Path traversal via Btrfs optimized-backup subvolumes[].path enables root file/dir manipulation in LXD
28Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 9.9epss 0.5%
exploitation probability
0.5%top 58% of all CVEs
observed exploitation
nono source reports it
Path traversal in the Btrfs storage driver (unpackVolume) in Canonical LXD on Linux allows an authenticated user with instance creation privileges to delete or replace arbitrary files and directories on the host filesystem as root via a crafted subvolumes[].path entry in backup/optimized_header.yaml during a btrfs optimized backup import.
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
Affected products
Canonical · LXDReferences
https://github.com/canonical/lxd-private/pull/103https://github.com/canonical/lxd-private/pull/104https://github.com/canonical/lxd-private/pull/105https://github.com/canonical/lxd-private/pull/84https://github.com/canonical/lxd-private/pull/87https://github.com/canonical/lxd/security/advisories/GHSA-h85r-gjgx-g2rv