High
Security advisory
"deny-answer-aliases" is a little-used feature intended to help recursive server operators protect end users against DNS rebinding attacks, a potential method of circumventing the security model used by client browsers. However, a defect in this feature makes it easy, when the feature is in use, to experience an assertion failure in name.c. Affects BIND 9.7.0->9.8.8, 9.9.0->9.9.13, 9.10.0->9.10.8, 9.11.0->9.11.4, 9.12.0->9.12.2, 9.13.0->9.13.2.
- Products
- Not specified
- Affected versions
- Not specified
- Fixed versions
- Not specified
- CVEs
- CVE-2018-5740
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 1 Nov 2026, 04:49 UTC · Revision 1
Source evidence
"deny-answer-aliases" is a little-used feature intended to help recursive server operators protect end users against DNS rebinding attacks, a potential method of circumventing the security model used by client browsers. However, a defect in this feature makes it easy, when the feature is in use, to experience an assertion failure in name.c. Affects BIND 9.7.0->9.8.8, 9.9.0->9.9.13, 9.10.0->9.10.8, 9.11.0->9.11.4, 9.12.0->9.12.2, 9.13.0->9.13.2.
osv:CVE-2018-5740
Complete source record
{
"id": "27198d6b3f30639678f589f31749f4ef65a09efd2df51198a73414a06c906cef",
"url": "https://osv.dev/vulnerability/CVE-2018-5740",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "CVE-2018-5740",
"summary": "\"deny-answer-aliases\" is a little-used feature intended to help recursive server operators protect end users against DNS rebinding attacks, a potential method of circumventing the security model used by client browsers. However, a defect in this feature makes it easy, when the feature is in use, to experience an assertion failure in name.c. Affects BIND 9.7.0->9.8.8, 9.9.0->9.9.13, 9.10.0->9.10.8, 9.11.0->9.11.4, 9.12.0->9.12.2, 9.13.0->9.13.2.",
"evidence": "osv:CVE-2018-5740",
"products": [],
"severity": "high",
"structured": {
"id": "CVE-2018-5740",
"aliases": [
"CVE-2018-5740"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"
}
],
"affected": [
{
"ranges": [
{
"repo": "https://github.com/isc-projects/bind9",
"type": "GIT",
"events": [
{
"introduced": "e3734ed6d178397992a7f354f75d3a8db785857c"
},
{
"fixed": "8fc2e36186691698d247ab040b83793a9189de73"
},
{
"introduced": "3514c49b2fbcdf95b2735878e2487fce9a3ddad5"
},
{
"fixed": "3f3dd451af293119716d912c77a6da5918bf523a"
},
{
"introduced": "63fbb3ea39094353765c04a6066b9e1d1013992a"
},
{
"fixed": "12f71327ff796ed24752a4286fc0b3d9b21a4a57"
},
{
"introduced": "1477c19dd9a347ee19a42dac227f299a4680506f"
},
{
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},
{
"introduced": "71a40862c0be867999867cd99e21c2266a5e452b"
},
{
"fixed": "3631aeb0709b460afc66ca8bff609bf93ef24bec"
},
{
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},
{
"fixed": "4f6ef2f3e5bacd74da2cf2e4f8e51f3d7682b9a1"
}
],
"database_specific": {
"extracted_events": [
{
"cpe": "cpe:2.3:a:isc:bind:*:*:*:*:*:*:*:*",
"range": [
{
"introduced": "9.7.0"
},
{
"fixed": "9.8.8"
}
],
"source": "CPE_RANGE"
},
{
"cpe": "cpe:2.3:a:isc:bind:*:*:*:*:*:*:*:*",
"range": [
{
"introduced": "9.9.0"
},
{
"fixed": "9.9.13"
}
],
"source": "CPE_RANGE"
},
{
"cpe": "cpe:2.3:a:isc:bind:*:*:*:*:*:*:*:*",
"range": [
{
"introduced": "9.10.0"
},
{
"fixed": "9.10.8"
}
],
"source": "CPE_RANGE"
},
{
"cpe": "cpe:2.3:a:isc:bind:*:*:*:*:*:*:*:*",
"range": [
{
"introduced": "9.11.0"
},
{
"fixed": "9.11.4"
}
],
"source": "CPE_RANGE"
},
{
"cpe": "cpe:2.3:a:isc:bind:*:*:*:*:*:*:*:*",
"range": [
{
"introduced": "9.12.0"
},
{
"fixed": "9.12.2"
}
],
"source": "CPE_RANGE"
},
{
"cpe": "cpe:2.3:a:isc:bind:*:*:*:*:*:*:*:*",
"range": [
{
"introduced": "9.13.0"
},
{
"fixed": "9.13.2"
}
],
"source": "CPE_RANGE"
}
]
}
}
],
"versions": [
"v9.9.13rc2",
"v9.11.4rc2",
"v9.13.0",
"v9.9.12rc1",
"v9.11.3rc1",
"v9.9.12b1",
"v9.11.3b1",
"v9.9.11rc1",
