contenido\" de los flujos de actividad. tipo de medio, que permite a un actor de amenazas cargar un documento de Activity Streams manipulado a un servidor remoto y hacer que un servidor Mastodon lo recupere, si el servidor remoto acepta cargas arbitrarias de usuarios. La vulnerabilidad permite a un actor de amenazas hacerse pasar por una cuenta en un servidor remoto que cumple con todas las siguientes propiedades: permite al atacante registrar una cuenta; acepta documentos arbitrarios subidos por usuarios y los coloca en el mismo dominio que los actores de ActivityPub; y proporciona documentos subidos por el usuario en respuesta a solicitudes con un valor de encabezado \"Aceptar\" del tipo de medio Activity Streams. Las versiones 4.2.7, 4.1.15, 4.0.15 y 3.5.19 contienen una soluci\u00f3n para este problema."}], "id": "CVE-2024-25623", "lastModified": "2026-06-17T07:16:18.837", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 8.5, "baseSeverity": "HIGH", "confidentialityImpact": "LOW", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "CHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:H/A:N", "version": "3.1"}, "exploitabilityScore": 3.1, "impactScore": 4.7, "source": "security-advisories@github.com", "type": "Secondary"}, {"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 7.7, "baseSeverity": "HIGH", "confidentialityImpact": "NONE", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "CHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:H/A:N", "version": "3.1"}, "exploitabilityScore": 3.1, "impactScore": 4.0, "source": "nvd@nist.gov", "type": "Primary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2024-25623", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2024-02-20T18:34:37.609043Z", "version": "2.0.3"}}]}, "published": "2024-02-19T16:15:51.847", "references": [{"source": "security-advisories@github.com", "tags": ["Patch"], "url": "https://github.com/mastodon/mastodon/commit/9fee5e852669e26f970e278021302e1a203fc022"}, {"source": "security-advisories@github.com", "tags": ["Vendor Advisory"], "url": "https://github.com/mastodon/mastodon/security/advisories/GHSA-jhrq-qvrm-qr36"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://github.com/mastodon/mastodon/commit/9fee5e852669e26f970e278021302e1a203fc022"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Vendor Advisory"], "url": "https://github.com/mastodon/mastodon/security/advisories/GHSA-jhrq-qvrm-qr36"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-434"}], "source": "security-advisories@github.com", "type": "Secondary"}, {"description": [{"lang": "en", "value": "CWE-434"}], "source": "nvd@nist.gov", "type": "Primary"}]}

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