Medium
Security advisory
In Apache HTTP server versions 2.4.37 and prior, by sending request bodies in a slow loris way to plain resources, the h2 stream for that request unnecessarily occupied a server thread cleaning up that incoming data. This affects only HTTP/2 (mod_http2) connections.
- Products
- Not specified
- Affected versions
- Not specified
- Fixed versions
- Not specified
- CVEs
- CVE-2018-17189
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 1 Nov 2026, 05:28 UTC · Revision 1
Source evidence
In Apache HTTP server versions 2.4.37 and prior, by sending request bodies in a slow loris way to plain resources, the h2 stream for that request unnecessarily occupied a server thread cleaning up that incoming data. This affects only HTTP/2 (mod_http2) connections.
osv:CVE-2018-17189
Complete source record
{
"id": "768b11e56e337842c349f5dbd15abf61f1eaa885bd12783505a58ecc3a667141",
"url": "https://osv.dev/vulnerability/CVE-2018-17189",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "CVE-2018-17189",
"summary": "In Apache HTTP server versions 2.4.37 and prior, by sending request bodies in a slow loris way to plain resources, the h2 stream for that request unnecessarily occupied a server thread cleaning up that incoming data. This affects only HTTP/2 (mod_http2) connections.",
"evidence": "osv:CVE-2018-17189",
"products": [],
"severity": "medium",
"structured": {
"id": "CVE-2018-17189",
"aliases": [
"CVE-2018-17189"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L"
}
],
"affected": [
{
"ranges": [
{
"repo": "https://github.com/apache/httpd",
"type": "GIT",
"events": [
{
"introduced": "47a9d8e8abf5697b4580c3ee2ade302b5c058fa6"
},
{
"last_affected": "6431bbb0da47dd984110dc32728a84e5cc990313"
}
],
"database_specific": {
"extracted_events": [
{
"cpe": "cpe:2.3:a:apache:http_server:2.4.17:*:*:*:*:*:*:*",
"range": [
{
"introduced": "2.4.17"
},
{
"last_affected": "2.4.17"
}
],
"source": "CPE_STRING"
},
{
"cpe": "cpe:2.3:a:apache:http_server:2.4.18:*:*:*:*:*:*:*",
"range": [
{
"introduced": "2.4.18"
},
{
"last_affected": "2.4.18"
}
],
"source": "CPE_STRING"
},
{
"cpe": "cpe:2.3:a:apache:http_server:2.4.20:*:*:*:*:*:*:*",
"range": [
{
"introduced": "2.4.20"
},
{
"last_affected": "2.4.20"
}
],
"source": "CPE_STRING"
},
{
"cpe": "cpe:2.3:a:apache:http_server:2.4.23:*:*:*:*:*:*:*",
"range": [
{
"introduced": "2.4.23"
},
{
"last_affected": "2.4.23"
}
],
"source": "CPE_STRING"
},
{
"cpe": "cpe:2.3:a:apache:http_server:2.4.25:*:*:*:*:*:*:*",
"range": [
{
"introduced": "2.4.25"
},
{
"last_affected": "2.4.25"
}
],
"source": "CPE_STRING"
},
{
"cpe": "cpe:2.3:a:apache:http_server:2.4.26:*:*:*:*:*:*:*",
"range": [
{
"introduced": "2.4.26"
},
{
"last_affected": "2.4.26"
}
],
"source": "CPE_STRING"
},
{
"cpe": "cpe:2.3:a:apache:http_server:2.4.27:*:*:*:*:*:*:*",
"range": [
{
"introduced": "2.4.27"
},
{
"last_affected": "2.4.27"
}
],
"source": "CPE_STRING"
},
{
"cpe": "cpe:2.3:a:apache:http_server:2.4.28:*:*:*:*:*:*:*",
"range": [
{
"introduced": "2.4.28"
},
{
"last_affected": "2.4.28"
}
],
"source": "CPE_STRING"
},
{
"cpe": "cpe:2.3:a:apache:http_server:2.4.29:*:*:*:*:*:*:*",
"range": [
{
"introduced": "2.4.29"
},
{
"last_affected": "2.4.29"
}
],
"source": "CPE_STRING"
},
{
"cpe": "cpe:2.3:a:apache:http_server:2.4.30:*:*:*:*:*:*:*",
"range": [
{
"introduced": "2.4.30"
},
{
"last_affected": "2.4.30"
}
],
"source": "CPE_STRING"
},
{
"cpe": "cpe:2.3:a:apache:http_server:2.4.33:*:*:*:*:*:*:*",
