VulnerabilityModified

CVE-2021-38173

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.

CRITICAL 9.8EPSS 3.16%

Does this matter?

High impact if exploited, but EPSS currently rates exploitation as unlikely (3.16%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.

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.

CVSS 3.1: 9.8 CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS: 3.16% probability · 87th percentile
CISA KEV: Not listed
Weakness: CWE-77
Affected: digint/btrbk · debian/debian linux · fedoraproject/fedora
Source: cve@mitre.org

References

https://github.com/digint/btrbk/blob/master/ChangeLogRelease Notes, Third Party Advisory
https://github.com/digint/btrbk/commit/58212de771c381cd4fa05625927080bf264e9584Patch, Third Party Advisory
https://lists.debian.org/debian-lts-announce/2021/09/msg00002.htmlMailing List, Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/BP2T32JMENJFRP2HWXR7FTTZVRTTPECL/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/LM7GLTUN5YS4KE2RNBX732EAMVVGNEX3/
https://github.com/digint/btrbk/blob/master/ChangeLogRelease Notes, Third Party Advisory
https://github.com/digint/btrbk/commit/58212de771c381cd4fa05625927080bf264e9584Patch, Third Party Advisory
https://lists.debian.org/debian-lts-announce/2021/09/msg00002.htmlMailing List, Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/BP2T32JMENJFRP2HWXR7FTTZVRTTPECL/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/LM7GLTUN5YS4KE2RNBX732EAMVVGNEX3/

Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.