CriticalFix available
linux-pam — security advisory
A flaw was found in Linux-Pam in versions prior to 1.5.1 in the way it handle empty passwords for non-existing users. When the user doesn't exist PAM try to authenticate with root and in the case of an empty password it successfully authenticate.
- Products
- linux-pam
- Affected versions
- Not specified
- Fixed versions
- 1.5.1, 1.5.1-r0
- CVEs
- CVE-2020-27780
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 1 Nov 2026, 12:09 UTC · Revision 1
Source evidence
A flaw was found in Linux-Pam in versions prior to 1.5.1 in the way it handle empty passwords for non-existing users. When the user doesn't exist PAM try to authenticate with root and in the case of an empty password it successfully authenticate.
osv:ALPINE-CVE-2020-27780
linux-pam
Fixed versions: 1.5.1
linux-pam
Fixed versions: 1.5.1-r0
linux-pam
Fixed versions: 1.5.1-r0
linux-pam
Fixed versions: 1.5.1-r0
linux-pam
Fixed versions: 1.5.1-r0
linux-pam
Fixed versions: 1.5.1-r0
linux-pam
Fixed versions: 1.5.1-r0
linux-pam
Fixed versions: 1.5.1-r0
linux-pam
Fixed versions: 1.5.1-r0
linux-pam
Fixed versions: 1.5.1-r0
linux-pam
Fixed versions: 1.5.1-r0
linux-pam
Fixed versions: 1.5.1-r0
Complete source record
{
"id": "c16085fafe765651a0baffbe752a8d4076df27480eefe1d55f3174a8482796a1",
"url": "https://osv.dev/vulnerability/ALPINE-CVE-2020-27780",
"method": "structured",
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"title": "ALPINE-CVE-2020-27780",
"summary": "A flaw was found in Linux-Pam in versions prior to 1.5.1 in the way it handle empty passwords for non-existing users. When the user doesn't exist PAM try to authenticate with root and in the case of an empty password it successfully authenticate.",
"evidence": "osv:ALPINE-CVE-2020-27780",
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{
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"evidence": "/affected/0/package/name"
},
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{
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{
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{
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{
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"severity": "critical",
"structured": {
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"aliases": [
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],
"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": [
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{
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],
"package": {
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"ecosystem": "Alpine:v3.13"
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"database_specific": {
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},
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"package": {
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"ecosystem": "Alpine:v3.15"
},
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"package": {
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"ecosystem": "Alpine:v3.16"
},
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"package": {
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"purl": "pkg:apk/alpine/linux-pam?arch=source",
"ecosystem": "Alpine:v3.18"
},
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"package": {
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"purl": "pkg:apk/alpine/linux-pam?arch=source",
"ecosystem": "Alpine:v3.19"
},
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"package": {
"name": "linux-pam",
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"ecosystem": "Alpine:v3.20"
},
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],
"package": {
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"ecosystem": "Alpine:v3.21"
},
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],
"modified": "2026-10-26T11:17:55.163271128Z",
"provider": "osv",
"upstream": [
"CVE-2020-27780"
],
"references": [
"https://security.alpinelinux.org/vuln/CVE-2020-27780"
]
},
"related_cves": [
{
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"evidence": "/upstream"
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],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 450581,
"published_at": "2020-12-18T00:15:14.33+00:00"
}