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Exploiting this vulnerability is somewhat difficult because: - TLS protects against MITM which makes it difficult to intercept valid tokens for replay attacks - The expiry time of the JWT gives only a short window of opportunity where it could be replayed This has been patched in version v1.4.0+oryOS.17"}], "metrics": [{"cvssV3_1": {"attackComplexity": "HIGH", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 5.8, "baseSeverity": "MEDIUM", "confidentialityImpact": "HIGH", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "CHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:H/I:N/A:N", "version": "3.1"}}], "problemTypes": [{"descriptions": [{"cweId": "CWE-294", "description": "CWE-294: Authentication Bypass by Capture-replay", "lang": "en", "type": "CWE"}]}], "providerMetadata": {"dateUpdated": "2020-04-06T16:30:14", "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M"}, "references": [{"tags": ["x_refsource_CONFIRM"], "url": "https://github.com/ory/hydra/security/advisories/GHSA-3p3g-vpw6-4w66"}, {"tags": ["x_refsource_MISC"], "url": "https://github.com/ory/hydra/commit/700d17d3b7d507de1b1d459a7261d6fb2571ebe3"}, {"tags": ["x_refsource_MISC"], "url": "https://github.com/ory/hydra/releases/tag/v1.4.0"}], "source": {"advisory": "GHSA-3p3g-vpw6-4w66", "discovery": "UNKNOWN"}, "title": "Disallow replay of `private_key_jwt` by blacklisting JTIs in Hydra", "x_legacyV4Record": {"CVE_data_meta": {"ASSIGNER": "security-advisories@github.com", "ID": "CVE-2020-5300", "STATE": "PUBLIC", "TITLE": "Disallow replay of `private_key_jwt` by blacklisting JTIs in Hydra"}, "affects": {"vendor": {"vendor_data": [{"product": {"product_data": [{"product_name": "hydra", "version": {"version_data": [{"version_value": "< 1.4.0+oryOS.17"}]}}]}, "vendor_name": "ory"}]}}, "data_format": "MITRE", "data_type": "CVE", "data_version": "4.0", "description": {"description_data": [{"lang": "eng", "value": "In Hydra (an OAuth2 Server and OpenID Certified\u2122 OpenID Connect Provider written in Go), before version 1.4.0+oryOS.17, when using client authentication method 'private_key_jwt' [1], OpenId specification says the following about assertion `jti`: \"A unique identifier for the token, which can be used to prevent reuse of the token. 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