CVE-2021-38173

Btrbk before 0.31.2 allows command execution because of the mishandlin ...

Published 7 Aug 2021Modified 17 Jun 2026CWE 77

In the Trivy database since at least 24 Oct 2026, 07:11 UTCWhen it arrived before that build is not recorded.

Severity by source

NVD9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Trivy's own label is CRITICAL. Rated critical by NVD. Rated lower by Ubuntu (medium).

Description

Btrbk before 0.31.2 allows command execution because of the mishandling of remote hosts filtering SSH commands using ssh_filter_btrbk.sh in authorized_keys.

Affected packages and fixed versions

Source	Package	Fixed in
debian 10	btrbk	0.27.1-1+deb10u1
debian 11	btrbk	0.27.1-1.1+deb11u1
debian 12	btrbk	0.27.1-2
debian 13	btrbk	0.27.1-2
debian 14	btrbk	0.27.1-2
debian 9	btrbk	0.24.0-1+deb9u1
echo	btrbk	0.27.1-2
ubuntu 18.04-ESM	btrbk	no fix listed
ubuntu 20.04-ESM	btrbk	no fix listed

References

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Vulnerability data compiled from the Trivy vulnerability database (trivy-db, Aqua Security, Apache License 2.0), which aggregates third-party advisories. CVE records are published by The MITRE Corporation under the CVE Terms of Use; CVE is a trademark of MITRE. This product uses data from the NVD API but is not endorsed or certified by the NVD. Severity, titles and advisory data from the GitHub Advisory Database (CC BY 4.0), Red Hat security data (CC BY 4.0) and the other sources linked on each entry. Entries may be summarised or re-formatted; the linked original is the authoritative record.