CVE-2022-39249

{"id": "CVE-2022-39249", "metrics": {"cvssMetricV31": [{"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 7.5, "attackVector": "NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "NONE", "privilegesRequired": "NONE", "confidentialityImpact": "NONE"}, "impactScore": 3.6, "exploitabilityScore": 3.9}, {"type": "Secondary", "source": "security-advisories@github.com", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 7.5, "attackVector": "NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "NONE", "privilegesRequired": "NONE", "confidentialityImpact": "NONE"}, "impactScore": 3.6, "exploitabilityScore": 3.9}]}, "published": "2022-09-28T20:15:16.127", "references": [{"url": "https://github.com/matrix-org/matrix-js-sdk/commit/a587d7c36026fe1fcf93dfff63588abee359be76", "tags": ["Patch", "Third Party Advisory"], "source": "security-advisories@github.com"}, {"url": "https://github.com/matrix-org/matrix-js-sdk/releases/tag/v19.7.0", "tags": ["Release Notes", "Third Party Advisory"], "source": "security-advisories@github.com"}, {"url": "https://github.com/matrix-org/matrix-js-sdk/security/advisories/GHSA-6263-x97c-c4gg", "tags": ["Third Party Advisory"], "source": "security-advisories@github.com"}, {"url": "https://github.com/matrix-org/matrix-spec-proposals/pull/3061", "tags": ["Patch", "Third Party Advisory"], "source": "security-advisories@github.com"}, {"url": "https://matrix.org/blog/2022/09/28/upgrade-now-to-address-encryption-vulns-in-matrix-sdks-and-clients", "tags": ["Vendor Advisory"], "source": "security-advisories@github.com"}, {"url": "https://security.gentoo.org/glsa/202210-35", "tags": ["Third Party Advisory"], "source": "security-advisories@github.com"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Primary", "source": "nvd@nist.gov", "description": [{"lang": "en", "value": "CWE-287"}]}, {"type": "Secondary", "source": "security-advisories@github.com", "description": [{"lang": "en", "value": "CWE-287"}, {"lang": "en", "value": "CWE-322"}]}], "descriptions": [{"lang": "en", "value": "Matrix Javascript SDK is the Matrix Client-Server SDK for JavaScript. Prior to version 19.7.0, an attacker cooperating with a malicious homeserver can construct messages appearing to have come from another person. Such messages will be marked with a grey shield on some platforms, but this may be missing in others. This attack is possible due to the matrix-js-sdk implementing a too permissive key forwarding strategy on the receiving end. Starting with version 19.7.0, the default policy for accepting key forwards has been made more strict in the matrix-js-sdk. matrix-js-sdk will now only accept forwarded keys in response to previously issued requests and only from own, verified devices. The SDK now sets a `trusted` flag on the decrypted message upon decryption, based on whether the key used to decrypt the message was received from a trusted source. Clients need to ensure that messages decrypted with a key with `trusted = false` are decorated appropriately, for example, by showing a warning for such messages. This attack requires coordination between a malicious homeserver and an attacker, and those who trust your homeservers do not need a workaround."}, {"lang": "es", "value": "Matrix Javascript SDK es el SDK cliente-servidor de Matrix para JavaScript. En versiones anteriores a 19.7.0, un atacante que coopere con un servidor dom\u00e9stico malicioso puede construir mensajes que parezcan proceder de otra persona. Dichos mensajes estar\u00e1n marcados con un escudo gris en algunas plataformas, pero \u00e9ste puede faltar en otras. Este ataque es posible debido a que matrix-js-sdk implementa una estrategia de reenv\u00edo de claves demasiado permisiva en el extremo receptor. A partir de la versi\u00f3n 19.7.0, la pol\u00edtica por defecto para aceptar reenv\u00edos de claves se ha hecho m\u00e1s estricta en matrix-js-sdk. matrix-js-sdk ahora s\u00f3lo aceptar\u00e1 claves reenviadas en respuesta a peticiones previamente emitidas y s\u00f3lo de dispositivos propios y verificados. El SDK ahora establece un flag \"trusted\" en el mensaje descifrado al descifrarlo, bas\u00e1ndose en si la clave usada para descifrar el mensaje es recibida de una fuente confiable. Los clientes deben asegurarse de que los mensajes descifrados con una clave con \"trusted = false\" sean decorados adecuadamente, por ejemplo, mostrando una advertencia para tales mensajes. Este ataque requiere la coordinaci\u00f3n entre un servidor dom\u00e9stico malicioso y un atacante, y aquellos que conf\u00edan en sus servidores dom\u00e9sticos no necesitan una mitigaci\u00f3n"}], "lastModified": "2022-12-08T03:13:22.717", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:matrix:javascript_sdk:*:*:*:*:*:node.js:*:*", "vulnerable": true, "matchCriteriaId": "4755C737-8BCE-49AF-8D23-CD3D36F9EDA7", "versionEndExcluding": "19.7.0"}], "operator": "OR"}]}], "sourceIdentifier": "security-advisories@github.com"}