Medium
refpolicy — security advisory
An issue was discovered in the selinux-policy (aka Reference Policy) package 3.14 through 2020-08-24 because the .config/Yubico directory is mishandled. Consequently, when SELinux is in enforced mode, pam-u2f is not allowed to read the user's U2F configuration file. If configured with the nouserok option (the default when configured by the authselect tool), and that file cannot be read, the second factor is disabled. An attacker with only the knowledge of the password can then log in, bypassing 2FA.
- Products
- refpolicy
- Affected versions
- 2:2.20110726-12, 2:2.20110726-13, 2:2.20131214-1, 2:2.20140206-1, 2:2.20140421-9, 2:2.20161023.1-10, 2:2.20161023.1-9, 2:2.20171228-1, 2:2.20180114-1, 2:2.20190201-4, 2:2.20190201-5, 2:2.20190201-6, 2:2.20190201-7, 2:2.20190201-8, 2:2.20210203-10, 2:2.20210203-7, 2:2.20210203-9, 2:2.20230929-1, 2:2.20231010-1, 2:2.20231119-1, 2:2.20231119-2, 2:2.20240202-1, 2:2.20241211-2, 2:2.20250213-10, 2:2.20250213-11, 2:2.20250213-13, 2:2.20250213-5, 2:2.20250213-6, 2:2.20250213-7, 2:2.20250213-8, 2:2.20250213-9, 2:2.20260804-1, 2:2.20260929-1
- Fixed versions
- Not specified
- CVEs
- CVE-2020-24612
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 31 Oct 2026, 01:29 UTC · Revision 1
Source evidence
An issue was discovered in the selinux-policy (aka Reference Policy) package 3.14 through 2020-08-24 because the .config/Yubico directory is mishandled. Consequently, when SELinux is in enforced mode, pam-u2f is not allowed to read the user's U2F configuration file. If configured with the nouserok option (the default when configured by the authselect tool), and that file cannot be read, the second factor is disabled. An attacker with only the knowledge of the password can then log in, bypassing 2FA.
osv:UBUNTU-CVE-2020-24612
refpolicy
Fixed versions: Not specified
refpolicy
Fixed versions: Not specified
refpolicy
Fixed versions: Not specified
refpolicy
Fixed versions: Not specified
refpolicy
Fixed versions: Not specified
refpolicy
Fixed versions: Not specified
refpolicy
Fixed versions: Not specified
refpolicy
Fixed versions: Not specified
refpolicy
Fixed versions: Not specified
Complete source record
{
"id": "bf3e641c209b3ce37285e1a35f5d4758fc0a3822a56e15504ed6ec9dec5ac890",
"url": "https://osv.dev/vulnerability/UBUNTU-CVE-2020-24612",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "UBUNTU-CVE-2020-24612",
"summary": "An issue was discovered in the selinux-policy (aka Reference Policy) package 3.14 through 2020-08-24 because the .config/Yubico directory is mishandled. Consequently, when SELinux is in enforced mode, pam-u2f is not allowed to read the user's U2F configuration file. If configured with the nouserok option (the default when configured by the authselect tool), and that file cannot be read, the second factor is disabled. An attacker with only the knowledge of the password can then log in, bypassing 2FA.",
"evidence": "osv:UBUNTU-CVE-2020-24612",
"products": [
{
"name": {
"value": "refpolicy",
"evidence": "/affected/0/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "2:2.20110726-12",
"evidence": "/affected/0/versions"
},
{
"value": "2:2.20110726-13",
"evidence": "/affected/0/versions"
},
{
"value": "2:2.20131214-1",
"evidence": "/affected/0/versions"
},
{
"value": "2:2.20140206-1",
"evidence": "/affected/0/versions"
}
]
},
{
"name": {
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"evidence": "/affected/1/package/name"
},
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"affected_versions": [
{
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}
]
},
{
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"evidence": "/affected/2/package/name"
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"affected_versions": [
{
"value": "2:2.20161023.1-9",
"evidence": "/affected/2/versions"
},
{
"value": "2:2.20161023.1-10",
"evidence": "/affected/2/versions"
},
{
"value": "2:2.20171228-1",
"evidence": "/affected/2/versions"
},
{
"value": "2:2.20180114-1",
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}
]
},
{
"name": {
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"evidence": "/affected/3/package/name"
},
"prerequisites": [],
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"affected_versions": [
{
"value": "2:2.20190201-4",
"evidence": "/affected/3/versions"
