High
Security advisory
In BIND 9.10.0 -> 9.11.21, 9.12.0 -> 9.16.5, 9.17.0 -> 9.17.3, also affects 9.10.5-S1 -> 9.11.21-S1 of the BIND 9 Supported Preview Edition, An attacker that can reach a vulnerable system with a specially crafted query packet can trigger a crash. To be vulnerable, the system must: * be running BIND that was built with "--enable-native-pkcs11" * be signing one or more zones with an RSA key * be able to receive queries from a possible attacker
- Products
- Not specified
- Affected versions
- Not specified
- Fixed versions
- Not specified
- CVEs
- CVE-2020-8623
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 1 Nov 2026, 12:00 UTC · Revision 1
Source evidence
In BIND 9.10.0 -> 9.11.21, 9.12.0 -> 9.16.5, 9.17.0 -> 9.17.3, also affects 9.10.5-S1 -> 9.11.21-S1 of the BIND 9 Supported Preview Edition, An attacker that can reach a vulnerable system with a specially crafted query packet can trigger a crash. To be vulnerable, the system must: * be running BIND that was built with "--enable-native-pkcs11" * be signing one or more zones with an RSA key * be able to receive queries from a possible attacker
osv:CVE-2020-8623
Complete source record
{
"id": "fc19b21e41ce295cf7bf7b1742afdbe4aefda11c7c64c5a2ae9bafc9091b102e",
"url": "https://osv.dev/vulnerability/CVE-2020-8623",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "CVE-2020-8623",
"summary": "In BIND 9.10.0 -> 9.11.21, 9.12.0 -> 9.16.5, 9.17.0 -> 9.17.3, also affects 9.10.5-S1 -> 9.11.21-S1 of the BIND 9 Supported Preview Edition, An attacker that can reach a vulnerable system with a specially crafted query packet can trigger a crash. To be vulnerable, the system must: * be running BIND that was built with \"--enable-native-pkcs11\" * be signing one or more zones with an RSA key * be able to receive queries from a possible attacker",
"evidence": "osv:CVE-2020-8623",
"products": [],
"severity": "high",
"structured": {
"id": "CVE-2020-8623",
"aliases": [
"CVE-2020-8623"
],
"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": "63fbb3ea39094353765c04a6066b9e1d1013992a"
},
{
"last_affected": "4ce7edb5801e41d14b0da003d97f81b0d73424c9"
},
{
"introduced": "b2307b25465c16d37ff6de22438a2d214287417c"
},
{
"last_affected": "c00b4586ab21960bc2b13989f77ea8465e989187"
},
{
"introduced": "04ca7cc4b6993f47ea61852c759d047c83be7b3f"
},
{
"last_affected": "079e9baebe7d2b42610b9d7bdc0f8a5f78bbe2d5"
},
{
"introduced": "341e64a2de908ceec50ed46d243bf3402342735c"
},
{
"last_affected": "341e64a2de908ceec50ed46d243bf3402342735c"
}
],
"database_specific": {
"extracted_events": [
{
"cpe": "cpe:2.3:a:isc:bind:*:*:*:*:*:*:*:*",
"range": [
{
"introduced": "9.10.0"
},
{
"last_affected": "9.11.21"
}
],
"source": "CPE_RANGE"
},
{
"cpe": "cpe:2.3:a:isc:bind:*:*:*:*:*:*:*:*",
"range": [
{
"introduced": "9.12.1"
},
{
"last_affected": "9.16.5"
}
],
"source": "CPE_RANGE"
},
{
"cpe": "cpe:2.3:a:isc:bind:*:*:*:*:*:*:*:*",
"range": [
{
"introduced": "9.17.0"
},
{
"last_affected": "9.17.3"
}
],
"source": "CPE_RANGE"
},
{
"cpe": "cpe:2.3:a:isc:bind:9.10.5:s1:*:*:supported_preview:*:*:*",
"range": [
{
"introduced": "9.10.5-s1"
},
{
"last_affected": "9.10.5-s1"
}
],
"source": "CPE_STRING"
}
]
}
}
],
"versions": [
"9.10.5-s1",
"v9.10.5b1"
],
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2020-8623.json"
}
},
{
"ranges": [
{
"repo": "https://gitlab.isc.org/isc-projects/bind9",
"type": "GIT",
"events": [
{
"introduced": "63fbb3ea39094353765c04a6066b9e1d1013992a"
},
{
"last_affected": "4ce7edb5801e41d14b0da003d97f81b0d73424c9"
},
{
"introduced": "b2307b25465c16d37ff6de22438a2d214287417c"
},
{
"last_affected": "c00b4586ab21960bc2b13989f77ea8465e989187"
},
{
"introduced": "04ca7cc4b6993f47ea61852c759d047c83be7b3f"
