ubuntu-cve-2021-3667
Vulnerability from osv_ubuntu
Published
2022-03-02 23:15
Modified
2026-04-22 07:39
Summary
Details
An improper locking issue was found in the virStoragePoolLookupByTargetPath API of libvirt. It occurs in the storagePoolLookupByTargetPath function where a locked virStoragePoolObj object is not properly released on ACL permission failure. Clients connecting to the read-write socket with limited ACL permissions could use this flaw to acquire the lock and prevent other users from accessing storage pool/volume APIs, resulting in a denial of service condition. The highest threat from this vulnerability is to system availability.
Severity
6.5 (Medium)
N/A (UNKNOWN)
References
| URL | Type | |
|---|---|---|
{
"affected": [
{
"ecosystem_specific": {
"availability": "No subscription required",
"binaries": [
{
"binary_name": "libnss-libvirt",
"binary_version": "6.0.0-0ubuntu8.16"
},
{
"binary_name": "libvirt-clients",
"binary_version": "6.0.0-0ubuntu8.16"
},
{
"binary_name": "libvirt-daemon",
"binary_version": "6.0.0-0ubuntu8.16"
},
{
"binary_name": "libvirt-daemon-driver-lxc",
"binary_version": "6.0.0-0ubuntu8.16"
},
{
"binary_name": "libvirt-daemon-driver-qemu",
"binary_version": "6.0.0-0ubuntu8.16"
},
{
"binary_name": "libvirt-daemon-driver-storage-gluster",
"binary_version": "6.0.0-0ubuntu8.16"
},
{
"binary_name": "libvirt-daemon-driver-storage-rbd",
"binary_version": "6.0.0-0ubuntu8.16"
},
{
"binary_name": "libvirt-daemon-driver-storage-zfs",
"binary_version": "6.0.0-0ubuntu8.16"
},
{
"binary_name": "libvirt-daemon-driver-vbox",
"binary_version": "6.0.0-0ubuntu8.16"
},
{
"binary_name": "libvirt-daemon-driver-xen",
"binary_version": "6.0.0-0ubuntu8.16"
},
{
"binary_name": "libvirt-daemon-system",
"binary_version": "6.0.0-0ubuntu8.16"
},
{
"binary_name": "libvirt-daemon-system-systemd",
"binary_version": "6.0.0-0ubuntu8.16"
},
{
"binary_name": "libvirt-daemon-system-sysv",
"binary_version": "6.0.0-0ubuntu8.16"
},
{
"binary_name": "libvirt-sanlock",
"binary_version": "6.0.0-0ubuntu8.16"
},
{
"binary_name": "libvirt-wireshark",
"binary_version": "6.0.0-0ubuntu8.16"
},
{
"binary_name": "libvirt0",
"binary_version": "6.0.0-0ubuntu8.16"
}
]
},
"package": {
"ecosystem": "Ubuntu:20.04:LTS",
"name": "libvirt",
"purl": "pkg:deb/ubuntu/libvirt@6.0.0-0ubuntu8.16?arch=source\u0026distro=focal"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "6.0.0-0ubuntu8.16"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"5.4.0-0ubuntu5",
"6.0.0-0ubuntu1",
"6.0.0-0ubuntu2",
"6.0.0-0ubuntu3",
"6.0.0-0ubuntu4",
"6.0.0-0ubuntu5",
"6.0.0-0ubuntu6",
"6.0.0-0ubuntu7",
"6.0.0-0ubuntu8",
"6.0.0-0ubuntu8.1",
"6.0.0-0ubuntu8.2",
"6.0.0-0ubuntu8.3",
"6.0.0-0ubuntu8.4",
"6.0.0-0ubuntu8.5",
"6.0.0-0ubuntu8.7",
"6.0.0-0ubuntu8.8",
"6.0.0-0ubuntu8.9",
"6.0.0-0ubuntu8.10",
"6.0.0-0ubuntu8.11",
"6.0.0-0ubuntu8.12",
"6.0.0-0ubuntu8.13",
"6.0.0-0ubuntu8.14",
"6.0.0-0ubuntu8.15"
]
},
{
"ecosystem_specific": {
"availability": "No subscription required",
"binaries": [
{
"binary_name": "libnss-libvirt",
"binary_version": "7.6.0-0ubuntu3"
},
{