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{
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"evidence": "/affected/3/versions"
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{
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"evidence": "/affected/3/versions"
},
{
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"evidence": "/affected/3/versions"
},
{
"value": "2:2.20190201-8",
"evidence": "/affected/3/versions"
}
]
},
{
"name": {
"value": "refpolicy",
"evidence": "/affected/4/package/name"
},
"prerequisites": [],
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"affected_versions": [
{
"value": "2:2.20210203-7",
"evidence": "/affected/4/versions"
},
{
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"evidence": "/affected/4/versions"
},
{
"value": "2:2.20210203-10",
"evidence": "/affected/4/versions"
}
]
},
{
"name": {
"value": "refpolicy",
"evidence": "/affected/5/package/name"
},
"prerequisites": [],
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"affected_versions": [
{
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{
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"evidence": "/affected/5/versions"
},
{
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"evidence": "/affected/5/versions"
},
{
"value": "2:2.20231119-2",
"evidence": "/affected/5/versions"
},
{
"value": "2:2.20240202-1",
"evidence": "/affected/5/versions"
}
]
},
{
"name": {
"value": "refpolicy",
"evidence": "/affected/6/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "2:2.20241211-2",
"evidence": "/affected/6/versions"
},
{
"value": "2:2.20250213-5",
"evidence": "/affected/6/versions"
},
{
"value": "2:2.20250213-6",
"evidence": "/affected/6/versions"
},
{
"value": "2:2.20250213-7",
"evidence": "/affected/6/versions"
},
{
"value": "2:2.20250213-8",
"evidence": "/affected/6/versions"
},
{
"value": "2:2.20250213-9",
"evidence": "/affected/6/versions"
},
{
"value": "2:2.20250213-10",
"evidence": "/affected/6/versions"
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]
},
{
"name": {
"value": "refpolicy",
"evidence": "/affected/7/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "2:2.20250213-11",
"evidence": "/affected/7/versions"
},
{
"value": "2:2.20250213-13",
"evidence": "/affected/7/versions"
},
{
"value": "2:2.20260804-1",
"evidence": "/affected/7/versions"
},
{
"value": "2:2.20260929-1",
"evidence": "/affected/7/versions"
}
]
},
{
"name": {
"value": "refpolicy",
"evidence": "/affected/8/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "2:2.20250213-10",
"evidence": "/affected/8/versions"
},
{
"value": "2:2.20250213-11",
"evidence": "/affected/8/versions"
}
]
}
],
"severity": "medium",
"structured": {
"id": "UBUNTU-CVE-2020-24612",
"aliases": [
"UBUNTU-CVE-2020-24612"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N"
},
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N"
},
{
"type": "Ubuntu",
"score": "low"
}
],
"affected": [
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "refpolicy",
"purl": "pkg:deb/ubuntu/refpolicy?arch=source&distro=trusty",
"ecosystem": "Ubuntu:14.04:LTS"
},
"versions": [
"2:2.20110726-12",
"2:2.20110726-13",
"2:2.20131214-1",
"2:2.20140206-1"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2020/UBUNTU-CVE-2020-24612.json"
},
"ecosystem_specific": {
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{
"binary_name": "selinux-policy-default",
"binary_version": "2:2.20140206-1"
},
{
"binary_name": "selinux-policy-mls",
"binary_version": "2:2.20140206-1"
},
{
"binary_name": "selinux-policy-src",
"binary_version": "2:2.20140206-1"
}
]
}
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{
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},
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"2:2.20140421-9"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2020/UBUNTU-CVE-2020-24612.json"
},
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"binary_version": "2:2.20140421-9"
},
{
"binary_name": "selinux-policy-mls",
"binary_version": "2:2.20140421-9"
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"binary_name": "selinux-policy-src",
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}
]
}
},
{
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],
"package": {
"name": "refpolicy",
"purl": "pkg:deb/ubuntu/refpolicy?arch=source&distro=bionic",
"ecosystem": "Ubuntu:18.04:LTS"
},
"versions": [
