High
proftpd-dfsg — security advisory
An issue was discovered in tls_verify_crl in ProFTPD through 1.3.6b. Failure to check for the appropriate field of a CRL entry (checking twice for subject, rather than once for subject and once for issuer) prevents some valid CRLs from being taken into account, and can allow clients whose certificates have been revoked to proceed with a connection to the server.
- Products
- proftpd-dfsg
- Affected versions
- 1.3.5-2, 1.3.5a-1, 1.3.5a-1build1, 1.3.5a-1ubuntu0.1, 1.3.5d-1, 1.3.5e-1build1, 1.3.6-6build2, 1.3.6c-1, 1.3.6c-2, 1.3.6c-2ubuntu0.1, 1.3.7b+dfsg-1, 1.3.7c+dfsg-1build1, 1.3.7c+dfsg-1ubuntu0.1, 1.3.8+dfsg-8, 1.3.8.a+dfsg-1, 1.3.8.b+dfsg-1, 1.3.8.b+dfsg-1build1, 1.3.8.b+dfsg-1build2, 1.3.8.b+dfsg-1build3, 1.3.8.b+dfsg-1ubuntu0.1, 1.3.8.c+dfsg-2, 1.3.8.c+dfsg-4, 1.3.9b~dfsg-1, 1.3.9d~dfsg-1, 1.3.9~dfsg-3, 1.3.9~dfsg-4
- Fixed versions
- Not specified
- CVEs
- CVE-2019-19270
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 31 Oct 2026, 00:28 UTC · Revision 1
Source evidence
An issue was discovered in tls_verify_crl in ProFTPD through 1.3.6b. Failure to check for the appropriate field of a CRL entry (checking twice for subject, rather than once for subject and once for issuer) prevents some valid CRLs from being taken into account, and can allow clients whose certificates have been revoked to proceed with a connection to the server.
osv:UBUNTU-CVE-2019-19270
proftpd-dfsg
Fixed versions: Not specified
proftpd-dfsg
Fixed versions: Not specified
proftpd-dfsg
Fixed versions: Not specified
proftpd-dfsg
Fixed versions: Not specified
proftpd-dfsg
Fixed versions: Not specified
proftpd-dfsg
Fixed versions: Not specified
proftpd-dfsg
Fixed versions: Not specified
proftpd-dfsg
Fixed versions: Not specified
Complete source record
{
"id": "c3da69a37298a6fdb40e1101932de458a5bd55d66e608b56fc64d3350f5299a6",
"url": "https://osv.dev/vulnerability/UBUNTU-CVE-2019-19270",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "UBUNTU-CVE-2019-19270",
"summary": "An issue was discovered in tls_verify_crl in ProFTPD through 1.3.6b. Failure to check for the appropriate field of a CRL entry (checking twice for subject, rather than once for subject and once for issuer) prevents some valid CRLs from being taken into account, and can allow clients whose certificates have been revoked to proceed with a connection to the server.",
"evidence": "osv:UBUNTU-CVE-2019-19270",
"products": [
{
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{
"value": "1.3.5-2",
"evidence": "/affected/0/versions"
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{
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"evidence": "/affected/0/versions"
},
{
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"evidence": "/affected/0/versions"
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{
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{
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{
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"evidence": "/affected/4/versions"
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{
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"evidence": "/affected/4/versions"
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{
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{
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{
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{
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{
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{
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"evidence": "/affected/5/versions"
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{
"value": "1.3.8.c+dfsg-4",
"evidence": "/affected/5/versions"
},
{
"value": "1.3.9~dfsg-3",
"evidence": "/affected/5/versions"
}
]
},
{
"name": {
"value": "proftpd-dfsg",
"evidence": "/affected/6/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
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"evidence": "/affected/6/versions"
},
{
"value": "1.3.9b~dfsg-1",
"evidence": "/affected/6/versions"
},
{
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{
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"evidence": "/affected/7/versions"
},
{
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"evidence": "/affected/7/versions"
}
]
}
],
"severity": "high",
"structured": {
"id": "UBUNTU-CVE-2019-19270",
"aliases": [
"UBUNTU-CVE-2019-19270"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N"
},
{
"type": "Ubuntu",
"score": "medium"
}
],