},
{
"last_affected": "079e9baebe7d2b42610b9d7bdc0f8a5f78bbe2d5"
},
{
"introduced": "341e64a2de908ceec50ed46d243bf3402342735c"
},
{
"last_affected": "341e64a2de908ceec50ed46d243bf3402342735c"
}
],
"database_specific": {
"extracted_events": [
{
"cpe": "cpe:2.3:a:isc:bind:*:*:*:*:*:*:*:*",
"range": [
{
"introduced": "9.10.0"
},
{
"last_affected": "9.11.21"
}
],
"source": "CPE_RANGE"
},
{
"cpe": "cpe:2.3:a:isc:bind:*:*:*:*:*:*:*:*",
"range": [
{
"introduced": "9.12.1"
},
{
"last_affected": "9.16.5"
}
],
"source": "CPE_RANGE"
},
{
"cpe": "cpe:2.3:a:isc:bind:*:*:*:*:*:*:*:*",
"range": [
{
"introduced": "9.17.0"
},
{
"last_affected": "9.17.3"
}
],
"source": "CPE_RANGE"
},
{
"cpe": "cpe:2.3:a:isc:bind:9.10.5:s1:*:*:supported_preview:*:*:*",
"range": [
{
"introduced": "9.10.5-s1"
},
{
"last_affected": "9.10.5-s1"
}
],
"source": "CPE_STRING"
}
]
}
}
],
"versions": [
"9.10.5-s1",
"v9.10.5b1"
],
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2020-8623.json"
}
}
],
"modified": "2026-10-26T10:45:08.377550485Z",
"provider": "osv",
"references": [
"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/DQN62GBMCIC5AY4KYADGXNKVY6AJKSJE/",
"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ZKAMJZXR66P6S5LEU4SN7USSNCWTXEXP/",
"https://kb.isc.org/docs/cve-2020-8623",
"https://lists.debian.org/debian-lts-announce/2020/08/msg00053.html",
"https://security.gentoo.org/glsa/202008-19",
"https://security.netapp.com/advisory/ntap-20200827-0003/",
"https://usn.ubuntu.com/4468-1/",
"https://www.debian.org/security/2020/dsa-4752",
"https://www.synology.com/security/advisory/Synology_SA_20_19"
],
"provider_metadata": {
"unresolved_ranges": [
{
"cpes": [
"cpe:2.3:a:synology:dns_server:*:*:*:*:*:*:*:*"
],
"vendor_product": "synology:dns_server",
"extracted_events": [
{
"range": [
{
"fixed": "2.2.2-5027"
}
],
"source": "CPE_RANGE"
}
]
},
{
"cpes": [
"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:20.04:*:*:*:lts:*:*:*"
],
"vendor_product": "canonical:ubuntu_linux",
"extracted_events": [
{
"range": [
{
"introduced": "16.04"
},
{
"last_affected": "16.04"
},
{
"introduced": "18.04"
},
{
"last_affected": "18.04"
},
{
"introduced": "20.04"
},
{
"last_affected": "20.04"
}
],
"source": "CPE_STRING"
}
]
},
{
"cpes": [
"cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*",
"cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*"
],
"vendor_product": "debian:debian_linux",
"extracted_events": [
{
"range": [
{
"introduced": "9.0"
},
{
"last_affected": "9.0"
},
{
"introduced": "10.0"
},
{
"last_affected": "10.0"
}
],
"source": "CPE_STRING"
}
]
},
{
"cpes": [
"cpe:2.3:o:fedoraproject:fedora:31:*:*:*:*:*:*:*",
"cpe:2.3:o:fedoraproject:fedora:32:*:*:*:*:*:*:*"
],
"vendor_product": "fedoraproject:fedora",
"extracted_events": [
{
"range": [
{
"introduced": "31"
},
{
"last_affected": "31"
},
{
"introduced": "32"
},
{
"last_affected": "32"
}
],
"source": "CPE_STRING"
}
]
},
{
"cpes": [
"cpe:2.3:a:isc:bind:9.11.21:s1:*:*:supported_preview:*:*:*"
],
"vendor_product": "isc:bind",
"extracted_events": [
{
"range": [
{
"introduced": "9.11.21-s1"
},
{
"last_affected": "9.11.21-s1"
},
{
"introduced": "9.11.21-s1"
},
{
"last_affected": "9.11.21-s1"
}
],
"source": "CPE_STRING"
}
]
},
{
"cpes": [
"cpe:2.3:o:opensuse:leap:15.1:*:*:*:*:*:*:*",
"cpe:2.3:o:opensuse:leap:15.2:*:*:*:*:*:*:*"
],
"vendor_product": "opensuse:leap",
"extracted_events": [
{
"range": [
{
"introduced": "15.1"
},
{
"last_affected": "15.1"
},
{
"introduced": "15.2"
},
{
"last_affected": "15.2"
}
],
"source": "CPE_STRING"
}
]
}
]
}
},
"related_cves": [
{
"value": "CVE-2020-8623",
"evidence": "/id"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 450302,
"published_at": "2020-08-21T21:15:12.327+00:00"
}