HighFix available
openldap — security advisory
A NULL pointer dereference was found in OpenLDAP server and was fixed in openldap 2.4.55, during a request for renaming RDNs. An unauthenticated attacker could remotely crash the slapd process by sending a specially crafted request, causing a Denial of Service.
- Products
- openldap
- Affected versions
- Not specified
- Fixed versions
- 2.4.48-r2, 2.4.48-r3, 2.4.50-r1
- CVEs
- CVE-2020-25692
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 1 Nov 2026, 12:08 UTC · Revision 1
Source evidence
A NULL pointer dereference was found in OpenLDAP server and was fixed in openldap 2.4.55, during a request for renaming RDNs. An unauthenticated attacker could remotely crash the slapd process by sending a specially crafted request, causing a Denial of Service.
osv:ALPINE-CVE-2020-25692
openldap
Fixed versions: 2.4.48-r2
openldap
Fixed versions: 2.4.48-r3
openldap
Fixed versions: 2.4.50-r1
openldap
Fixed versions: 2.4.48-r2
Complete source record
{
"id": "2ec404a726a51506c0a5d552562f325a2e9319790d7267bb912bba90a9cae904",
"url": "https://osv.dev/vulnerability/ALPINE-CVE-2020-25692",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "ALPINE-CVE-2020-25692",
"summary": "A NULL pointer dereference was found in OpenLDAP server and was fixed in openldap 2.4.55, during a request for renaming RDNs. An unauthenticated attacker could remotely crash the slapd process by sending a specially crafted request, causing a Denial of Service.",
"evidence": "osv:ALPINE-CVE-2020-25692",
"products": [
{
"name": {
"value": "openldap",
"evidence": "/affected/0/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "2.4.48-r2",
"evidence": "/affected/0/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "openldap",
"evidence": "/affected/1/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "2.4.48-r3",
"evidence": "/affected/1/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "openldap",
"evidence": "/affected/2/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "2.4.50-r1",
"evidence": "/affected/2/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "openldap",
"evidence": "/affected/3/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "2.4.48-r2",
"evidence": "/affected/3/ranges"
}
],
"affected_versions": []
}
],
"severity": "high",
"structured": {
"id": "ALPINE-CVE-2020-25692",
"aliases": [
"ALPINE-CVE-2020-25692"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"
}
],
"affected": [
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "2.4.48-r2"
}
]
}
],
"package": {
"name": "openldap",
"purl": "pkg:apk/alpine/openldap?arch=source",
"ecosystem": "Alpine:v3.10"
},
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2020-25692.json"
},
"ecosystem_specific": {}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "2.4.48-r3"
}
]
}
],
"package": {
"name": "openldap",
"purl": "pkg:apk/alpine/openldap?arch=source",
"ecosystem": "Alpine:v3.11"
},
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2020-25692.json"
},
"ecosystem_specific": {}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "2.4.50-r1"
}
]
}
],
"package": {
"name": "openldap",
"purl": "pkg:apk/alpine/openldap?arch=source",
"ecosystem": "Alpine:v3.12"
},
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2020-25692.json"
},
"ecosystem_specific": {}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "2.4.48-r2"
}
]
}
],
"package": {
"name": "openldap",
"purl": "pkg:apk/alpine/openldap?arch=source",
"ecosystem": "Alpine:v3.9"
},
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2020-25692.json"
},
"ecosystem_specific": {}
}
],
"modified": "2026-10-26T11:17:55.157238083Z",
"provider": "osv",
"upstream": [
"CVE-2020-25692"
],
"references": [
"https://security.alpinelinux.org/vuln/CVE-2020-25692"
]
},
"related_cves": [
{
"value": "CVE-2020-25692",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 450557,
"published_at": "2020-12-08T01:15:12.133+00:00"
}