Medium
libarchive — security advisory
Libarchive through 3.6.2 can cause directories to have world-writable permissions. The umask() call inside archive_write_disk_posix.c changes the umask of the whole process for a very short period of time; a race condition with another thread can lead to a permanent umask 0 setting. Such a race condition could lead to implicit directory creation with permissions 0777 (without the sticky bit), which means that any low-privileged local user can delete and rename files inside those directories.
- Products
- libarchive
- Affected versions
- 3.1.2-11build1, 3.1.2-11ubuntu0.16.04.1, 3.1.2-11ubuntu0.16.04.2, 3.1.2-11ubuntu0.16.04.3, 3.1.2-11ubuntu0.16.04.4, 3.1.2-11ubuntu0.16.04.5, 3.1.2-11ubuntu0.16.04.6, 3.1.2-11ubuntu0.16.04.7, 3.1.2-11ubuntu0.16.04.8, 3.1.2-11ubuntu0.16.04.8+esm1, 3.1.2-11ubuntu0.16.04.8+esm2, 3.1.2-11ubuntu0.16.04.8+esm3, 3.1.2-5ubuntu1, 3.1.2-7ubuntu1, 3.1.2-7ubuntu2, 3.1.2-7ubuntu2.1, 3.1.2-7ubuntu2.2, 3.1.2-7ubuntu2.3, 3.1.2-7ubuntu2.4, 3.1.2-7ubuntu2.6, 3.1.2-7ubuntu2.7, 3.1.2-7ubuntu2.8, 3.1.2-7ubuntu2.8+esm1, 3.1.2-7ubuntu2.8+esm3, 3.1.2-7ubuntu2.8+esm4, 3.1.2-7ubuntu2.8+esm5, 3.2.2-3.1, 3.2.2-3.1ubuntu0.1, 3.2.2-3.1ubuntu0.2, 3.2.2-3.1ubuntu0.3, 3.2.2-3.1ubuntu0.4, 3.2.2-3.1ubuntu0.5, 3.2.2-3.1ubuntu0.6, 3.2.2-3.1ubuntu0.7, 3.2.2-3.1ubuntu0.7+esm1, 3.2.2-3.1ubuntu0.7+esm2, 3.2.2-3.1ubuntu0.7+esm3, 3.4.0-1, 3.4.0-1build1, 3.4.0-1ubuntu2, 3.4.0-2ubuntu1, 3.4.0-2ubuntu1.1, 3.4.0-2ubuntu1.2, 3.4.0-2ubuntu1.3, 3.4.0-2ubuntu1.4, 3.4.0-2ubuntu1.5, 3.4.0-2ubuntu1.5+esm1, 3.4.0-2ubuntu1.5+esm2, 3.4.0-2ubuntu1.5+esm3, 3.4.3-2, 3.4.3-2build1, 3.5.2-1, 3.5.2-1ubuntu1, 3.6.0-1ubuntu1, 3.6.0-1ubuntu1.1, 3.6.0-1ubuntu1.2, 3.6.0-1ubuntu1.3, 3.6.0-1ubuntu1.4, 3.6.0-1ubuntu1.5, 3.6.0-1ubuntu1.6, 3.6.0-1ubuntu1.7, 3.6.0-1ubuntu1.8, 3.6.0-1ubuntu1.9
- Fixed versions
- Not specified
- CVEs
- CVE-2023-30571
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 28 Oct 2026, 10:03 UTC · Revision 1
Source evidence
Libarchive through 3.6.2 can cause directories to have world-writable permissions. The umask() call inside archive_write_disk_posix.c changes the umask of the whole process for a very short period of time; a race condition with another thread can lead to a permanent umask 0 setting. Such a race condition could lead to implicit directory creation with permissions 0777 (without the sticky bit), which means that any low-privileged local user can delete and rename files inside those directories.
osv:UBUNTU-CVE-2023-30571
libarchive
Fixed versions: Not specified
libarchive
Fixed versions: Not specified
libarchive
Fixed versions: Not specified
libarchive
Fixed versions: Not specified
libarchive
Fixed versions: Not specified
Complete source record
{
"id": "19fe6aa57c7d3c1b17d73445be98348d46324b84db37f8162de74a9b17d86ff1",
"url": "https://osv.dev/vulnerability/UBUNTU-CVE-2023-30571",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "UBUNTU-CVE-2023-30571",
"summary": "Libarchive through 3.6.2 can cause directories to have world-writable permissions. The umask() call inside archive_write_disk_posix.c changes the umask of the whole process for a very short period of time; a race condition with another thread can lead to a permanent umask 0 setting. Such a race condition could lead to implicit directory creation with permissions 0777 (without the sticky bit), which means that any low-privileged local user can delete and rename files inside those directories.",
"evidence": "osv:UBUNTU-CVE-2023-30571",
"products": [
{
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"evidence": "/affected/0/versions"
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{
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{
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{
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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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{
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"evidence": "/affected/2/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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{
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{
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"severity": "medium",
"structured": {
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"aliases": [
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],
"metrics": [
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"type": "CVSS_V3",
"score": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:H"
},
{
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"score": "CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:C/C:L/I:L/A:N"
},
{
"type": "Ubuntu",
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},
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"package": {
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"ecosystem": "Ubuntu:22.04:LTS"
},
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"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2023/UBUNTU-CVE-2023-30571.json"
},
"ecosystem_specific": {
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{
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},
{
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}
]
}
}
],
"modified": "2026-10-08T19:46:18.810715496Z",
"provider": "osv",
"upstream": [
"CVE-2023-30571"
],
"references": [
"https://ubuntu.com/security/CVE-2023-30571",
"https://www.cve.org/CVERecord?id=CVE-2023-30571"
]
},
"related_cves": [
{
"value": "CVE-2023-30571",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 104500,
"published_at": "2023-05-29T20:15:00+00:00"
}