A privilege escalation vulnerability exists in LXD from 6.0 before 6.9, 5.21.0 before 5.21.5, and 5.0.0 before 5.0.7 regarding the handling of project-restriction policies during snapshot restoration.. An authenticated project operator in a restricted multi-tenant environment can bypass policy restrictions by importing a maliciously crafted instance backup containing restricted configuration keys within a snapshot. When the snapshot is restored, these restricted keys are applied to the live instance without policy validation.
Starting the modified instance grants the operator unauthorized host root access.
Attack Parameters
Attack Vector
Network
Can be exploited remotely
Attack Complexity
Low
Easy to exploit
Privileges Required
High
Admin 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 3
| Configuration | From (including) | Up to (excluding) |
|---|---|---|
|
Canonical Lxd
cpe:2.3:a:canonical:lxd:*:*:*:*:*:*:*:*
|
4.12
|
5.0.7
|
|
Canonical Lxd
cpe:2.3:a:canonical:lxd:*:*:*:*:*:*:*:*
|
5.21.0
|
5.21.5
|
|
Canonical Lxd
cpe:2.3:a:canonical:lxd:*:*:*:*:*:*:*:*
|
6.0
|
6.9
|