"range": [
{
"introduced": "2.4.33"
},
{
"last_affected": "2.4.33"
}
],
"source": "CPE_STRING"
},
{
"cpe": "cpe:2.3:a:apache:http_server:2.4.34:*:*:*:*:*:*:*",
"range": [
{
"introduced": "2.4.34"
},
{
"last_affected": "2.4.34"
}
],
"source": "CPE_STRING"
},
{
"cpe": "cpe:2.3:a:apache:http_server:2.4.35:*:*:*:*:*:*:*",
"range": [
{
"introduced": "2.4.35"
},
{
"last_affected": "2.4.35"
}
],
"source": "CPE_STRING"
},
{
"cpe": "cpe:2.3:a:apache:http_server:2.4.37:*:*:*:*:*:*:*",
"range": [
{
"introduced": "2.4.37"
},
{
"last_affected": "2.4.37"
}
],
"source": "CPE_STRING"
}
]
}
}
],
"versions": [
"2.4.17",
"2.4.18",
"2.4.20",
"2.4.23",
"2.4.25",
"2.4.26",
"2.4.27",
"2.4.28",
"2.4.29",
"2.4.30",
"2.4.33",
"2.4.34",
"2.4.35",
"2.4.37"
],
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2018-17189.json"
}
}
],
"modified": "2026-10-24T10:30:29.289713240Z",
"provider": "osv",
"references": [
"https://lists.apache.org/thread.html/56c2e7cc9deb1c12a843d0dc251ea7fd3e7e80293cde02fcd65286ba%40%3Ccvs.httpd.apache.org%3E",
"https://lists.apache.org/thread.html/84a3714f0878781f6ed84473d1a503d2cc382277e100450209231830%40%3Ccvs.httpd.apache.org%3E",
"https://lists.apache.org/thread.html/r06f0d87ebb6d59ed8379633f36f72f5b1f79cadfda72ede0830b42cf%40%3Ccvs.httpd.apache.org%3E",
"https://lists.apache.org/thread.html/r15f9aa4427581a1aecb4063f1b4b983511ae1c9935e2a0a6876dad3c%40%3Ccvs.httpd.apache.org%3E",
"https://lists.apache.org/thread.html/r76142b8c5119df2178be7c2dba88fde552eedeec37ea993dfce68d1d%40%3Ccvs.httpd.apache.org%3E",
"https://lists.apache.org/thread.html/r9f93cf6dde308d42a9c807784e8102600d0397f5f834890708bf6920%40%3Ccvs.httpd.apache.org%3E",
"https://lists.apache.org/thread.html/rc998b18880df98bafaade071346690c2bc1444adaa1a1ea464b93f0a%40%3Ccvs.httpd.apache.org%3E",
"https://lists.apache.org/thread.html/rd18c3c43602e66f9cdcf09f1de233804975b9572b0456cc582390b6f%40%3Ccvs.httpd.apache.org%3E",
"https://lists.apache.org/thread.html/rd2fb621142e7fa187cfe12d7137bf66e7234abcbbcd800074c84a538%40%3Ccvs.httpd.apache.org%3E",
"https://lists.apache.org/thread.html/re3d27b6250aa8548b8845d314bb8a350b3df326cacbbfdfe4d455234%40%3Ccvs.httpd.apache.org%3E",
"https://lists.apache.org/thread.html/re473305a65b4db888e3556e4dae10c2a04ee89dcff2e26ecdbd860a9%40%3Ccvs.httpd.apache.org%3E",
"https://lists.apache.org/thread.html/rf6449464fd8b7437704c55f88361b66f12d5b5f90bcce66af4be4ba9%40%3Ccvs.httpd.apache.org%3E",
"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/IY7SJQOO3PYFVINZW6H5EK4EZ3HSGZNM/",
"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/U7N3DUEBFVGQWQEME5HTPTTKDHGHBAC6/",
"https://access.redhat.com/errata/RHSA-2019:3932",
"https://access.redhat.com/errata/RHSA-2019:3933",
"https://access.redhat.com/errata/RHSA-2019:3935",
"https://access.redhat.com/errata/RHSA-2019:4126",
"https://httpd.apache.org/security/vulnerabilities_24.html",
"https://security.gentoo.org/glsa/201903-21",
"https://security.netapp.com/advisory/ntap-20190125-0001/",
"https://support.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbux03950en_us",
"https://usn.ubuntu.com/3937-1/",
"https://www.debian.org/security/2019/dsa-4422",
"https://www.oracle.com/security-alerts/cpujan2020.html",
"https://www.oracle.com/technetwork/security-advisory/cpuapr2019-5072813.html",
"https://www.oracle.com/technetwork/security-advisory/cpujul2019-5072835.html",
"https://www.tenable.com/security/tns-2019-09",
"https://seclists.org/bugtraq/2019/Apr/5"
