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.
Attack Parameters
Attack Vector
Network
Can be exploited remotely
Attack Complexity
Low
Easy to exploit
Privileges Required
Low
Basic privileges needed
User Interaction
None
No user interaction needed
Impact Assessment
Confidentiality
High
Complete data leak
Integrity
High
Complete data modification
Availability
High
Complete denial of service
CVSS Vector v3.1
Weakness Type (CWE)
Vulnerable Products
canonical:lxd
References 6
https://github.com/canonical/lxd-private/pull/103
security@ubuntu.com
https://github.com/canonical/lxd-private/pull/104
security@ubuntu.com
https://github.com/canonical/lxd-private/pull/105
security@ubuntu.com
https://github.com/canonical/lxd-private/pull/84
security@ubuntu.com
https://github.com/canonical/lxd-private/pull/87
security@ubuntu.com
https://github.com/canonical/lxd/security/advisories/GHSA-h85r-gjgx-g2rv
security@ubuntu.com