"v9.11.2rc1",
"v9.9.11b1",
"v9.11.2b1",
"v9.9.10",
"v9.11.1",
"v9.9.10rc3",
"v9.11.1rc3",
"v9.9.10rc2",
"v9.11.1rc2",
"v9.9.10rc1",
"v9.11.1rc1",
"v9.9.10b1",
"v9.11.1b1",
"v9.11.0",
"v9.9.9",
"v9.9.9rc1",
"v9.9.9b2",
"v9.9.9b1",
"v9.9.8",
"v9.9.8rc1",
"v9.9.8b1",
"v9.9.7",
"v9.9.7rc2",
"v9.9.7rc1",
"v9.9.7b1",
"v9.9.6",
"v9.9.6rc2",
"v9.9.6rc1",
"v9.9.6b2",
"v9.9.6b1",
"v9.9.5",
"v9.9.5rc2",
"v9.9.5rc1",
"v9.9.5b1",
"v9.9.4",
"v9.9.4rc2",
"v9.9.4b1",
"v9.9.3",
"v9.9.3rc2",
"v9.9.3rc1",
"v9.9.3b2",
"v9.9.3b1",
"v9.9.2rc1",
"v9.9.2b1",
"v9.9.1",
"v9.9.0"
],
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2018-5740.json"
}
},
{
"ranges": [
{
"repo": "https://gitlab.isc.org/isc-projects/bind9",
"type": "GIT",
"events": [
{
"introduced": "e3734ed6d178397992a7f354f75d3a8db785857c"
},
{
"fixed": "8fc2e36186691698d247ab040b83793a9189de73"
},
{
"introduced": "3514c49b2fbcdf95b2735878e2487fce9a3ddad5"
},
{
"fixed": "3f3dd451af293119716d912c77a6da5918bf523a"
},
{
"introduced": "63fbb3ea39094353765c04a6066b9e1d1013992a"
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{
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{
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{
"fixed": "2fe4344de48d6061bef5a4000066a99a7c1296a6"
},
{
"introduced": "71a40862c0be867999867cd99e21c2266a5e452b"
},
{
"fixed": "3631aeb0709b460afc66ca8bff609bf93ef24bec"
},
{
"introduced": "29b3a7d84240a51099490c0f39ae537f4e0d6a7a"
},
{
"fixed": "4f6ef2f3e5bacd74da2cf2e4f8e51f3d7682b9a1"
}
],
"database_specific": {
"extracted_events": [
{
"cpe": "cpe:2.3:a:isc:bind:*:*:*:*:*:*:*:*",
"range": [
{
"introduced": "9.7.0"
},
{
"fixed": "9.8.8"
}
],
"source": "CPE_RANGE"
},
{
"cpe": "cpe:2.3:a:isc:bind:*:*:*:*:*:*:*:*",
"range": [
{
"introduced": "9.9.0"
},
{
"fixed": "9.9.13"
}
],
"source": "CPE_RANGE"
},
{
"cpe": "cpe:2.3:a:isc:bind:*:*:*:*:*:*:*:*",
"range": [
{
"introduced": "9.10.0"
},
{
"fixed": "9.10.8"
}
],
"source": "CPE_RANGE"
},
{
"cpe": "cpe:2.3:a:isc:bind:*:*:*:*:*:*:*:*",
"range": [
{
"introduced": "9.11.0"
},
{
"fixed": "9.11.4"
}
],
"source": "CPE_RANGE"
},
{
"cpe": "cpe:2.3:a:isc:bind:*:*:*:*:*:*:*:*",
"range": [
{
"introduced": "9.12.0"
},
{
"fixed": "9.12.2"
}
],
"source": "CPE_RANGE"
},
{
"cpe": "cpe:2.3:a:isc:bind:*:*:*:*:*:*:*:*",
"range": [
{
"introduced": "9.13.0"
},
{
"fixed": "9.13.2"
}
],
"source": "CPE_RANGE"
}
]
}
}
],
"versions": [
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"v9.11.4rc2",
"v9.13.0",
"v9.9.12rc1",
"v9.11.3rc1",
"v9.9.12b1",
"v9.11.3b1",
"v9.9.11rc1",
"v9.11.2rc1",
"v9.9.11b1",
"v9.11.2b1",
"v9.9.10",
"v9.11.1",
"v9.9.10rc3",
"v9.11.1rc3",
"v9.9.10rc2",
"v9.11.1rc2",
"v9.9.10rc1",
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"v9.9.10b1",
"v9.11.1b1",
"v9.11.0",
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"v9.9.9b2",
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"v9.9.8b1",
"v9.9.7",
"v9.9.7rc2",
"v9.9.7rc1",
"v9.9.7b1",
"v9.9.6",
"v9.9.6rc2",
"v9.9.6rc1",
"v9.9.6b2",
"v9.9.6b1",
"v9.9.5",
"v9.9.5rc2",
"v9.9.5rc1",
"v9.9.5b1",
"v9.9.4",
"v9.9.4rc2",
"v9.9.4b1",
"v9.9.3",
"v9.9.3rc2",
"v9.9.3rc1",
"v9.9.3b2",
"v9.9.3b1",
"v9.9.2rc1",
"v9.9.2b1",
"v9.9.1",
"v9.9.0"
],
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2018-5740.json"
}
}
],
"modified": "2026-10-24T10:30:22.437128959Z",
"provider": "osv",
"references": [
"https://access.redhat.com/errata/RHSA-2018:2570",
"https://access.redhat.com/errata/RHSA-2018:2571",
"https://kb.isc.org/docs/aa-01639",
"https://lists.debian.org/debian-lts-announce/2018/08/msg00033.html",
"https://lists.debian.org/debian-lts-announce/2021/11/msg00001.html",
"https://security.gentoo.org/glsa/201903-13",
"https://security.netapp.com/advisory/ntap-20180926-0003/",
"https://support.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbux03927en_us",
"https://usn.ubuntu.com/3769-1/",
"https://usn.ubuntu.com/3769-2/"
