{"api_version":"1","generated_at":"2026-07-23T07:11:29+00:00","cve":"CVE-2018-6335","urls":{"html":"https://cve.report/CVE-2018-6335","api":"https://cve.report/api/cve/CVE-2018-6335.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2018-6335","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2018-6335"},"summary":{"title":"CVE-2018-6335","description":"A Malformed h2 frame can cause 'std::out_of_range' exception when parsing priority meta data. This behavior can lead to denial-of-service. This affects all supported versions of HHVM (3.25.2, 3.24.6, and 3.21.10 and below) when using the proxygen server to handle HTTP2 requests.","state":"PUBLIC","assigner":"cve-assign@fb.com","published_at":"2018-12-31 19:29:00","updated_at":"2019-10-09 23:41:00"},"problem_types":["CWE-20"],"metrics":[],"references":[{"url":"https://github.com/facebook/hhvm/commit/4cb57dd753a339654ca464c139db9871fe961d56","name":"https://github.com/facebook/hhvm/commit/4cb57dd753a339654ca464c139db9871fe961d56","refsource":"MISC","tags":["Patch","Third Party Advisory"],"title":"[security][CVE-2018-6335] Fix potential crash in HTTP2 padding handling · facebook/hhvm@4cb57dd · GitHub","mime":"text/html","httpstatus":"200","archivestatus":"0"},{"url":"https://hhvm.com/blog/2018/05/04/hhvm-3.25.3.html","name":"https://hhvm.com/blog/2018/05/04/hhvm-3.25.3.html","refsource":"MISC","tags":["Vendor Advisory"],"title":"HHVM 3.25.3, HHVM 3.24.7, and 3.21.11 | HHVM","mime":"text/html","httpstatus":"200","archivestatus":"200"},{"url":"https://www.cve.org/CVERecord?id=CVE-2018-6335","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2018-6335","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[{"cve_year":"2018","cve_id":"6335","vulnerable":"1","versionEndIncluding":"","cpe1":"cpe","cpe2":"2.3","cpe3":"a","cpe4":"facebook","cpe5":"hhvm","cpe6":"3.24.6","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"},{"cve_year":"2018","cve_id":"6335","vulnerable":"1","versionEndIncluding":"","cpe1":"cpe","cpe2":"2.3","cpe3":"a","cpe4":"facebook","cpe5":"hhvm","cpe6":"3.25.2","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"},{"cve_year":"2018","cve_id":"6335","vulnerable":"1","versionEndIncluding":"1","cpe1":"cpe","cpe2":"2.3","cpe3":"a","cpe4":"facebook","cpe5":"hhvm","cpe6":"3.24.6","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"},{"cve_year":"2018","cve_id":"6335","vulnerable":"1","versionEndIncluding":"1","cpe1":"cpe","cpe2":"2.3","cpe3":"a","cpe4":"facebook","cpe5":"hhvm","cpe6":"3.25.2","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"},{"cve_year":"2018","cve_id":"6335","vulnerable":"1","versionEndIncluding":"3.21.10","cpe1":"cpe","cpe2":"2.3","cpe3":"a","cpe4":"facebook","cpe5":"hhvm","cpe6":"*","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"}],"vendor_comments":[],"enrichments":{"kev":null,"epss":null,"legacy_qids":[]},"source_records":{"cve_program":{"CVE_data_meta":{"ASSIGNER":"cve-assign@fb.com","DATE_ASSIGNED":"2018-04-13","ID":"CVE-2018-6335","STATE":"PUBLIC"},"affects":{"vendor":{"vendor_data":[{"product":{"product_data":[{"product_name":"HHVM","version":{"version_data":[{"version_affected":"!=>","version_value":"3.25.3"},{"version_affected":"=>","version_value":"3.25.0"},{"version_affected":"!=>","version_value":"3.24.7"},{"version_affected":"=>","version_value":"3.22.0"},{"version_affected":"!=>","version_value":"3.21.11"},{"version_affected":"<","version_value":"3.21.11"}]}}]},"vendor_name":"Facebook"}]}},"data_format":"MITRE","data_type":"CVE","data_version":"4.0","description":{"description_data":[{"lang":"eng","value":"A Malformed h2 frame can cause 'std::out_of_range' exception when parsing priority meta data. This behavior can lead to denial-of-service. This affects all supported versions of HHVM (3.25.2, 3.24.6, and 3.21.10 and below) when using the proxygen server to handle HTTP2 requests."}]},"problemtype":{"problemtype_data":[{"description":[{"lang":"eng","value":"Denial of Service (CWE-400)"}]}]},"references":{"reference_data":[{"name":"https://hhvm.com/blog/2018/05/04/hhvm-3.25.3.html","refsource":"MISC","url":"https://hhvm.com/blog/2018/05/04/hhvm-3.25.3.html"},{"name":"https://github.com/facebook/hhvm/commit/4cb57dd753a339654ca464c139db9871fe961d56","refsource":"MISC","url":"https://github.com/facebook/hhvm/commit/4cb57dd753a339654ca464c139db9871fe961d56"}]}},"nvd":{"publishedDate":"2018-12-31 19:29:00","lastModifiedDate":"2019-10-09 23:41:00","problem_types":["CWE-20"],"metrics":{"baseMetricV3":{"cvssV3":{"version":"3.0","vectorString":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"NONE","availabilityImpact":"HIGH","baseScore":7.5,"baseSeverity":"HIGH"},"exploitabilityScore":3.9,"impactScore":3.6},"baseMetricV2":{"cvssV2":{"version":"2.0","vectorString":"AV:N/AC:L/Au:N/C:N/I:N/A:P","accessVector":"NETWORK","accessComplexity":"LOW","authentication":"NONE","confidentialityImpact":"NONE","integrityImpact":"NONE","availabilityImpact":"PARTIAL","baseScore":5},"severity":"MEDIUM","exploitabilityScore":10,"impactScore":2.9,"acInsufInfo":false,"obtainAllPrivilege":false,"obtainUserPrivilege":false,"obtainOtherPrivilege":false,"userInteractionRequired":false}},"configurations":{"CVE_data_version":"4.0","nodes":[{"operator":"OR","children":[],"cpe_match":[{"vulnerable":true,"cpe23Uri":"cpe:2.3:a:facebook:hhvm:*:*:*:*:*:*:*:*","versionEndIncluding":"3.21.10","cpe_name":[]},{"vulnerable":true,"cpe23Uri":"cpe:2.3:a:facebook:hhvm:3.24.6:*:*:*:*:*:*:*","cpe_name":[]},{"vulnerable":true,"cpe23Uri":"cpe:2.3:a:facebook:hhvm:3.25.2:*:*:*:*:*:*:*","cpe_name":[]}]}]}},"legacy_mitre":{"record":{"CveYear":"2018","CveId":"6335","Ordinal":"122398","Title":"CVE-2018-6335","CVE":"CVE-2018-6335","Year":"2018"},"notes":[{"CveYear":"2018","CveId":"6335","Ordinal":"1","NoteData":"A Malformed h2 frame can cause 'std::out_of_range' exception when parsing priority meta data. This behavior can lead to denial-of-service. This affects all supported versions of HHVM (3.25.2, 3.24.6, and 3.21.10 and below) when using the proxygen server to handle HTTP2 requests.","Type":"Description","Title":null},{"CveYear":"2018","CveId":"6335","Ordinal":"2","NoteData":"2018-12-31","Type":"Other","Title":"Published"},{"CveYear":"2018","CveId":"6335","Ordinal":"3","NoteData":"2018-12-31","Type":"Other","Title":"Modified"}]}}}