Critical
Security advisory
OpenDMARC through 1.3.2 and 1.4.x through 1.4.0-Beta1 has improper null termination in the function opendmarc_xml_parse that can result in a one-byte heap overflow in opendmarc_xml when parsing a specially crafted DMARC aggregate report. This can cause remote memory corruption when a '\0' byte overwrites the heap metadata of the next chunk and its PREV_INUSE flag.
- Products
- Not specified
- Affected versions
- Not specified
- Fixed versions
- Not specified
- CVEs
- CVE-2020-12460
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 31 Oct 2026, 10:41 UTC · Revision 1
Source evidence
OpenDMARC through 1.3.2 and 1.4.x through 1.4.0-Beta1 has improper null termination in the function opendmarc_xml_parse that can result in a one-byte heap overflow in opendmarc_xml when parsing a specially crafted DMARC aggregate report. This can cause remote memory corruption when a '\0' byte overwrites the heap metadata of the next chunk and its PREV_INUSE flag.
osv:CVE-2020-12460
Complete source record
{
"id": "e0674f81e27e74f3b152ccc67f6cfd0f3598eee86b6f0eee3d57ad154aeefb80",
"url": "https://osv.dev/vulnerability/CVE-2020-12460",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "CVE-2020-12460",
"summary": "OpenDMARC through 1.3.2 and 1.4.x through 1.4.0-Beta1 has improper null termination in the function opendmarc_xml_parse that can result in a one-byte heap overflow in opendmarc_xml when parsing a specially crafted DMARC aggregate report. This can cause remote memory corruption when a '\\0' byte overwrites the heap metadata of the next chunk and its PREV_INUSE flag.",
"evidence": "osv:CVE-2020-12460",
"products": [],
"severity": "critical",
"structured": {
"id": "CVE-2020-12460",
"aliases": [
"CVE-2020-12460"
],
"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/trusteddomainproject/opendmarc",
"type": "GIT",
"events": [
{
"introduced": "0"
},
{
"last_affected": "0d65077648569076c103b73f30ca86c14e1811a5"
},
{
"introduced": "12d9064bef02f152df233fab2f4bd863f0c28820"
},
{
"last_affected": "363e4a82231b4366bdb92e72e612331ecda70c01"
}
],
"database_specific": {
"extracted_events": [
{
"cpe": "cpe:2.3:a:trusteddomain:opendmarc:*:*:*:*:*:*:*:*",
"range": [
{
"introduced": "0"
},
{
"last_affected": "1.3.2"
}
],
"source": "CPE_RANGE"
},
{
"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-beta0",
"1.4.0-beta1",
"rel-opendmarc-1-4-0-Beta0",
"rel-opendmarc-1-3-2",
"rel-opendmarc-1-4-0-Beta1",
"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",
"rel-opendmarc-1-0-0-Beta0",
"rel-opendmarc-0-2-2",
"rel-opendmarc-0-2-1",
"rel-opendmarc-0-2-0",
"rel-opendmarc-0-2-0-Beta3",
"rel-opendmarc-0-2-0-Beta2",
"rel-opendmarc-0-2-0-Beta1",
"rel-opendmarc-0-2-0-Beta0",
"rel-opendmarc-0-1-8",
"rel-opendmarc-0-1-7",
"rel-opendmarc-0-1-6",
"rel-opendmarc-0-1-5",
"rel-opendmarc-0-1-4",
"rel-opendmarc-0-1-3",
"rel-opendmarc-0-1-2",
"rel-opendmarc-0-1-1",
"rel-opendmarc-0-1-0"
],
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2020-12460.json"
}
}
],
"modified": "2026-10-20T10:51:06.126913449Z",
"provider": "osv",
"references": [
"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/JHDKMCZGE3W4XBP76NLI2Q7IOZHXLD4A/",
"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/KBOGOQOK3TIWWJV66MW5YWNRJAFFYGR5/",
"https://lists.debian.org/debian-lts-announce/2021/04/msg00026.html",
"https://security.gentoo.org/glsa/202011-02",
"https://sourceforge.net/projects/opendmarc/",
"https://github.com/trusteddomainproject/OpenDMARC/issues/64"
],
"provider_metadata": {
"unresolved_ranges": [
{
"cpes": [
"cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*"
],
"vendor_product": "debian:debian_linux",
"extracted_events": [
{
"range": [
{
"introduced": "9.0"
},
{
"last_affected": "9.0"
}
],
"source": "CPE_STRING"
}
]
},
{
"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-2020-12460",
"evidence": "/id"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 382471,
"published_at": "2020-07-27T23:15:12.373+00:00"
}