CVE-2024-45403

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{"affected": [{"affectedData": [{"product": "h2o", "vendor": "h2o", "versions": [{"status": "affected", "version": ">= 16b13eee8ad7895b4fe3fcbcabee53bd52782562, < 1ed32b23f999acf0c5029f09c8525f93eb1d354c"}]}], "source": "security-advisories@github.com"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:dena:h2o:*:*:*:*:*:*:*:*", "matchCriteriaId": "150B718B-AB9A-4FA0-AAFD-AB3E7CA96120", "versionEndExcluding": "2024-09-04", "versionStartIncluding": "2024-06-18", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "h2o is an HTTP server with support for HTTP/1.x, HTTP/2 and HTTP/3. When h2o is configured as a reverse proxy and HTTP/3 requests are cancelled by the client, h2o might crash due to an assertion failure. The crash can be exploited by an attacker to mount a Denial-of-Service attack. By default, the h2o standalone server automatically restarts, minimizing the impact. However, HTTP requests that were served concurrently will still be disrupted. The vulnerability has been addressed in commit 1ed32b2. Users may disable the use of HTTP/3 to mitigate the issue."}, {"lang": "es", "value": "h2o es un servidor HTTP compatible con HTTP/1.x, HTTP/2 y HTTP/3. Cuando h2o est\u00e1 configurado como un proxy inverso y el cliente cancela las solicitudes HTTP/3, h2o puede bloquearse debido a un error de aserci\u00f3n. Un atacante puede aprovechar el bloqueo para lanzar un ataque de denegaci\u00f3n de servicio. De forma predeterminada, el servidor independiente h2o se reinicia autom\u00e1ticamente, lo que minimiza el impacto. Sin embargo, las solicitudes HTTP que se atendieron simult\u00e1neamente seguir\u00e1n siendo interrumpidas. La vulnerabilidad se ha solucionado en el commit 1ed32b2. Los usuarios pueden desactivar el uso de HTTP/3 para mitigar el problema."}], "id": "CVE-2024-45403", "lastModified": "2026-06-17T07:54:08.843", "metrics": {"cvssMetricV31": [{"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"}, {"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"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2024-45403", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2024-10-11T14:40:44.124164Z", "version": "2.0.3"}}]}, "published": "2024-10-11T15:15:05.123", "references": [{"source": "security-advisories@github.com", "tags": ["Patch"], "url": "https://github.com/h2o/h2o/commit/16b13eee8ad7895b4fe3fcbcabee53bd52782562"}, {"source": "security-advisories@github.com", "tags": ["Patch"], "url": "https://github.com/h2o/h2o/commit/1ed32b23f999acf0c5029f09c8525f93eb1d354c"}, {"source": "security-advisories@github.com", "tags": ["Vendor Advisory"], "url": "https://github.com/h2o/h2o/security/advisories/GHSA-4xp5-3jhc-3m92"}, {"source": "security-advisories@github.com", "tags": ["Product"], "url": "https://h2o.examp1e.net/configure/http3_directives.html"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-617"}], "source": "security-advisories@github.com", "type": "Secondary"}]}

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