High
389-ds-base — security advisory
In 389-ds-base up to version 1.4.1.2, requests are handled by workers threads. Each sockets will be waited by the worker for at most 'ioblocktimeout' seconds. However this timeout applies only for un-encrypted requests. Connections using SSL/TLS are not taking this timeout into account during reads, and may hang longer.An unauthenticated attacker could repeatedly create hanging LDAP requests to hang all the workers, resulting in a Denial of Service.
- Products
- 389-ds-base
- Affected versions
- 1.3.3.12-1build1, 1.3.3.13-1, 1.3.4.5-2, 1.3.4.8-1, 1.3.4.8-3, 1.3.4.8-3ubuntu1, 1.3.4.8-4, 1.3.4.9-1, 1.3.4.9-1ubuntu0.1~esm1, 1.3.7.10-1, 1.3.7.10-1ubuntu1, 1.3.7.10-1ubuntu1+esm1, 1.3.7.5-1, 1.3.7.5-1build1, 1.3.7.5-1build2, 1.3.7.9-1, 3.1.2+dfsg1-1, 3.1.2+vendor1-2, 3.1.2+vendor1-2build1, 3.3.1-3
- Fixed versions
- Not specified
- CVEs
- CVE-2019-3883
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 31 Oct 2026, 00:50 UTC · Revision 1
Source evidence
In 389-ds-base up to version 1.4.1.2, requests are handled by workers threads. Each sockets will be waited by the worker for at most 'ioblocktimeout' seconds. However this timeout applies only for un-encrypted requests. Connections using SSL/TLS are not taking this timeout into account during reads, and may hang longer.An unauthenticated attacker could repeatedly create hanging LDAP requests to hang all the workers, resulting in a Denial of Service.
osv:UBUNTU-CVE-2019-3883
389-ds-base
Fixed versions: Not specified
389-ds-base
Fixed versions: Not specified
389-ds-base
Fixed versions: Not specified
389-ds-base
Fixed versions: Not specified
Complete source record
{
"id": "c6a6bb7b0917913bf97fb923d4058acf41c19400fb6023c6ca2c9c9a8128b0a1",
"url": "https://osv.dev/vulnerability/UBUNTU-CVE-2019-3883",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "UBUNTU-CVE-2019-3883",
"summary": "In 389-ds-base up to version 1.4.1.2, requests are handled by workers threads. Each sockets will be waited by the worker for at most 'ioblocktimeout' seconds. However this timeout applies only for un-encrypted requests. Connections using SSL/TLS are not taking this timeout into account during reads, and may hang longer.An unauthenticated attacker could repeatedly create hanging LDAP requests to hang all the workers, resulting in a Denial of Service.",
"evidence": "osv:UBUNTU-CVE-2019-3883",
"products": [
{
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"value": "389-ds-base",
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},
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"affected_versions": [
{
"value": "1.3.3.12-1build1",
"evidence": "/affected/0/versions"
},
{
"value": "1.3.3.13-1",
"evidence": "/affected/0/versions"
},
{
"value": "1.3.4.5-2",
"evidence": "/affected/0/versions"
},
{
"value": "1.3.4.8-1",
"evidence": "/affected/0/versions"
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{
"value": "1.3.4.8-3",
"evidence": "/affected/0/versions"
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{
"value": "1.3.4.8-3ubuntu1",
"evidence": "/affected/0/versions"
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{
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"evidence": "/affected/0/versions"
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{
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"evidence": "/affected/0/versions"
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{
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"evidence": "/affected/0/versions"
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]
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"evidence": "/affected/1/package/name"
},
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"affected_versions": [
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"evidence": "/affected/1/versions"
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{
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"evidence": "/affected/1/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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"affected_versions": [
{
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"evidence": "/affected/2/versions"
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{
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"evidence": "/affected/2/versions"
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{
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"evidence": "/affected/2/versions"
}
]
},
{
"name": {
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"evidence": "/affected/3/package/name"
},
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"affected_versions": [
{
"value": "3.1.2+dfsg1-1",
"evidence": "/affected/3/versions"
},
{
"value": "3.1.2+vendor1-2",
"evidence": "/affected/3/versions"
}
]
}
],
"severity": "high",
"structured": {
"id": "UBUNTU-CVE-2019-3883",
"aliases": [
"UBUNTU-CVE-2019-3883"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L"
},
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"
},
{
"type": "Ubuntu",
"score": "medium"
}
],
"affected": [
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "389-ds-base",
"purl": "pkg:deb/ubuntu/389-ds-base?arch=source&distro=esm-apps%2Fxenial",
"ecosystem": "Ubuntu:Pro:16.04:LTS"
},
"versions": [
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],
"database_specific": {
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},
"ecosystem_specific": {
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"binary_version": "1.3.4.9-1ubuntu0.1~esm1"
},
{
"binary_name": "389-ds-base",
"binary_version": "1.3.4.9-1ubuntu0.1~esm1"
},
{
"binary_name": "389-ds-base-libs",
"binary_version": "1.3.4.9-1ubuntu0.1~esm1"
}
]
}
},
{
"ranges": [
{
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"package": {
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"purl": "pkg:deb/ubuntu/389-ds-base?arch=source&distro=esm-apps%2Fbionic",
"ecosystem": "Ubuntu:Pro:18.04:LTS"
},
"versions": [
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"1.3.7.5-1build2",
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"1.3.7.10-1",
"1.3.7.10-1ubuntu1",
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],
"database_specific": {
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},
"ecosystem_specific": {
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},
{
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},
{
"binary_name": "389-ds-base-libs",
"binary_version": "1.3.7.10-1ubuntu1+esm1"
},
{
"binary_name": "python3-dirsrvtests",
"binary_version": "1.3.7.10-1ubuntu1+esm1"
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{
"binary_name": "python3-lib389",
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},
{
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"package": {
"name": "389-ds-base",
"purl": "pkg:deb/ubuntu/389-ds-base?arch=source&distro=stonking",
"ecosystem": "Ubuntu:26.10"
},
"versions": [
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"ecosystem_specific": {
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"ecosystem": "Ubuntu:26.04:LTS"
},
"versions": [
"3.1.2+dfsg1-1",
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],
"database_specific": {
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},
"ecosystem_specific": {
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{
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{
"binary_name": "cockpit-389-ds",
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}
],
"modified": "2026-10-17T12:56:08.864687924Z",
"provider": "osv",
"upstream": [
"CVE-2019-3883"
],
"references": [
"https://ubuntu.com/security/CVE-2019-3883",
"https://bugzilla.redhat.com/show_bug.cgi?id=1693612",
"https://pagure.io/389-ds-base/issue/50329",
"https://www.cve.org/CVERecord?id=CVE-2019-3883"
]
},
"related_cves": [
{
"value": "CVE-2019-3883",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": "/severity/1/score"
},
"source_id": "core-osv",
"document_id": 354877,
"published_at": "2019-04-17T14:29:00+00:00"
}