High
Security advisory
In Yubico pam-u2f 1.0.7, when configured with debug and a custom debug log file is set using debug_file, that file descriptor is not closed when a new process is spawned. This leads to the file descriptor being inherited into the child process; the child process can then read from and write to it. This can leak sensitive information and also, if written to, be used to fill the disk or plant misinformation.
- Products
- Not specified
- Affected versions
- Not specified
- Fixed versions
- Not specified
- CVEs
- CVE-2019-12210
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 31 Oct 2026, 12:28 UTC · Revision 1
Source evidence
In Yubico pam-u2f 1.0.7, when configured with debug and a custom debug log file is set using debug_file, that file descriptor is not closed when a new process is spawned. This leads to the file descriptor being inherited into the child process; the child process can then read from and write to it. This can leak sensitive information and also, if written to, be used to fill the disk or plant misinformation.
osv:CVE-2019-12210
Complete source record
{
"id": "be3c2c20534abf70d9c09a759886f01ac203cdd05a599250a7b74e1b2ce18c97",
"url": "https://osv.dev/vulnerability/CVE-2019-12210",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "CVE-2019-12210",
"summary": "In Yubico pam-u2f 1.0.7, when configured with debug and a custom debug log file is set using debug_file, that file descriptor is not closed when a new process is spawned. This leads to the file descriptor being inherited into the child process; the child process can then read from and write to it. This can leak sensitive information and also, if written to, be used to fill the disk or plant misinformation.",
"evidence": "osv:CVE-2019-12210",
"products": [],
"severity": "high",
"structured": {
"id": "CVE-2019-12210",
"aliases": [
"CVE-2019-12210"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N"
}
],
"affected": [
{
"ranges": [
{
"repo": "https://github.com/yubico/pam-u2f",
"type": "GIT",
"events": [
{
"introduced": "0"
},
{
"fixed": "18b1914e32b74ff52000f10e97067e841e5fff62"
}
],
"database_specific": {
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{
"range": [
{
"fixed": "18b1914e32b74ff52000f10e97067e841e5fff62"
}
],
"source": "REFERENCES_COMMIT"
}
]
}
}
],
"versions": [
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"pam_u2f-1.0.6",
"pam_u2f-1.0.5",
"pam_u2f-1.0.4",
"pam_u2f-1.0.3",
"pam_u2f-1.0.2",
"pam_u2f-1.0.1",
"pam_u2f-1.0.0",
"pam_u2f-0.0.1",
"pam_u2f-0.0.0"
],
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2019-12210.json",
"vanir_signatures": [
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"digest": {
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"function_hash": "189549074423305318278192686640012163201"
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"source": "https://github.com/yubico/pam-u2f/commit/18b1914e32b74ff52000f10e97067e841e5fff62",
"target": {
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"function": "pam_sm_authenticate"
},
"deprecated": false,
"signature_type": "Function",
"signature_version": "v1"
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{
"id": "CVE-2019-12210-0f862f88",
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"source": "https://github.com/yubico/pam-u2f/commit/18b1914e32b74ff52000f10e97067e841e5fff62",
"target": {
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"function": "parse_cfg"
},
"deprecated": false,
"signature_type": "Function",
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{
"id": "CVE-2019-12210-129a38bf",
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"source": "https://github.com/yubico/pam-u2f/commit/18b1914e32b74ff52000f10e97067e841e5fff62",
"target": {
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"deprecated": false,
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{
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"source": "https://github.com/yubico/pam-u2f/commit/18b1914e32b74ff52000f10e97067e841e5fff62",
"target": {
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},
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{
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"source": "https://github.com/yubico/pam-u2f/commit/18b1914e32b74ff52000f10e97067e841e5fff62",
"target": {
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},
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"signature_type": "Line",
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{
"id": "CVE-2019-12210-d996c8db",
"digest": {
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"function_hash": "14975102232140488356628508058481157351"
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"source": "https://github.com/yubico/pam-u2f/commit/18b1914e32b74ff52000f10e97067e841e5fff62",
"target": {
"file": "util.c",
"function": "get_devices_from_authfile"
},
"deprecated": false,
"signature_type": "Function",
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"vanir_signatures_modified": "2026-10-20T13:39:47Z"
}
}
],
"modified": "2026-10-20T13:39:47.010571724Z",
"provider": "osv",
"references": [
"https://developers.yubico.com/pam-u2f/Release_Notes.html",
"https://github.com/Yubico/pam-u2f/commit/18b1914e32b74ff52000f10e97067e841e5fff62"
],
"provider_metadata": {
"unresolved_ranges": [
{
"cpes": [
"cpe:2.3:a:yubico:pam-u2f:1.0.7:*:*:*:*:*:*:*"
],
"vendor_product": "yubico:pam-u2f",
"extracted_events": [
{
"range": [
{
"introduced": "1.0.7"
},
{
"last_affected": "1.0.7"
}
],
"source": "CPE_STRING"
}
]
}
]
}
},
"related_cves": [
{
"value": "CVE-2019-12210",
"evidence": "/id"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 387925,
"published_at": "2019-06-04T21:29:00.827+00:00"
}