Medium
Security advisory
In BIND 9.0.0 -> 9.11.21, 9.12.0 -> 9.16.5, 9.17.0 -> 9.17.3, also affects 9.9.3-S1 -> 9.11.21-S1 of the BIND 9 Supported Preview Edition, An attacker on the network path for a TSIG-signed request, or operating the server receiving the TSIG-signed request, could send a truncated response to that request, triggering an assertion failure, causing the server to exit. Alternately, an off-path attacker would have to correctly guess when a TSIG-signed request was sent, along with other characteristics of the packet and message, and spoof a truncated response to trigger an assertion failure, causing the server to exit.
- Products
- Not specified
- Affected versions
- Not specified
- Fixed versions
- Not specified
- CVEs
- CVE-2020-8622
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 1 Nov 2026, 07:38 UTC · Revision 1
Source evidence
In BIND 9.0.0 -> 9.11.21, 9.12.0 -> 9.16.5, 9.17.0 -> 9.17.3, also affects 9.9.3-S1 -> 9.11.21-S1 of the BIND 9 Supported Preview Edition, An attacker on the network path for a TSIG-signed request, or operating the server receiving the TSIG-signed request, could send a truncated response to that request, triggering an assertion failure, causing the server to exit. Alternately, an off-path attacker would have to correctly guess when a TSIG-signed request was sent, along with other characteristics of the packet and message, and spoof a truncated response to trigger an assertion failure, causing the server to exit.
osv:CVE-2020-8622
Complete source record
{
"id": "2092898beb1d45b82d85dc927e5eb39cc74fe754fb4be61c128843473f171ac7",
"url": "https://osv.dev/vulnerability/CVE-2020-8622",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "CVE-2020-8622",
"summary": "In BIND 9.0.0 -> 9.11.21, 9.12.0 -> 9.16.5, 9.17.0 -> 9.17.3, also affects 9.9.3-S1 -> 9.11.21-S1 of the BIND 9 Supported Preview Edition, An attacker on the network path for a TSIG-signed request, or operating the server receiving the TSIG-signed request, could send a truncated response to that request, triggering an assertion failure, causing the server to exit. Alternately, an off-path attacker would have to correctly guess when a TSIG-signed request was sent, along with other characteristics of the packet and message, and spoof a truncated response to trigger an assertion failure, causing the server to exit.",
"evidence": "osv:CVE-2020-8622",
"products": [],
"severity": "medium",
"structured": {
"id": "CVE-2020-8622",
"aliases": [
"CVE-2020-8622"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H"
}
],
"affected": [
{
"ranges": [
{
"repo": "https://github.com/isc-projects/bind9",
"type": "GIT",
"events": [
{
"introduced": "19d6c56085e97cf4ac559cdc27edd624127bcb32"
},
{
"last_affected": "4ce7edb5801e41d14b0da003d97f81b0d73424c9"
},
{
"introduced": "71a40862c0be867999867cd99e21c2266a5e452b"
},
{
"last_affected": "c00b4586ab21960bc2b13989f77ea8465e989187"
},
{
"introduced": "04ca7cc4b6993f47ea61852c759d047c83be7b3f"
},
{
"last_affected": "079e9baebe7d2b42610b9d7bdc0f8a5f78bbe2d5"
},
{
"introduced": "1c59cea1c0e26e2da3f2afb90200bfe9f7748c03"
},
{
"last_affected": "1c59cea1c0e26e2da3f2afb90200bfe9f7748c03"
}
],
"database_specific": {
"extracted_events": [
{
"cpe": "cpe:2.3:a:isc:bind:*:*:*:*:*:*:*:*",
"range": [
{
"introduced": "9.0.0"
},
{
"last_affected": "9.11.21"
}
],
"source": "CPE_RANGE"
},
{
"cpe": "cpe:2.3:a:isc:bind:*:*:*:*:*:*:*:*",
"range": [
{
"introduced": "9.12.0"
},
{
"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:9.9.3:s1:*:*:supported_preview:*:*:*",
"range": [
{
"introduced": "9.9.3-s1"
},
{
"last_affected": "9.9.3-s1"
}
],
"source": "CPE_STRING"
}
]
}
}
],
"versions": [
"9.9.3-s1",
"v9.9.3b1"
],
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2020-8622.json"
}
},
{
"ranges": [
{
"repo": "https://gitlab.isc.org/isc-projects/bind9",
"type": "GIT",
"events": [
{
"introduced": "19d6c56085e97cf4ac559cdc27edd624127bcb32"
},
{
"last_affected": "4ce7edb5801e41d14b0da003d97f81b0d73424c9"
},
{
"introduced": "71a40862c0be867999867cd99e21c2266a5e452b"
},
{
"last_affected": "c00b4586ab21960bc2b13989f77ea8465e989187"
},
{
"introduced": "04ca7cc4b6993f47ea61852c759d047c83be7b3f"
},
{
"last_affected": "079e9baebe7d2b42610b9d7bdc0f8a5f78bbe2d5"
},
{
"introduced": "1c59cea1c0e26e2da3f2afb90200bfe9f7748c03"
},
{
"last_affected": "1c59cea1c0e26e2da3f2afb90200bfe9f7748c03"
}
],
"database_specific": {
"extracted_events": [
{
"cpe": "cpe:2.3:a:isc:bind:*:*:*:*:*:*:*:*",
"range": [
{
"introduced": "9.0.0"
},
{
"last_affected": "9.11.21"
}
],
"source": "CPE_RANGE"
},
{
"cpe": "cpe:2.3:a:isc:bind:*:*:*:*:*:*:*:*",
"range": [
{
"introduced": "9.12.0"
},
{
"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:9.9.3:s1:*:*:supported_preview:*:*:*",
"range": [
{
"introduced": "9.9.3-s1"
},
{
"last_affected": "9.9.3-s1"
}
],
"source": "CPE_STRING"
}
]
}
}
],
"versions": [
"9.9.3-s1",
"v9.9.3b1"
],
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2020-8622.json"
}
}
],
"modified": "2026-10-24T10:30:56.035170167Z",
"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-2020-8622",
"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://usn.ubuntu.com/4468-2/",
"https://www.debian.org/security/2020/dsa-4752",
"https://www.synology.com/security/advisory/Synology_SA_20_19",
"https://www.oracle.com/security-alerts/cpuoct2021.html"
],
"provider_metadata": {
"unresolved_ranges": [
{
"cpes": [
"cpe:2.3:a:oracle:communications_diameter_signaling_router:*:*:*:*:*:*:*:*"
],
"vendor_product": "oracle:communications_diameter_signaling_router",
"extracted_events": [
{
"range": [
{
"introduced": "8.0.0"
},
{
"last_affected": "8.5.0"
}
],
"source": "CPE_RANGE"
}
]
},
{
"cpes": [
"cpe:2.3:a:synology:dns_server:*:*:*:*:*:*:*:*"
],
"vendor_product": "synology:dns_server",
"extracted_events": [
{
"range": [
{
"fixed": "2.2.2-5028"
}
],
"source": "CPE_RANGE"
}
]
},
{
"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:18.04:*:*:*:lts:*:*:*",
"cpe:2.3:o:canonical:ubuntu_linux:20.04:*:*:*:lts:*:*:*"
],
"vendor_product": "canonical:ubuntu_linux",
"extracted_events": [
{
"range": [
{
"introduced": "12.04"
},
{
"last_affected": "12.04"
},
{
"introduced": "14.04"
},
{
"last_affected": "14.04"
},
{
"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-2020-8622",
"evidence": "/id"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 438571,
"published_at": "2020-08-21T21:15:12.247+00:00"
}