],
"provider_metadata": {
"unresolved_ranges": [
{
"cpes": [
"cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:esm:*:*:*",
"cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:esm:*:*:*",
"cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:*",
"cpe:2.3:o:canonical:ubuntu_linux:18.10:*:*:*:*:*:*:*"
],
"vendor_product": "canonical:ubuntu_linux",
"extracted_events": [
{
"range": [
{
"introduced": "14.04"
},
{
"last_affected": "14.04"
},
{
"introduced": "16.04"
},
{
"last_affected": "16.04"
},
{
"introduced": "18.04"
},
{
"last_affected": "18.04"
},
{
"introduced": "18.10"
},
{
"last_affected": "18.10"
}
],
"source": "CPE_STRING"
}
]
},
{
"cpes": [
"cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*"
],
"vendor_product": "debian:debian_linux",
"extracted_events": [
{
"range": [
{
"introduced": "9.0"
},
{
"last_affected": "9.0"
}
],
"source": "CPE_STRING"
}
]
},
{
"cpes": [
"cpe:2.3:o:fedoraproject:fedora:28:*:*:*:*:*:*:*",
"cpe:2.3:o:fedoraproject:fedora:29:*:*:*:*:*:*:*"
],
"vendor_product": "fedoraproject:fedora",
"extracted_events": [
{
"range": [
{
"introduced": "28"
},
{
"last_affected": "28"
},
{
"introduced": "29"
},
{
"last_affected": "29"
}
],
"source": "CPE_STRING"
}
]
},
{
"cpes": [
"cpe:2.3:a:oracle:enterprise_manager_ops_center:12.3.3:*:*:*:*:*:*:*"
],
"vendor_product": "oracle:enterprise_manager_ops_center",
"extracted_events": [
{
"range": [
{
"introduced": "12.3.3"
},
{
"last_affected": "12.3.3"
}
],
"source": "CPE_STRING"
}
]
},
{
"cpes": [
"cpe:2.3:a:oracle:hospitality_guest_access:4.2.0:*:*:*:*:*:*:*",
"cpe:2.3:a:oracle:hospitality_guest_access:4.2.1:*:*:*:*:*:*:*"
],
"vendor_product": "oracle:hospitality_guest_access",
"extracted_events": [
{
"range": [
{
"introduced": "4.2.0"
},
{
"last_affected": "4.2.0"
},
{
"introduced": "4.2.1"
},
{
"last_affected": "4.2.1"
}
],
"source": "CPE_STRING"
}
]
},
{
"cpes": [
"cpe:2.3:a:oracle:instantis_enterprisetrack:17.1:*:*:*:*:*:*:*",
"cpe:2.3:a:oracle:instantis_enterprisetrack:17.2:*:*:*:*:*:*:*",
"cpe:2.3:a:oracle:instantis_enterprisetrack:17.3:*:*:*:*:*:*:*"
],
"vendor_product": "oracle:instantis_enterprisetrack",
"extracted_events": [
{
"range": [
{
"introduced": "17.1"
},
{
"last_affected": "17.1"
},
{
"introduced": "17.2"
},
{
"last_affected": "17.2"
},
{
"introduced": "17.3"
},
{
"last_affected": "17.3"
}
],
"source": "CPE_STRING"
}
]
},
{
"cpes": [
"cpe:2.3:a:oracle:retail_xstore_point_of_service:7.0:*:*:*:*:*:*:*",
"cpe:2.3:a:oracle:retail_xstore_point_of_service:7.1:*:*:*:*:*:*:*"
],
"vendor_product": "oracle:retail_xstore_point_of_service",
"extracted_events": [
{
"range": [
{
"introduced": "7.0"
},
{
"last_affected": "7.0"
},
{
"introduced": "7.1"
},
{
"last_affected": "7.1"
}
],
"source": "CPE_STRING"
}
]
},
{
"cpes": [
"cpe:2.3:a:oracle:sun_zfs_storage_appliance_kit:8.8.6:*:*:*:*:*:*:*"
],
"vendor_product": "oracle:sun_zfs_storage_appliance_kit",
"extracted_events": [
{
"range": [
{
"introduced": "8.8.6"
},
{
"last_affected": "8.8.6"
}
],
"source": "CPE_STRING"
}
]
},
{
"cpes": [
"cpe:2.3:a:redhat:jboss_core_services:1.0:*:*:*:*:*:*:*"
],
"vendor_product": "redhat:jboss_core_services",
"extracted_events": [
{
"range": [
{
"introduced": "1.0"
},
{
"last_affected": "1.0"
}
],
"source": "CPE_STRING"
}
]
}
]
}
},
"related_cves": [
{
"value": "CVE-2018-17189",
"evidence": "/id"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 432286,
"published_at": "2019-01-30T22:29:00.357+00:00"
}