CVE-2018-19791

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{"affected": [{"affectedData": [{"product": "n/a", "vendor": "n/a", "versions": [{"status": "affected", "version": "n/a"}]}], "source": "cve@mitre.org"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:litespeedtech:openlitespeed:*:*:*:*:*:*:*:*", "matchCriteriaId": "516D6E56-E2B0-448E-BEBF-1007DD2F9F96", "versionEndExcluding": "1.5.0", "vulnerable": true}, {"criteria": "cpe:2.3:a:litespeedtech:openlitespeed:1.5.0:-:*:*:*:*:*:*", "matchCriteriaId": "0D166A0A-E47E-4CB9-9802-9E0DF0295523", "vulnerable": true}, {"criteria": "cpe:2.3:a:litespeedtech:openlitespeed:1.5.0:rc1:*:*:*:*:*:*", "matchCriteriaId": "4F83049D-873B-4597-95AB-A2EB527D3038", "vulnerable": true}, {"criteria": "cpe:2.3:a:litespeedtech:openlitespeed:1.5.0:rc2:*:*:*:*:*:*", "matchCriteriaId": "91824E53-FCC7-4DCD-A4EE-FA9A08415842", "vulnerable": true}, {"criteria": "cpe:2.3:a:litespeedtech:openlitespeed:1.5.0:rc3:*:*:*:*:*:*", "matchCriteriaId": "AB251670-E1F5-43F7-9932-3EC7515CEF33", "vulnerable": true}, {"criteria": "cpe:2.3:a:litespeedtech:openlitespeed:1.5.0:rc4:*:*:*:*:*:*", "matchCriteriaId": "EB7D62CF-192B-479E-AADB-48B4705EA092", "vulnerable": true}, {"criteria": "cpe:2.3:a:litespeedtech:openlitespeed:1.5.0:rc5:*:*:*:*:*:*", "matchCriteriaId": "69DA7BFE-EB1A-42D1-AC45-A39045BB5A60", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "The server in LiteSpeed OpenLiteSpeed before 1.5.0 RC6 does not correctly handle requests for byte sequences, allowing an attacker to amplify the response size by requesting the entire response body repeatedly, as demonstrated by an HTTP Range header value beginning with the \"bytes=0-,0-\" substring."}, {"lang": "es", "value": "El servidor en LiteSpeed OpenLiteSpeed en versiones anteriores a la 1.5.0 RC6 no manipula correctamente las peticiones para secuencias de bytes, permitiendo a un atacante que ampl\u00ede el tama\u00f1o de la respuesta al solicitar el cuerpo completo de la respuesta de manera repetida, tal y como queda demostrado con con un valor de cabecera HTTP Range que empieza por la subcadena \"bytes=0-,0-\"."}], "id": "CVE-2018-19791", "lastModified": "2026-06-17T01:49:53.447", "metrics": {"cvssMetricV2": [{"acInsufInfo": false, "baseSeverity": "MEDIUM", "cvssData": {"accessComplexity": "LOW", "accessVector": "NETWORK", "authentication": "SINGLE", "availabilityImpact": "PARTIAL", "baseScore": 4.0, "confidentialityImpact": "NONE", "integrityImpact": "NONE", "vectorString": "AV:N/AC:L/Au:S/C:N/I:N/A:P", "version": "2.0"}, "exploitabilityScore": 8.0, "impactScore": 2.9, "obtainAllPrivilege": false, "obtainOtherPrivilege": false, "obtainUserPrivilege": false, "source": "nvd@nist.gov", "type": "Primary", "userInteractionRequired": false}], "cvssMetricV30": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 6.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "version": "3.0"}, "exploitabilityScore": 2.8, "impactScore": 3.6, "source": "nvd@nist.gov", "type": "Primary"}]}, "published": "2018-12-03T06:29:00.400", "references": [{"source": "cve@mitre.org", "tags": ["Exploit", "Third Party Advisory"], "url": "https://github.com/litespeedtech/openlitespeed/issues/117"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Exploit", "Third Party Advisory"], "url": "https://github.com/litespeedtech/openlitespeed/issues/117"}], "sourceIdentifier": "cve@mitre.org", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-20"}], "source": "nvd@nist.gov", "type": "Primary"}]}

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