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Vulnerability record · CVE-2021-3020 · published 26 August 2022

CVE-2021-3020: Clusterlabs hawk improper privilege management vulnerability

Clusterlabs · Hawk

An issue was discovered in ClusterLabs Hawk (aka HA Web Konsole) through 2.3.0-15. It ships the binary hawk_invoke (built from tools/hawk_invoke.c), intended to be used as a setuid program. This allows the hacluster user to invoke certain commands as root (with an attempt to limit this to safe combinations). This user is able to execute an interactive "shell" that isn't limited to the commands specified in hawk_invoke, allowing escalation to root.

8.8 CVSS 3.1 High EPSS 1.2% · top 32.3% CWE-269 · Improper privilege management
8.8CVSS 3.1 base score
1.2%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
6References
17 Jun 2026Last modified by NVD

Description

An issue was discovered in ClusterLabs Hawk (aka HA Web Konsole) through 2.3.0-15. It ships the binary hawk_invoke (built from tools/hawk_invoke.c), intended to be used as a setuid program. This allows the hacluster user to invoke certain commands as root (with an attempt to limit this to safe combinations). This user is able to execute an interactive "shell" that isn't limited to the commands specified in hawk_invoke, allowing escalation to root.

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://bugzilla.suse.com/show_bug.cgi?id=1180571 Permissions Required
https://github.com/ClusterLabs/crmsh/commit/c538024b8ebd138dc373b005189471d9b77e9c82 PatchThird Party Advisory
https://github.com/ClusterLabs/hawk/releases Release NotesThird Party Advisory
https://bugzilla.suse.com/show_bug.cgi?id=1180571 Permissions Required
https://github.com/ClusterLabs/crmsh/commit/c538024b8ebd138dc373b005189471d9b77e9c82 PatchThird Party Advisory
https://github.com/ClusterLabs/hawk/releases Release NotesThird Party Advisory

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Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2021-3020), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.