Medium
Security advisory
OpenDMARC through 1.3.2 and 1.4.x allows attacks that inject authentication results to provide false information about the domain that originated an e-mail message. This is caused by incorrect parsing and interpretation of SPF/DKIM authentication results, as demonstrated by the example.net(.example.com substring.
- Products
- Not specified
- Affected versions
- Not specified
- Fixed versions
- Not specified
- CVEs
- CVE-2020-12272
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 1 Nov 2026, 08:12 UTC · Revision 1
Source evidence
OpenDMARC through 1.3.2 and 1.4.x allows attacks that inject authentication results to provide false information about the domain that originated an e-mail message. This is caused by incorrect parsing and interpretation of SPF/DKIM authentication results, as demonstrated by the example.net(.example.com substring.
osv:CVE-2020-12272
Complete source record
{
"id": "a4c0519041ad482bf71c2047d8a782869d337502b86851077a345ddff88d672b",
"url": "https://osv.dev/vulnerability/CVE-2020-12272",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "CVE-2020-12272",
"summary": "OpenDMARC through 1.3.2 and 1.4.x allows attacks that inject authentication results to provide false information about the domain that originated an e-mail message. This is caused by incorrect parsing and interpretation of SPF/DKIM authentication results, as demonstrated by the example.net(.example.com substring.",
"evidence": "osv:CVE-2020-12272",
"products": [],
"severity": "medium",
"structured": {
"id": "CVE-2020-12272",
"aliases": [
"CVE-2020-12272"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N"
}
],
"affected": [
{
"ranges": [
{
"repo": "https://github.com/trusteddomainproject/opendmarc",
"type": "GIT",
"events": [
{
"introduced": "44b92727f8fc60e9481ef319c186387f8a8b6aa1"
},
{
"last_affected": "0d65077648569076c103b73f30ca86c14e1811a5"
},
{
"introduced": "a29adab78ea9b6625066fdc482eae0ec6aa19ca6"
},
{
"last_affected": "363e4a82231b4366bdb92e72e612331ecda70c01"
}
],
"database_specific": {
"extracted_events": [
{
"cpe": "cpe:2.3:a:trusteddomain:opendmarc:*:*:*:*:*:*:*:*",
"range": [
{
"introduced": "1.0.0"
},
{
"last_affected": "1.3.2"
}
],
"source": "CPE_RANGE"
},
{
"cpe": "cpe:2.3:a:trusteddomain:opendmarc:1.4.0:-:*:*:*:*:*:*",
"range": [
{
"introduced": "1.4.0-NA"
},
{
"last_affected": "1.4.0-NA"
}
],
"source": "CPE_STRING"
},
{
"cpe": "cpe:2.3:a:trusteddomain:opendmarc:1.4.0:beta0:*:*:*:*:*:*",
"range": [
{
"introduced": "1.4.0-beta0"
},
{
"last_affected": "1.4.0-beta0"
}
],
"source": "CPE_STRING"
},
{
"cpe": "cpe:2.3:a:trusteddomain:opendmarc:1.4.0:beta1:*:*:*:*:*:*",
"range": [
{
"introduced": "1.4.0-beta1"
},
{
"last_affected": "1.4.0-beta1"
}
],
"source": "CPE_STRING"
}
]
}
}
],
"versions": [
"1.4.0-NA",
"1.4.0-beta0",
"1.4.0-beta1",
"rel-opendmarc-1-3-2",
"rel-opendmarc-1-3-1",
"rel-opendmarc-1-3-1-Beta1",
"rel-opendmarc-1-3-1-Beta0",
"rel-opendmarc-1-3-0",
"rel-opendmarc-1-3-0-Beta4",
"rel-opendmarc-1-3-0-Beta3",
"rel-opendmarc-1-3-0-Beta0",
"rel-opendmarc-1-3-0-Beta2",
"rel-opendmarc-1-3-0-Beta1",
"rel-opendmarc-1-2-1-Beta2",
"rel-opendmarc-1-2-1-Beta1",
"rel-opendmarc-1-2-1-Beta0",
"draft-dmarc-base-03",
"rel-opendmarc-1-2-0-Beta3",
"rel-opendmarc-1-2-0",
"rel-opendmarc-1-2-0-Beta2",
"rel-opendmarc-1-1-2",
"rel-opendmarc-1-1-1",
"rel-opendmarc-1-1-0",
"rel-opendmarc-1-1-0-Beta2",
"rel-opendmarc-1-1-0-Beta1",
"rel-opendmarc-1-1-0-Beta0",
"draft-dmarc-base-00-03",
"rel-opendmarc-1-0-1",
"rel-opendmarc-1-0-0"
],
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2020-12272.json"
}
}
],
"modified": "2026-10-24T10:31:04.282118116Z",
"provider": "osv",
"references": [
"https://lists.debian.org/debian-lts-announce/2023/08/msg00035.html",
"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/2D4JGHMALEJEWWG56DKR5OZB22TK7W5B/",
"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/KBOGOQOK3TIWWJV66MW5YWNRJAFFYGR5/",
"https://www.usenix.org/system/files/sec20fall_chen-jianjun_prepub_0.pdf",
"https://sourceforge.net/p/opendmarc/tickets/237/"
],
"provider_metadata": {
"unresolved_ranges": [
{
"cpes": [
"cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:*",
"cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:*"
],
"vendor_product": "fedoraproject:fedora",
"extracted_events": [
{
"range": [
{
"introduced": "33"
},
{
"last_affected": "33"
},
{
"introduced": "34"
},
{
"last_affected": "34"
}
],
"source": "CPE_STRING"
}
]
}
]
}
},
"related_cves": [
{
"value": "CVE-2020-12272",
"evidence": "/id"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 440460,
"published_at": "2020-04-27T14:15:11.33+00:00"
}