Critical
Security advisory
In Apache httpd 2.2.0 to 2.4.29, when generating an HTTP Digest authentication challenge, the nonce sent to prevent reply attacks was not correctly generated using a pseudo-random seed. In a cluster of servers using a common Digest authentication configuration, HTTP requests could be replayed across servers by an attacker without detection.
- Products
- Not specified
- Affected versions
- Not specified
- Fixed versions
- Not specified
- CVEs
- CVE-2018-1312
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 1 Nov 2026, 07:15 UTC · Revision 1
Source evidence
In Apache httpd 2.2.0 to 2.4.29, when generating an HTTP Digest authentication challenge, the nonce sent to prevent reply attacks was not correctly generated using a pseudo-random seed. In a cluster of servers using a common Digest authentication configuration, HTTP requests could be replayed across servers by an attacker without detection.
osv:CVE-2018-1312
Complete source record
{
"id": "e198ddad5b57557e523da5aa40296925c94b0d9a0492e07fabf1f7e4bce414d7",
"url": "https://osv.dev/vulnerability/CVE-2018-1312",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "CVE-2018-1312",
"summary": "In Apache httpd 2.2.0 to 2.4.29, when generating an HTTP Digest authentication challenge, the nonce sent to prevent reply attacks was not correctly generated using a pseudo-random seed. In a cluster of servers using a common Digest authentication configuration, HTTP requests could be replayed across servers by an attacker without detection.",
"evidence": "osv:CVE-2018-1312",
"products": [],
"severity": "critical",
"structured": {
"id": "CVE-2018-1312",
"aliases": [
"CVE-2018-1312"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"
}
],
"affected": [
{
"ranges": [
{
"repo": "https://github.com/apache/httpd",
"type": "GIT",
"events": [
{
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},
{
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}
],
"database_specific": {
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{
"cpe": "cpe:2.3:a:apache:http_server:2.4.1:*:*:*:*:*:*:*",
"range": [
{
"introduced": "2.4.1"
},
{
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}
],
"source": "CPE_STRING"
},
{
"cpe": "cpe:2.3:a:apache:http_server:2.4.2:*:*:*:*:*:*:*",
"range": [
{
"introduced": "2.4.2"
},
{
"last_affected": "2.4.2"
}
],
"source": "CPE_STRING"
},
{
"cpe": "cpe:2.3:a:apache:http_server:2.4.3:*:*:*:*:*:*:*",
"range": [
{
"introduced": "2.4.3"
},
{
"last_affected": "2.4.3"
}
],
"source": "CPE_STRING"
},
{
"cpe": "cpe:2.3:a:apache:http_server:2.4.4:*:*:*:*:*:*:*",
"range": [
{
"introduced": "2.4.4"
},
{
"last_affected": "2.4.4"
}
],
"source": "CPE_STRING"
},
{
"cpe": "cpe:2.3:a:apache:http_server:2.4.6:*:*:*:*:*:*:*",
"range": [
{
"introduced": "2.4.6"
},
{
"last_affected": "2.4.6"
}
],
"source": "CPE_STRING"
},
{
"cpe": "cpe:2.3:a:apache:http_server:2.4.7:*:*:*:*:*:*:*",
"range": [
{
"introduced": "2.4.7"
},
{
"last_affected": "2.4.7"
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],
"source": "CPE_STRING"
},
{
"cpe": "cpe:2.3:a:apache:http_server:2.4.9:*:*:*:*:*:*:*",
"range": [
{
"introduced": "2.4.9"
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{
"last_affected": "2.4.9"
}
],
"source": "CPE_STRING"
},
{
"cpe": "cpe:2.3:a:apache:http_server:2.4.10:*:*:*:*:*:*:*",
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{
"introduced": "2.4.10"
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{
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}
],
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},
{
"cpe": "cpe:2.3:a:apache:http_server:2.4.12:*:*:*:*:*:*:*",
"range": [
{
"introduced": "2.4.12"
},
{
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}
],
"source": "CPE_STRING"
},
{
"cpe": "cpe:2.3:a:apache:http_server:2.4.16:*:*:*:*:*:*:*",
"range": [
{
"introduced": "2.4.16"
},
{
"last_affected": "2.4.16"
}
],
"source": "CPE_STRING"
},
{
"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"
}
],
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},
{
"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"
}
]
}
}
],
"versions": [
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"2.4.10",
"2.4.12",
"2.4.16",
"2.4.17",
"2.4.18",
"2.4.2",
"2.4.20",
"2.4.23",
"2.4.25",
"2.4.26",
"2.4.27",
"2.4.28",
"2.4.29",
"2.4.3",
"2.4.4",
"2.4.6",
"2.4.7",
"2.4.9"
],
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2018-1312.json"
}
}
],
"modified": "2026-10-24T10:30:50.690020623Z",
"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/rd336919f655b7ff309385e34a143e41c503e133da80414485b3abcc9%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.apache.org/thread.html/rfcf929bd33a6833e3f0c35eebdad70d5060665f9c4e17ea467c66770%40%3Ccvs.httpd.apache.org%3E",
"https://access.redhat.com/errata/RHSA-2018:3558",
"https://access.redhat.com/errata/RHSA-2019:0366",
"https://access.redhat.com/errata/RHSA-2019:0367",
"https://access.redhat.com/errata/RHSA-2019:1898",
"https://httpd.apache.org/security/vulnerabilities_24.html",
"https://lists.debian.org/debian-lts-announce/2018/05/msg00020.html",
"https://security.netapp.com/advisory/ntap-20180601-0004/",
"https://support.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbux03909en_us",
"https://usn.ubuntu.com/3627-1/",
"https://usn.ubuntu.com/3627-2/",
"https://usn.ubuntu.com/3937-2/",
"https://www.debian.org/security/2018/dsa-4164",
"https://www.tenable.com/security/tns-2019-09"
],
"provider_metadata": {
"unresolved_ranges": [
{
"cpes": [
"cpe:2.3:o:canonical:ubuntu_linux:12.04:*:*:*:-:*:*:*",
"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:17.10:*:*:*:*:*:*:*",
"cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:*"
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{
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],
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{
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{
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{
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]
},
{
"cpes": [
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],
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{
"range": [
{
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{
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}
],
"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"
},
{
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}
],
"source": "CPE_STRING"
}
]
}
]
}
},
"related_cves": [
{
"value": "CVE-2018-1312",
"evidence": "/id"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 437307,
"published_at": "2018-03-26T15:29:00.587+00:00"
}