{"dataType": "CVE_RECORD", "dataVersion": "5.0", "cveMetadata": {"cveId": "CVE-2023-50247", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "state": "PUBLISHED", "assignerShortName": "GitHub_M", "dateReserved": "2023-12-05T20:42:59.377Z", "datePublished": "2023-12-12T19:56:20.726Z", "dateUpdated": "2023-12-12T19:56:20.726Z"}, "containers": {"cna": {"title": "h2o QUIC state exhaustion DoS", "problemTypes": [{"descriptions": [{"cweId": "CWE-770", "lang": "en", "description": "CWE-770: Allocation of Resources Without Limits or Throttling", "type": "CWE"}]}], "metrics": [{"cvssV3_1": {"attackComplexity": "HIGH", "attackVector": "NETWORK", "availabilityImpact": "LOW", "baseScore": 3.7, "baseSeverity": "LOW", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L", "version": "3.1"}}], "references": [{"name": "https://github.com/h2o/h2o/security/advisories/GHSA-2ch5-p59c-7mv6", "tags": ["x_refsource_CONFIRM"], "url": "https://github.com/h2o/h2o/security/advisories/GHSA-2ch5-p59c-7mv6"}, {"name": "https://github.com/h2o/h2o/commit/d67e81d03be12a9d53dc8271af6530f40164cd35", "tags": ["x_refsource_MISC"], "url": "https://github.com/h2o/h2o/commit/d67e81d03be12a9d53dc8271af6530f40164cd35"}], "affected": [{"vendor": "h2o", "product": "h2o", "versions": [{"version": "<= 2.3.0-beta2", "status": "affected"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2023-12-12T19:56:20.726Z"}, "descriptions": [{"lang": "en", "value": "h2o is an HTTP server with support for HTTP/1.x, HTTP/2 and HTTP/3. The QUIC stack (quicly), as used by H2O up to commit 43f86e5 (in version 2.3.0-beta and prior), is susceptible to a state exhaustion attack. When H2O is serving HTTP/3, a remote attacker can exploit this vulnerability to progressively increase the memory retained by the QUIC stack. This can eventually cause H2O to abort due to memory exhaustion. The vulnerability has been resolved in commit d67e81d03be12a9d53dc8271af6530f40164cd35. HTTP/1 and HTTP/2 are not affected by this vulnerability as they do not use QUIC. Administrators looking to mitigate this issue without upgrading can disable HTTP/3 support."}], "source": {"advisory": "GHSA-2ch5-p59c-7mv6", "discovery": "UNKNOWN"}}}}

{"configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:dena:h2o:*:*:*:*:*:*:*:*", "matchCriteriaId": "3C540EDB-1F68-47E9-A457-B6BC1EB805D7", "versionEndIncluding": "2.2.6", "vulnerable": true}, {"criteria": "cpe:2.3:a:dena:h2o:2.3.0:beta1:*:*:*:*:*:*", "matchCriteriaId": "128D1D5E-4E71-4ABB-B580-F17E2B74B5F3", "vulnerable": true}, {"criteria": "cpe:2.3:a:dena:h2o:2.3.0:beta2:*:*:*:*:*:*", "matchCriteriaId": "E69DE676-300A-4A95-A04D-7463CA372799", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "descriptions": [{"lang": "en", "value": "h2o is an HTTP server with support for HTTP/1.x, HTTP/2 and HTTP/3. The QUIC stack (quicly), as used by H2O up to commit 43f86e5 (in version 2.3.0-beta and prior), is susceptible to a state exhaustion attack. When H2O is serving HTTP/3, a remote attacker can exploit this vulnerability to progressively increase the memory retained by the QUIC stack. This can eventually cause H2O to abort due to memory exhaustion. The vulnerability has been resolved in commit d67e81d03be12a9d53dc8271af6530f40164cd35. HTTP/1 and HTTP/2 are not affected by this vulnerability as they do not use QUIC. Administrators looking to mitigate this issue without upgrading can disable HTTP/3 support."}, {"lang": "es", "value": "h2o es un servidor HTTP compatible con HTTP/1.x, HTTP/2 y HTTP/3. La pila QUIC (r\u00e1pidamente), tal como la utiliza H2O hasta el commit 43f86e5 (en la versi\u00f3n 2.3.0-beta y anteriores), es susceptible a un ataque de agotamiento de estado. Cuando H2O sirve HTTP/3, un atacante remoto puede aprovechar esta vulnerabilidad para aumentar progresivamente la memoria retenida por la pila QUIC. Esto eventualmente puede causar que H2O cancele debido al agotamiento de la memoria. La vulnerabilidad se resolvi\u00f3 en el commit d67e81d03be12a9d53dc8271af6530f40164cd35. HTTP/1 y HTTP/2 no se ven afectados por esta vulnerabilidad ya que no utilizan QUIC. Los administradores que quieran mitigar este problema sin realizar una actualizaci\u00f3n pueden desactivar la compatibilidad con HTTP/3."}], "id": "CVE-2023-50247", "lastModified": "2023-12-19T18:56:13.660", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 7.5, "baseSeverity": "HIGH", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 3.6, "source": "nvd@nist.gov", "type": "Primary"}, {"cvssData": {"attackComplexity": "HIGH", "attackVector": "NETWORK", "availabilityImpact": "LOW", "baseScore": 3.7, "baseSeverity": "LOW", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L", "version": "3.1"}, "exploitabilityScore": 2.2, "impactScore": 1.4, "source": "security-advisories@github.com", "type": "Secondary"}]}, "published": "2023-12-12T20:15:08.580", "references": [{"source": "security-advisories@github.com", "tags": ["Patch"], "url": "https://github.com/h2o/h2o/commit/d67e81d03be12a9d53dc8271af6530f40164cd35"}, {"source": "security-advisories@github.com", "tags": ["Patch", "Vendor Advisory"], "url": "https://github.com/h2o/h2o/security/advisories/GHSA-2ch5-p59c-7mv6"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-770"}], "source": "security-advisories@github.com", "type": "Primary"}]}

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