],
"provider_metadata": {
"unresolved_ranges": [
{
"cpes": [
"cpe:2.3:o:canonical:ubuntu_linux:12.04:*:*:*:esm:*:*:*",
"cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:lts:*:*:*",
"cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:*",
"cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:*"
],
"vendor_product": "canonical:ubuntu_linux",
"extracted_events": [
{
"range": [
{
"introduced": "12.04"
},
{
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},
{
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},
{
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},
{
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},
{
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},
{
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},
{
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}
],
"source": "CPE_STRING"
}
]
},
{
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"cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*"
],
"vendor_product": "debian:debian_linux",
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{
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},
{
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},
{
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},
{
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}
],
"source": "CPE_STRING"
}
]
},
{
"cpes": [
"cpe:2.3:o:opensuse:leap:15.0:*:*:*:*:*:*:*",
"cpe:2.3:o:opensuse:leap:15.1:*:*:*:*:*:*:*",
"cpe:2.3:o:opensuse:leap:42.3:*:*:*:*:*:*:*"
],
"vendor_product": "opensuse:leap",
"extracted_events": [
{
"range": [
{
"introduced": "15.0"
},
{
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},
{
"introduced": "15.1"
},
{
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},
{
"introduced": "42.3"
},
{
"last_affected": "42.3"
}
],
"source": "CPE_STRING"
}
]
},
{
"cpes": [
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"cpe:2.3:o:redhat:enterprise_linux_desktop:7.0:*:*:*:*:*:*:*"
],
"vendor_product": "redhat:enterprise_linux_desktop",
"extracted_events": [
{
"range": [
{
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},
{
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},
{
"introduced": "7.0"
},
{
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}
],
"source": "CPE_STRING"
}
]
},
{
"cpes": [
"cpe:2.3:o:redhat:enterprise_linux_server:6.0:*:*:*:*:*:*:*",
"cpe:2.3:o:redhat:enterprise_linux_server:7.0:*:*:*:*:*:*:*"
],
"vendor_product": "redhat:enterprise_linux_server",
"extracted_events": [
{
"range": [
{
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},
{
"last_affected": "6.0"
},
{
"introduced": "7.0"
},
{
"last_affected": "7.0"
}
],
"source": "CPE_STRING"
}
]
},
{
"cpes": [
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],
"vendor_product": "redhat:enterprise_linux_server_aus",
"extracted_events": [
{
"range": [
{
"introduced": "7.6"
},
{
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}
],
"source": "CPE_STRING"
}
]
},
{
"cpes": [
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"cpe:2.3:o:redhat:enterprise_linux_server_eus:7.6:*:*:*:*:*:*:*"
],
"vendor_product": "redhat:enterprise_linux_server_eus",
"extracted_events": [
{
"range": [
{
"introduced": "7.5"
},
{
"last_affected": "7.5"
},
{
"introduced": "7.6"
},
{
"last_affected": "7.6"
}
],
"source": "CPE_STRING"
}
]
},
{
"cpes": [
"cpe:2.3:o:redhat:enterprise_linux_workstation:6.0:*:*:*:*:*:*:*",
"cpe:2.3:o:redhat:enterprise_linux_workstation:7.0:*:*:*:*:*:*:*"
],
"vendor_product": "redhat:enterprise_linux_workstation",
"extracted_events": [
{
"range": [
{
"introduced": "6.0"
},
{
"last_affected": "6.0"
},
{
"introduced": "7.0"
},
{
"last_affected": "7.0"
}
],
"source": "CPE_STRING"
}
]
}
]
}
},
"related_cves": [
{
"value": "CVE-2018-5740",
"evidence": "/id"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 430679,
"published_at": "2019-01-16T20:29:01.017+00:00"
}