"2:2.20161023.1-9",
"2:2.20161023.1-10",
"2:2.20171228-1",
"2:2.20180114-1"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2020/UBUNTU-CVE-2020-24612.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "selinux-policy-default",
"binary_version": "2:2.20180114-1"
},
{
"binary_name": "selinux-policy-mls",
"binary_version": "2:2.20180114-1"
},
{
"binary_name": "selinux-policy-src",
"binary_version": "2:2.20180114-1"
}
]
}
},
{
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},
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{
"binary_name": "selinux-policy-mls",
"binary_version": "2:2.20190201-8"
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{
"binary_name": "selinux-policy-src",
"binary_version": "2:2.20190201-8"
}
]
}
},
{
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],
"package": {
"name": "refpolicy",
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"ecosystem": "Ubuntu:22.04:LTS"
},
"versions": [
"2:2.20210203-7",
"2:2.20210203-9",
"2:2.20210203-10"
],
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},
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{
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{
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"package": {
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"ecosystem": "Ubuntu:24.04:LTS"
},
"versions": [
"2:2.20230929-1",
"2:2.20231010-1",
"2:2.20231119-1",
"2:2.20231119-2",
"2:2.20240202-1"
],
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},
"ecosystem_specific": {
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{
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},
{
"binary_name": "selinux-policy-mls",
"binary_version": "2:2.20240202-1"
},
{
"binary_name": "selinux-policy-src",
"binary_version": "2:2.20240202-1"
}
]
}
},
{
"ranges": [
{
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}
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}
],
"package": {
"name": "refpolicy",
"purl": "pkg:deb/ubuntu/refpolicy?arch=source&distro=questing",
"ecosystem": "Ubuntu:25.10"
},
"versions": [
"2:2.20241211-2",
"2:2.20250213-5",
"2:2.20250213-6",
"2:2.20250213-7",
"2:2.20250213-8",
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],
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},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "selinux-policy-default",
"binary_version": "2:2.20250213-10"
},
{
"binary_name": "selinux-policy-mls",
"binary_version": "2:2.20250213-10"
},
{
"binary_name": "selinux-policy-src",
"binary_version": "2:2.20250213-10"
}
]
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
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{
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}
]
}
],
"package": {
"name": "refpolicy",
"purl": "pkg:deb/ubuntu/refpolicy?arch=source&distro=stonking",
"ecosystem": "Ubuntu:26.10"
},
"versions": [
"2:2.20250213-11",
"2:2.20250213-13",
"2:2.20260804-1",
"2:2.20260929-1"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2020/UBUNTU-CVE-2020-24612.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "selinux-policy-default",
"binary_version": "2:2.20260929-1"
},
{
"binary_name": "selinux-policy-mls",
"binary_version": "2:2.20260929-1"
},
{
"binary_name": "selinux-policy-src",
"binary_version": "2:2.20260929-1"
}
]
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "refpolicy",
"purl": "pkg:deb/ubuntu/refpolicy?arch=source&distro=resolute",
"ecosystem": "Ubuntu:26.04:LTS"
},
"versions": [
"2:2.20250213-10",
"2:2.20250213-11"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2020/UBUNTU-CVE-2020-24612.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "selinux-policy-default",
"binary_version": "2:2.20250213-11"
},
{
"binary_name": "selinux-policy-mls",
"binary_version": "2:2.20250213-11"
},
{
"binary_name": "selinux-policy-src",
"binary_version": "2:2.20250213-11"
}
]
}
}
],
"modified": "2026-10-17T12:56:54.955510791Z",
"provider": "osv",
"upstream": [
"CVE-2020-24612"
],
"references": [
"https://ubuntu.com/security/CVE-2020-24612",
"https://bugzilla.redhat.com/show_bug.cgi?id=1860888",
"https://github.com/fedora-selinux/selinux-policy/commit/71e1989028802c7875d3436fd3966c587fa383fb",
"https://www.cve.org/CVERecord?id=CVE-2020-24612"
]
},
"related_cves": [
{
"value": "CVE-2020-24612",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 356528,
"published_at": "2020-08-24T21:15:00+00:00"
}