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{
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{
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"events": [
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]
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],
"package": {
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"purl": "pkg:deb/ubuntu/proftpd-dfsg?arch=source&distro=xenial",
"ecosystem": "Ubuntu:16.04:LTS"
},
"versions": [
"1.3.5-2",
"1.3.5a-1",
"1.3.5a-1build1",
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],
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},
"ecosystem_specific": {
"binaries": [
{
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},
{
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},
{
"binary_name": "proftpd-mod-ldap",
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},
{
"binary_name": "proftpd-mod-mysql",
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{
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{
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},
{
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},
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},
"ecosystem_specific": {
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},
{
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},
{
"binary_name": "proftpd-mod-geoip",
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},
{
"binary_name": "proftpd-mod-ldap",
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},
{
"binary_name": "proftpd-mod-mysql",
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},
{
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},
{
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{
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},
{
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},
{
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}
]
}
},
{
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],
"package": {
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"purl": "pkg:deb/ubuntu/proftpd-dfsg?arch=source&distro=stonking",
"ecosystem": "Ubuntu:26.10"
},
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"1.3.9b~dfsg-1",
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],
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},
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},
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"binary_version": "1.3.9d~dfsg-1"
},
{
"binary_name": "proftpd-mod-geoip",
"binary_version": "1.3.9d~dfsg-1"
},
{
"binary_name": "proftpd-mod-ldap",
"binary_version": "1.3.9d~dfsg-1"
},
{
"binary_name": "proftpd-mod-mysql",
"binary_version": "1.3.9d~dfsg-1"
},
{
"binary_name": "proftpd-mod-odbc",
"binary_version": "1.3.9d~dfsg-1"
},
{
"binary_name": "proftpd-mod-pgsql",
"binary_version": "1.3.9d~dfsg-1"
},
{
"binary_name": "proftpd-mod-snmp",
"binary_version": "1.3.9d~dfsg-1"
},
{
"binary_name": "proftpd-mod-sqlite",
"binary_version": "1.3.9d~dfsg-1"
},
{
"binary_name": "proftpd-mod-wrap",
"binary_version": "1.3.9d~dfsg-1"
}
]
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "proftpd-dfsg",
"purl": "pkg:deb/ubuntu/proftpd-dfsg?arch=source&distro=resolute",
"ecosystem": "Ubuntu:26.04:LTS"
},
"versions": [
"1.3.9~dfsg-3",
"1.3.9~dfsg-4"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2019/UBUNTU-CVE-2019-19270.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "proftpd-core",
"binary_version": "1.3.9~dfsg-4"
},
{
"binary_name": "proftpd-mod-crypto",
"binary_version": "1.3.9~dfsg-4"
},
{
"binary_name": "proftpd-mod-geoip",
"binary_version": "1.3.9~dfsg-4"
},
{
"binary_name": "proftpd-mod-ldap",
"binary_version": "1.3.9~dfsg-4"
},
{
"binary_name": "proftpd-mod-mysql",
"binary_version": "1.3.9~dfsg-4"
},
{
"binary_name": "proftpd-mod-odbc",
"binary_version": "1.3.9~dfsg-4"
},
{
"binary_name": "proftpd-mod-pgsql",
"binary_version": "1.3.9~dfsg-4"
},
{
"binary_name": "proftpd-mod-snmp",
"binary_version": "1.3.9~dfsg-4"
},
{
"binary_name": "proftpd-mod-sqlite",
"binary_version": "1.3.9~dfsg-4"
},
{
"binary_name": "proftpd-mod-wrap",
"binary_version": "1.3.9~dfsg-4"
}
]
}
}
],
"modified": "2026-10-17T12:55:25.215121247Z",
"provider": "osv",
"upstream": [
"CVE-2019-19270"
],
"references": [
"https://ubuntu.com/security/CVE-2019-19270",
"https://github.com/proftpd/proftpd/issues/859",
"https://www.cve.org/CVERecord?id=CVE-2019-19270"
]
},
"related_cves": [
{
"value": "CVE-2019-19270",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 353734,
"published_at": "2019-11-26T04:15:00+00:00"
}