CVE-2021-3667
Published: 2 March 2022
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.
Notes
Author | Note |
---|---|
mdeslaur | issue introduced in 4.1 |
Priority
Status
Package | Release | Status |
---|---|---|
libvirt Launchpad, Ubuntu, Debian |
bionic |
Not vulnerable
(code not present)
|
focal |
Released
(6.0.0-0ubuntu8.16)
|
|
hirsute |
Ignored
(end of life)
|
|
impish |
Not vulnerable
(7.6.0-0ubuntu1)
|
|
jammy |
Released
(7.6.0-0ubuntu3)
|
|
trusty |
Not vulnerable
(code not present)
|
|
upstream |
Released
(7.6.0-1)
|
|
xenial |
Not vulnerable
(code not present)
|
|
Patches: upstream: https://github.com/libvirt/libvirt/commit/447f69dec47e1b0bd15ecd7cd49a9fd3b050fb87 |
Severity score breakdown
Parameter | Value |
---|---|
Base score | 6.5 |
Attack vector | Network |
Attack complexity | Low |
Privileges required | Low |
User interaction | None |
Scope | Unchanged |
Confidentiality | None |
Integrity impact | None |
Availability impact | High |
Vector | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |