CVE-2021-3667

moderate-risk
Published 2022-03-02

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.

Do I need to act?

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0.44% chance of exploitation
EPSS score — low exploit probability
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Not on CISA KEV list
No confirmed active exploitation reported to CISA
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Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
6
CVSS 6.5/10 Medium
NETWORK / LOW complexity

Affected Products (4)

Affected Vendors

Debian Redhat Netapp

References (12)

Issue Tracking https://bugzilla.redhat.com/show_bug.cgi?id=1986094
Patch https://gitlab.com/libvirt/libvirt/-/commit/447f69dec47e1b0bd15ecd7cd49a9fd3b050...
Patch https://libvirt.org/git/?p=libvirt.git%3Ba=commit%3Bh=447f69dec47e1b0bd15ecd7cd4...
Mailing List https://lists.debian.org/debian-lts-announce/2024/04/msg00000.html
Third Party Advisory https://security.gentoo.org/glsa/202210-06
Third Party Advisory https://security.netapp.com/advisory/ntap-20220331-0005/
Issue Tracking https://bugzilla.redhat.com/show_bug.cgi?id=1986094
Patch https://gitlab.com/libvirt/libvirt/-/commit/447f69dec47e1b0bd15ecd7cd49a9fd3b050...
Patch https://libvirt.org/git/?p=libvirt.git%3Ba=commit%3Bh=447f69dec47e1b0bd15ecd7cd4...
Mailing List https://lists.debian.org/debian-lts-announce/2024/04/msg00000.html
Third Party Advisory https://security.gentoo.org/glsa/202210-06
Third Party Advisory https://security.netapp.com/advisory/ntap-20220331-0005/
36
/ 100
moderate-risk
Severity 24/34 · High
Exploitability 2/34 · Minimal
Exposure 10/34 · Low