CVE-2018-11763 (GCVE-0-2018-11763)
Vulnerability from cvelistv5 – Published: 2018-09-25 21:00 – Updated: 2024-09-17 02:21
VLAI?
Summary
In Apache HTTP Server 2.4.17 to 2.4.34, by sending continuous, large SETTINGS frames a client can occupy a connection, server thread and CPU time without any connection timeout coming to effect. This affects only HTTP/2 connections. A possible mitigation is to not enable the h2 protocol.
Severity ?
No CVSS data available.
CWE
- mod_http2, DoS via continuous SETTINGS frames
Assigner
References
26 references
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Apache Software Foundation | Apache HTTP Server |
Affected:
2.4.17 to 2.4.34
|
Date Public ?
2018-09-25 00:00
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"assignerOrgId": "f0158376-9dc2-43b6-827c-5f631a4d8d09",
"assignerShortName": "apache",
"cveId": "CVE-2018-11763",
"datePublished": "2018-09-25T21:00:00.000Z",
"dateReserved": "2018-06-05T00:00:00.000Z",
"dateUpdated": "2024-09-17T02:21:55.083Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.1",
"vulnerability-lookup:meta": {
"epss": {
"cve": "CVE-2018-11763",
"date": "2026-05-20",
"epss": "0.22356",
"percentile": "0.95897"
},
"fkie_nvd": {
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"descriptions": "[{\"lang\": \"en\", \"value\": \"In Apache HTTP Server 2.4.17 to 2.4.34, by sending continuous, large SETTINGS frames a client can occupy a connection, server thread and CPU time without any connection timeout coming to effect. This affects only HTTP/2 connections. A possible mitigation is to not enable the h2 protocol.\"}, {\"lang\": \"es\", \"value\": \"En Apache HTTP Server, de la versi\\u00f3n 2.4.17 a la 2.4.34, mediante el env\\u00edo continuo de tramas SETTINGS grandes, un cliente puede ocupar una conexi\\u00f3n, hilo del servidor y tiempo de CPU sin que se active ning\\u00fan agotamiento del tiempo de conexi\\u00f3n. Esto solo afecta a las conexiones HTTP/2. Una posible mitigaci\\u00f3n es no activar el protocolo h2.\"}]",
"id": "CVE-2018-11763",
"lastModified": "2024-11-21T03:43:58.790",
"metrics": "{\"cvssMetricV30\": [{\"source\": \"nvd@nist.gov\", \"type\": \"Primary\", \"cvssData\": {\"version\": \"3.0\", \"vectorString\": \"CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H\", \"baseScore\": 5.9, \"baseSeverity\": \"MEDIUM\", \"attackVector\": \"NETWORK\", \"attackComplexity\": \"HIGH\", \"privilegesRequired\": \"NONE\", \"userInteraction\": \"NONE\", \"scope\": \"UNCHANGED\", \"confidentialityImpact\": \"NONE\", \"integrityImpact\": \"NONE\", \"availabilityImpact\": \"HIGH\"}, \"exploitabilityScore\": 2.2, \"impactScore\": 3.6}], \"cvssMetricV2\": [{\"source\": \"nvd@nist.gov\", \"type\": \"Primary\", \"cvssData\": {\"version\": \"2.0\", \"vectorString\": \"AV:N/AC:M/Au:N/C:N/I:N/A:P\", \"baseScore\": 4.3, \"accessVector\": \"NETWORK\", \"accessComplexity\": \"MEDIUM\", \"authentication\": \"NONE\", \"confidentialityImpact\": \"NONE\", \"integrityImpact\": \"NONE\", \"availabilityImpact\": \"PARTIAL\"}, \"baseSeverity\": \"MEDIUM\", \"exploitabilityScore\": 8.6, \"impactScore\": 2.9, \"acInsufInfo\": false, \"obtainAllPrivilege\": false, \"obtainUserPrivilege\": false, \"obtainOtherPrivilege\": false, \"userInteractionRequired\": false}]}",
"published": "2018-09-25T21:29:00.283",
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"sourceIdentifier": "security@apache.org",
"vulnStatus": "Modified",
"weaknesses": "[{\"source\": \"nvd@nist.gov\", \"type\": \"Primary\", \"description\": [{\"lang\": \"en\", \"value\": \"NVD-CWE-noinfo\"}]}]"
},
"nvd": "{\"cve\":{\"id\":\"CVE-2018-11763\",\"sourceIdentifier\":\"security@apache.org\",\"published\":\"2018-09-25T21:29:00.283\",\"lastModified\":\"2024-11-21T03:43:58.790\",\"vulnStatus\":\"Modified\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In Apache HTTP Server 2.4.17 to 2.4.34, by sending continuous, large SETTINGS frames a client can occupy a connection, server thread and CPU time without any connection timeout coming to effect. This affects only HTTP/2 connections. A possible mitigation is to not enable the h2 protocol.\"},{\"lang\":\"es\",\"value\":\"En Apache HTTP Server, de la versi\u00f3n 2.4.17 a la 2.4.34, mediante el env\u00edo continuo de tramas SETTINGS grandes, un cliente puede ocupar una conexi\u00f3n, hilo del servidor y tiempo de CPU sin que se active ning\u00fan agotamiento del tiempo de conexi\u00f3n. Esto solo afecta a las conexiones HTTP/2. Una posible mitigaci\u00f3n es no activar el protocolo h2.