DEBIAN-CVE-2026-62943
- Source
- https://security-tracker.debian.org/tracker/CVE-2026-62943
- Import Source
- https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-62943.json
- JSON Data
- https://api.osv.dev/v1/vulns/DEBIAN-CVE-2026-62943
- Upstream
- Published
- 2026-09-18T17:16:59Z
- Modified
- 2026-09-20T20:00:07Z
- Severity
-
- 8.7 (High) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X CVSS Calculator
- Summary
- [none]
- Details
-
btrbk is a tool for creating snapshots and remote backups of Btrfs subvolumes. From 0.29.0 until 0.32.7, btrbk's ssh_filter_btrbk.sh constructs allow_stream_match with a start anchor but without an end-of-string anchor for the complete command. A user restricted through an authorized_keys forced command can append a trailing pipe command after a valid btrbk command prefix, bypassing the allowlist and executing arbitrary commands with the privileges of the backup-target SSH account. Deployments that do not use ssh_filter_btrbk.sh in authorized_keys are not affected. This issue is fixed in version 0.32.7.
- References
Affected packages
Debian:12 / btrbk
Package
- Name
- btrbk
- Purl
- pkg:deb/debian/btrbk?arch=source&distro=bookworm
Debian:13 / btrbk
Package
- Name
- btrbk
- Purl
- pkg:deb/debian/btrbk?arch=source&distro=trixie
Debian:14 / btrbk
Package
- Name
- btrbk
- Purl
- pkg:deb/debian/btrbk?arch=source&distro=forky