"binary_name": "libvirt-clients",
"binary_version": "7.6.0-0ubuntu3"
},
{
"binary_name": "libvirt-daemon",
"binary_version": "7.6.0-0ubuntu3"
},
{
"binary_name": "libvirt-daemon-config-network",
"binary_version": "7.6.0-0ubuntu3"
},
{
"binary_name": "libvirt-daemon-config-nwfilter",
"binary_version": "7.6.0-0ubuntu3"
},
{
"binary_name": "libvirt-daemon-driver-lxc",
"binary_version": "7.6.0-0ubuntu3"
},
{
"binary_name": "libvirt-daemon-driver-qemu",
"binary_version": "7.6.0-0ubuntu3"
},
{
"binary_name": "libvirt-daemon-driver-storage-gluster",
"binary_version": "7.6.0-0ubuntu3"
},
{
"binary_name": "libvirt-daemon-driver-storage-iscsi-direct",
"binary_version": "7.6.0-0ubuntu3"
},
{
"binary_name": "libvirt-daemon-driver-storage-rbd",
"binary_version": "7.6.0-0ubuntu3"
},
{
"binary_name": "libvirt-daemon-driver-storage-zfs",
"binary_version": "7.6.0-0ubuntu3"
},
{
"binary_name": "libvirt-daemon-driver-vbox",
"binary_version": "7.6.0-0ubuntu3"
},
{
"binary_name": "libvirt-daemon-driver-xen",
"binary_version": "7.6.0-0ubuntu3"
},
{
"binary_name": "libvirt-daemon-system",
"binary_version": "7.6.0-0ubuntu3"
},
{
"binary_name": "libvirt-daemon-system-systemd",
"binary_version": "7.6.0-0ubuntu3"
},
{
"binary_name": "libvirt-daemon-system-sysv",
"binary_version": "7.6.0-0ubuntu3"
},
{
"binary_name": "libvirt-login-shell",
"binary_version": "7.6.0-0ubuntu3"
},
{
"binary_name": "libvirt-sanlock",
"binary_version": "7.6.0-0ubuntu3"
},
{
"binary_name": "libvirt-wireshark",
"binary_version": "7.6.0-0ubuntu3"
},
{
"binary_name": "libvirt0",
"binary_version": "7.6.0-0ubuntu3"
}
]
},
"package": {
"ecosystem": "Ubuntu:22.04:LTS",
"name": "libvirt",
"purl": "pkg:deb/ubuntu/libvirt@7.6.0-0ubuntu3?arch=source\u0026distro=jammy"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "7.6.0-0ubuntu3"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"7.6.0-0ubuntu1"
]
}
],
"aliases": [],
"details": "An improper locking issue was found in the virStoragePoolLookupByTargetPath API of libvirt. It occurs in the storagePoolLookupByTargetPath function where a locked virStoragePoolObj object is not properly released on ACL permission failure. Clients connecting to the read-write socket with limited ACL permissions could use this flaw to acquire the lock and prevent other users from accessing storage pool/volume APIs, resulting in a denial of service condition. The highest threat from this vulnerability is to system availability.",
"id": "UBUNTU-CVE-2021-3667",
"modified": "2026-04-22T07:39:48Z",
"published": "2022-03-02T23:15:00Z",
"references": [
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2021-3667"
},
{
"type": "ADVISORY",
"url": "https://ubuntu.com/security/notices/USN-5399-1"
},
{
"type": "REPORT",
"url": "https://www.cve.org/CVERecord?id=CVE-2021-3667"
}
],
"related": [
"USN-5399-1"
],
"schema_version": "1.7.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
},
{
"score": "low",
"type": "Ubuntu"
}
],
"upstream": [
"CVE-2021-3667"
]
}
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
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