{ "id": "CVE-2020-8897", "sourceIdentifier": "cve-coordination@google.com", "published": "2020-11-16T12:15:14.557", "lastModified": "2020-12-02T16:06:24.447", "vulnStatus": "Analyzed", "descriptions": [ { "lang": "en", "value": "A weak robustness vulnerability exists in the AWS Encryption SDKs for Java, Python, C and Javalcript prior to versions 2.0.0. Due to the non-committing property of AES-GCM (and other AEAD ciphers such as AES-GCM-SIV or (X)ChaCha20Poly1305) used by the SDKs to encrypt messages, an attacker can craft a unique cyphertext which will decrypt to multiple different results, and becomes especially relevant in a multi-recipient setting. We recommend users update their SDK to 2.0.0 or later." }, { "lang": "es", "value": "Se presenta una vulnerabilidad de robustez d\u00e9bil en los AWS Encryption SDKs para Java, Python, C y JavaScript versiones anteriores a 2.0.0. Debido a la propiedad non-committing de AES-GCM (y otros cifrados AEAD como AES-GCM-SIV o (X)ChaCha20Poly1305) usados por los SDK para cifrar mensajes, un atacante puede dise\u00f1ar un texto cifrado \u00fanico que descifrar\u00e1 a m\u00faltiples resultados, y se vuelve especialmente relevante en un entorno de m\u00faltiples destinatarios. Recomendamos a usuarios actualizar su SDK versiones hasta 2.0.0 o posteriores" } ], "metrics": { "cvssMetricV31": [ { "source": "nvd@nist.gov", "type": "Primary", "cvssData": { "version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "LOW", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "NONE", "baseScore": 8.1, "baseSeverity": "HIGH" }, "exploitabilityScore": 2.8, "impactScore": 5.2 }, { "source": "cve-coordination@google.com", "type": "Secondary", "cvssData": { "version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:N/I:H/A:N", "attackVector": "NETWORK", "attackComplexity": "HIGH", "privilegesRequired": "LOW", "userInteraction": "REQUIRED", "scope": "UNCHANGED", "confidentialityImpact": "NONE", "integrityImpact": "HIGH", "availabilityImpact": "NONE", "baseScore": 4.8, "baseSeverity": "MEDIUM" }, "exploitabilityScore": 1.2, "impactScore": 3.6 } ], "cvssMetricV2": [ { "source": "nvd@nist.gov", "type": "Primary", "cvssData": { "version": "2.0", "vectorString": "AV:N/AC:L/Au:S/C:P/I:P/A:N", "accessVector": "NETWORK", "accessComplexity": "LOW", "authentication": "SINGLE", "confidentialityImpact": "PARTIAL", "integrityImpact": "PARTIAL", "availabilityImpact": "NONE", "baseScore": 5.5 }, "baseSeverity": "MEDIUM", "exploitabilityScore": 8.0, "impactScore": 4.9, "acInsufInfo": false, "obtainAllPrivilege": false, "obtainUserPrivilege": false, "obtainOtherPrivilege": false, "userInteractionRequired": false } ] }, "weaknesses": [ { "source": "nvd@nist.gov", "type": "Primary", "description": [ { "lang": "en", "value": "CWE-327" } ] }, { "source": "cve-coordination@google.com", "type": "Secondary", "description": [ { "lang": "en", "value": "CWE-310" } ] } ], "configurations": [ { "nodes": [ { "operator": "OR", "negate": false, "cpeMatch": [ { "vulnerable": true, "criteria": "cpe:2.3:a:amazon:aws_encryption_sdk:*:*:*:*:*:*:*:*", "versionEndExcluding": "2.0.0", "matchCriteriaId": "8491D752-1C83-4B0B-941B-3AD03C000A2D" } ] } ] } ], "references": [ { "url": "https://aws.amazon.com/blogs/security/improved-client-side-encryption-explicit-keyids-and-key-commitment/", "source": "cve-coordination@google.com", "tags": [ "Vendor Advisory" ] }, { "url": "https://github.com/google/security-research/security/advisories/GHSA-wqgp-vphw-hphf", "source": "cve-coordination@google.com", "tags": [ "Exploit", "Mitigation", "Third Party Advisory" ] } ] }