{
  "id": "CVE-2024-25623",
  "sourceIdentifier": "security-advisories@github.com",
  "published": "2024-02-19T16:15:51.847",
  "lastModified": "2024-02-20T19:50:53.960",
  "vulnStatus": "Awaiting Analysis",
  "descriptions": [
    {
      "lang": "en",
      "value": "Mastodon is a free, open-source social network server based on ActivityPub. 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."
    }
  ],
  "metrics": {
    "cvssMetricV31": [
      {
        "source": "security-advisories@github.com",
        "type": "Secondary",
        "cvssData": {
          "version": "3.1",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:H/A:N",
          "attackVector": "NETWORK",
          "attackComplexity": "LOW",
          "privilegesRequired": "LOW",
          "userInteraction": "NONE",
          "scope": "CHANGED",
          "confidentialityImpact": "LOW",
          "integrityImpact": "HIGH",
          "availabilityImpact": "NONE",
          "baseScore": 8.5,
          "baseSeverity": "HIGH"
        },
        "exploitabilityScore": 3.1,
        "impactScore": 4.7
      }
    ]
  },
  "weaknesses": [
    {
      "source": "security-advisories@github.com",
      "type": "Primary",
      "description": [
        {
          "lang": "en",
          "value": "CWE-434"
        }
      ]
    }
  ],
  "references": [
    {
      "url": "https://github.com/mastodon/mastodon/commit/9fee5e852669e26f970e278021302e1a203fc022",
      "source": "security-advisories@github.com"
    },
    {
      "url": "https://github.com/mastodon/mastodon/security/advisories/GHSA-jhrq-qvrm-qr36",
      "source": "security-advisories@github.com"
    }
  ]
}