CVE-2021-34813

{"id": "CVE-2021-34813", "metrics": {"cvssMetricV2": [{"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"version": "2.0", "baseScore": 7.5, "accessVector": "NETWORK", "vectorString": "AV:N/AC:L/Au:N/C:P/I:P/A:P", "authentication": "NONE", "integrityImpact": "PARTIAL", "accessComplexity": "LOW", "availabilityImpact": "PARTIAL", "confidentialityImpact": "PARTIAL"}, "acInsufInfo": false, "impactScore": 6.4, "baseSeverity": "HIGH", "obtainAllPrivilege": false, "exploitabilityScore": 10.0, "obtainUserPrivilege": false, "obtainOtherPrivilege": false, "userInteractionRequired": false}], "cvssMetricV31": [{"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 9.8, "attackVector": "NETWORK", "baseSeverity": "CRITICAL", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "HIGH"}, "impactScore": 5.9, "exploitabilityScore": 3.9}]}, "published": "2021-06-16T18:15:09.730", "references": [{"url": "https://gitlab.matrix.org/matrix-org/olm/-/commit/ccc0d122ee1b4d5e5ca4ec1432086be17d5f901b", "tags": ["Patch", "Vendor Advisory"], "source": "cve@mitre.org"}, {"url": "https://gitlab.matrix.org/matrix-org/olm/-/releases/3.2.3", "tags": ["Release Notes", "Vendor Advisory"], "source": "cve@mitre.org"}, {"url": "https://matrix.org/blog/2021/06/14/adventures-in-fuzzing-libolm", "tags": ["Exploit", "Patch", "Vendor Advisory"], "source": "cve@mitre.org"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Primary", "source": "nvd@nist.gov", "description": [{"lang": "en", "value": "CWE-787"}]}], "descriptions": [{"lang": "en", "value": "Matrix libolm before 3.2.3 allows a malicious Matrix homeserver to crash a client (while it is attempting to retrieve an Olm encrypted room key backup from the homeserver) because olm_pk_decrypt has a stack-based buffer overflow. Remote code execution might be possible for some nonstandard build configurations."}, {"lang": "es", "value": "Matrix libolm versiones anteriores a 3.2.3 permite a un homeserver de Matrix malicioso bloquear a un cliente (mientras intenta recuperar una copia de seguridad de la clave de la sala cifrada por Olm desde el homeserver) porque la funci\u00f3n olm_pk_decrypt presenta un desbordamiento de b\u00fafer en la regi\u00f3n stack de la memoria. Una ejecuci\u00f3n de c\u00f3digo remota podr\u00eda ser posible para algunas configuraciones de construcci\u00f3n no est\u00e1ndar"}], "lastModified": "2021-06-23T14:29:37.357", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:matrix:olm:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "20186CE3-75A8-4275-8CA1-709F930424B6", "versionEndExcluding": "3.2.3"}], "operator": "OR"}]}], "sourceIdentifier": "cve@mitre.org"}