ubuntu-cve-2020-19861
Vulnerability from osv_ubuntu
Published
2022-01-21 15:15
Modified
2026-04-22 07:39
Summary
Details
When a zone file in ldns 1.7.1 is parsed, the function ldns_nsec3_salt_data is too trusted for the length value obtained from the zone file. When the memcpy is copied, the 0xfe - ldns_rdf_size(salt_rdf) byte data can be copied, causing heap overflow information leakage.
Severity
7.5 (High)
N/A (UNKNOWN)
References
{
"affected": [
{
"ecosystem_specific": {
"availability": "Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro",
"binaries": [
{
"binary_name": "ldnsutils",
"binary_version": "1.6.17-8ubuntu0.1+esm1"
},
{
"binary_name": "libldns1",
"binary_version": "1.6.17-8ubuntu0.1+esm1"
},
{
"binary_name": "python-ldns",
"binary_version": "1.6.17-8ubuntu0.1+esm1"
}
]
},
"package": {
"ecosystem": "Ubuntu:Pro:16.04:LTS",
"name": "ldns",
"purl": "pkg:deb/ubuntu/ldns@1.6.17-8ubuntu0.1+esm1?arch=source\u0026distro=esm-infra/xenial"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "1.6.17-8ubuntu0.1+esm1"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"1.6.17-5",
"1.6.17-7",
"1.6.17-8",
"1.6.17-8ubuntu0.1"
]
},
{
"ecosystem_specific": {
"availability": "No subscription required",
"binaries": [
{
"binary_name": "ldnsutils",
"binary_version": "1.7.0-3ubuntu4.1"
},
{
"binary_name": "libldns2",
"binary_version": "1.7.0-3ubuntu4.1"
},
{
"binary_name": "python-ldns",
"binary_version": "1.7.0-3ubuntu4.1"
},
{
"binary_name": "python3-ldns",
"binary_version": "1.7.0-3ubuntu4.1"
}
]
},
"package": {
"ecosystem": "Ubuntu:18.04:LTS",
"name": "ldns",
"purl": "pkg:deb/ubuntu/ldns@1.7.0-3ubuntu4.1?arch=source\u0026distro=bionic"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "1.7.0-3ubuntu4.1"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"1.7.0-1ubuntu1",
"1.7.0-3ubuntu1",
"1.7.0-3ubuntu2",
"1.7.0-3ubuntu4"
]
},
{
"ecosystem_specific": {
"availability": "Available with Ubuntu Pro: https://ubuntu.com/pro",
"binaries": [
{
"binary_name": "ldnsutils",
"binary_version": "1.7.0-4.1ubuntu1+esm1"
},
{
"binary_name": "libldns2",
"binary_version": "1.7.0-4.1ubuntu1+esm1"
},
{
"binary_name": "python-ldns",
"binary_version": "1.7.0-4.1ubuntu1+esm1"
},
{
"binary_name": "python3-ldns",
"binary_version": "1.7.0-4.1ubuntu1+esm1"
}
]
},
"package": {
"ecosystem": "Ubuntu:Pro:20.04:LTS",
"name": "ldns",
"purl": "pkg:deb/ubuntu/ldns@1.7.0-4.1ubuntu1+esm1?arch=source\u0026distro=esm-apps/focal"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "1.7.0-4.1ubuntu1+esm1"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"1.7.0-3ubuntu8",
"1.7.0-4",
"1.7.0-4ubuntu1",
"1.7.0-4.1ubuntu1"
]
},
{
"ecosystem_specific": {
"availability": "Available with Ubuntu Pro: https://ubuntu.com/pro",
"binaries": [
{
"binary_name": "ldnsutils",
"binary_version": "1.7.1-2ubuntu4+esm1"
},
{
"binary_name": "libldns3",
"binary_version": "1.7.1-2ubuntu4+esm1"
},
{
"binary_name": "python3-ldns",
"binary_version": "1.7.1-2ubuntu4+esm1"
}
]
},
"package": {
"ecosystem": "Ubuntu:Pro:22.04:LTS",
"name": "ldns",
"purl": "pkg:deb/ubuntu/ldns@1.7.1-2ubuntu4+esm1?arch=source\u0026distro=esm-apps/jammy"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "1.7.1-2ubuntu4+esm1"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"1.7.1-2build1",
"1.7.1-2ubuntu1",
"1.7.1-2ubuntu3",
"1.7.1-2ubuntu4"
]
}
],
"aliases": [],
"details": "When a zone file in ldns 1.7.1 is parsed, the function ldns_nsec3_salt_data is too trusted for the length value obtained from the zone file. When the memcpy is copied, the 0xfe - ldns_rdf_size(salt_rdf) byte data can be copied, causing heap overflow information leakage.",
"id": "UBUNTU-CVE-2020-19861",
"modified": "2026-04-22T07:39:29Z",
"published": "2022-01-21T15:15:00Z",
"references": [
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2020-19861"
},
{
"type": "REPORT",
"url": "https://github.com/NLnetLabs/ldns/issues/51"
},
{
"type": "REPORT",
"url": "https://github.com/NLnetLabs/ldns/commit/136ec420437041fe13f344a2053e774f9050cc38"
},
{
"type": "ADVISORY",
"url": "https://ubuntu.com/security/notices/USN-5257-1"
},
{
"type": "ADVISORY",
"url": "https://ubuntu.com/security/notices/USN-5257-2"
},
{
"type": "REPORT",
"url": "https://www.cve.org/CVERecord?id=CVE-2020-19861"
}
],
"related": [
"USN-5257-1",
"USN-5257-2"
],
"schema_version": "1.7.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
"type": "CVSS_V3"
},
{
"score": "medium",
"type": "Ubuntu"
}
],
"upstream": [
"CVE-2020-19861"
]
}
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Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
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