CVE-2021-3667

Description

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.

Category

6.5
CVSS
Severity: Medium
CVSS 3.1 •
CVSS 2.0 •
EPSS 0.25%
Vendor Advisory gentoo.org Vendor Advisory redhat.com
Affected: n/a libvirt
Published at:
Updated at:

References

Link Tags
https://bugzilla.redhat.com/show_bug.cgi?id=1986094 issue tracking vendor advisory
https://libvirt.org/git/?p=libvirt.git%3Ba=commit%3Bh=447f69dec47e1b0bd15ecd7cd49a9fd3b050fb87 patch
https://gitlab.com/libvirt/libvirt/-/commit/447f69dec47e1b0bd15ecd7cd49a9fd3b050fb87 third party advisory patch
https://security.netapp.com/advisory/ntap-20220331-0005/ third party advisory
https://security.gentoo.org/glsa/202210-06 third party advisory vendor advisory
https://lists.debian.org/debian-lts-announce/2024/04/msg00000.html third party advisory mailing list

Frequently Asked Questions

What is the severity of CVE-2021-3667?
CVE-2021-3667 has been scored as a medium severity vulnerability.
How to fix CVE-2021-3667?
To fix CVE-2021-3667, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2021-3667 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2021-3667 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2021-3667?
CVE-2021-3667 affects n/a libvirt.
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