CVE-2022-39248

{"id": "CVE-2022-39248", "metrics": {"cvssMetricV31": [{"type": "Secondary", "source": "security-advisories@github.com", "cvssData": {"scope": "CHANGED", "version": "3.1", "baseScore": 8.6, "attackVector": "NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:H/A:N", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "NONE", "privilegesRequired": "NONE", "confidentialityImpact": "NONE"}, "impactScore": 4.0, "exploitabilityScore": 3.9}, {"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}]}, "published": "2022-09-28T20:15:15.667", "references": [{"url": "https://github.com/matrix-org/matrix-android-sdk2/commit/77df720a238d17308deab83ecaa37f7a4740a17e", "tags": ["Patch", "Third Party Advisory"], "source": "security-advisories@github.com"}, {"url": "https://github.com/matrix-org/matrix-android-sdk2/releases/tag/v1.5.1", "tags": ["Release Notes", "Third Party Advisory"], "source": "security-advisories@github.com"}, {"url": "https://github.com/matrix-org/matrix-android-sdk2/security/advisories/GHSA-fpgf-pjjv-2qgm", "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://github.com/matrix-org/matrix-android-sdk2/commit/77df720a238d17308deab83ecaa37f7a4740a17e", "tags": ["Patch", "Third Party Advisory"], "source": "af854a3a-2127-422b-91ae-364da2661108"}, {"url": "https://github.com/matrix-org/matrix-android-sdk2/releases/tag/v1.5.1", "tags": ["Release Notes", "Third Party Advisory"], "source": "af854a3a-2127-422b-91ae-364da2661108"}, {"url": "https://github.com/matrix-org/matrix-android-sdk2/security/advisories/GHSA-fpgf-pjjv-2qgm", "tags": ["Patch", "Third Party Advisory"], "source": "af854a3a-2127-422b-91ae-364da2661108"}, {"url": "https://matrix.org/blog/2022/09/28/upgrade-now-to-address-encryption-vulns-in-matrix-sdks-and-clients", "tags": ["Vendor Advisory"], "source": "af854a3a-2127-422b-91ae-364da2661108"}], "vulnStatus": "Modified", "weaknesses": [{"type": "Secondary", "source": "security-advisories@github.com", "description": [{"lang": "en", "value": "CWE-287"}, {"lang": "en", "value": "CWE-322"}]}], "descriptions": [{"lang": "en", "value": "matrix-android-sdk2 is the Matrix SDK for Android. Prior to version 1.5.1, an attacker cooperating with a malicious homeserver can construct messages that legitimately appear to have come from another person, without any indication such as a grey shield. Additionally, a sophisticated attacker cooperating with a malicious homeserver could employ this vulnerability to perform a targeted attack in order to send fake to-device messages appearing to originate from another user. This can allow, for example, to inject the key backup secret during a self-verification, to make a targeted device start using a malicious key backup spoofed by the homeserver. matrix-android-sdk2 would then additionally sign such a key backup with its device key, spilling trust over to other devices trusting the matrix-android-sdk2 device. These attacks are possible due to a protocol confusion vulnerability that accepts to-device messages encrypted with Megolm instead of Olm. matrix-android-sdk2 version 1.5.1 has been modified to only accept Olm-encrypted to-device messages and to stop signing backups on a successful decryption. Out of caution, several other checks have been audited or added. This attack requires coordination between a malicious home server and an attacker, so those who trust their home servers do not need a workaround."}, {"lang": "es", "value": "matrix-android-sdk2 es el SDK de Matrix para Android. Versiones anteriores a 1.5.1, un atacante que coopere con un servidor dom\u00e9stico malicioso puede construir mensajes que parezcan leg\u00edtimamente proceder de otra persona, sin ninguna indicaci\u00f3n como un escudo gris. Adem\u00e1s, un atacante sofisticado que coopere con un servidor dom\u00e9stico malicioso podr\u00eda emplear esta vulnerabilidad para llevar a cabo un ataque dirigido con el fin de enviar mensajes falsos al dispositivo que parezcan proceder de otro usuario. Esto puede permitir, por ejemplo, inyectar el secreto de la copia de seguridad de la clave durante una autoverificaci\u00f3n, para hacer que un dispositivo objetivo comience a usar una copia de seguridad de la clave maliciosa falsificada por el servidor dom\u00e9stico. matrix-android-sdk2 firmar\u00eda entonces adicionalmente dicha copia de seguridad de la clave con su clave de dispositivo, derramando la confianza sobre otros dispositivos que conf\u00edan en el dispositivo matrix-android-sdk2. Estos ataques son posibles debido a una vulnerabilidad de confusi\u00f3n del protocolo que acepta mensajes to-device encriptados con Megolm en lugar de Olm. matrix-android-sdk2 versi\u00f3n 1.5.1 ha sido modificada para que s\u00f3lo acepte mensajes to-device encriptados con Olm y para que deje de firmar las copias de seguridad en caso de una desencriptaci\u00f3n con \u00e9xito. Por precauci\u00f3n, han sido auditadas o a\u00f1adidas otras comprobaciones. Este ataque requiere la coordinaci\u00f3n entre un servidor dom\u00e9stico malicioso y un atacante, por lo que aquellos que conf\u00edan en sus servidores dom\u00e9sticos no necesitan una mitigaci\u00f3n"}], "lastModified": "2024-11-21T07:17:52.300", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:matrix:software_development_kit:*:*:*:*:*:android:*:*", "vulnerable": true, "matchCriteriaId": "231326EC-E0CB-4DC3-9289-136E15960293", "versionEndExcluding": "1.5.1"}], "operator": "OR"}]}], "sourceIdentifier": "security-advisories@github.com"}