\"}],\"metrics\":{\"cvssMetricV30\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"3.0\",\"vectorString\":\"CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H\",\"baseScore\":5.9,\"baseSeverity\":\"MEDIUM\",\"attackVector\":\"NETWORK\",\"attackComplexity\":\"HIGH\",\"privilegesRequired\":\"NONE\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":2.2,\"impactScore\":3.6}],\"cvssMetricV2\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"2.0\",\"vectorString\":\"AV:N/AC:M/Au:N/C:N/I:N/A:P\",\"baseScore\":4.3,\"accessVector\":\"NETWORK\",\"accessComplexity\":\"MEDIUM\",\"authentication\":\"NONE\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"PARTIAL\"},\"baseSeverity\":\"MEDIUM\",\"exploitabilityScore\":8.6,\"impactScore\":2.9,\"acInsufInfo\":false,\"obtainAllPrivilege\":false,\"obtainUserPrivilege\":false,\"obtainOtherPrivilege\":false,\"userInteractionRequired\":false}]},\"weaknesses\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"NVD-CWE-noinfo\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:apache:http_server:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"2.4.17\",\"versionEndIncluding\":\"2.4.34\",\"matchCriteriaId\":\"5B01C8E1-1FD7-4114-823E-7220B705A031\"}]}]},{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:*\",\"matchCriteriaId\":\"23A7C53F-B80F-4E6A-AFA9-58EEA84BE11D\"}]}]},{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:redhat:enterprise_linux:6.0:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"2F6AB192-9D7D-4A9A-8995-E53A9DE9EAFC\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:redhat:enterprise_linux:7.0:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"142AD0DD-4CF3-4D74-9442-459CE3347E3A\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:redhat:enterprise_linux:7.4:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"041F9200-4C01-4187-AE34-240E8277B54D\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:redhat:enterprise_linux:7.5:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"4EB48767-F095-444F-9E05-D9AC345AB803\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:redhat:enterprise_linux:7.6:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"5F6FA12B-504C-4DBF-A32E-0548557AA2ED\"}]}]},{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:oracle:enterprise_manager_ops_center:12.3.3:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"AB654DFA-FEF9-4D00-ADB0-F3F2B6ACF13E\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:oracle:hospitality_guest_access:4.2.0:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"1A3DC116-2844-47A1-BEC2-D0675DD97148\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:oracle:hospitality_guest_access:4.2.1:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"E0F1DF3E-0F2D-4EFC-9A3E-F72149C8AE94\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:oracle:instantis_enterprisetrack:17.1:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"82EA4BA7-C38B-4AF3-8914-9E3D089EBDD4\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:oracle:instantis_enterprisetrack:17.2:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"B9C9BC66-FA5F-4774-9BDA-7AB88E2839C4\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:oracle:instantis_enterprisetrack:17.3:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"7F69B9A5-F21B-4904-9F27-95C0F7A628E3\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:oracle:retail_xstore_point_of_service:7.0:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"2F87FC90-16D0-4051-8280-B0DD4441F10B\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:oracle:retail_xstore_point_of_service:7.1:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"A0ED83E3-E6BF-4EAA-AF8F-33485A88A218\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:oracle:secure_global_desktop:5.4:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"B5265C91-FF5C-4451-A7C2-D388A65ACFA2\"}]}]},{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:netapp:storage_automation_store:-:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"7B7A6697-98CC-4E36-93DB-B7160F8399F9\"}]}]}],\"references\":[{\"url\":\"http://lists.opensuse.org/opensuse-security-announce/2019-06/msg00030.html\",\"source\":\"security@apache.org\"},{\"url\":\"http://lists.opensuse.org/opensuse-security-announce/2019-07/msg00056.html\",\"source\":\"security@apache.org\"},{\"url\":\"http://www.securityfocus.com/bid/105414\",\"source\":\"security@apache.org\",\"tags\":[\"Third 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}
}
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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