Description (CNA)
Canonical LXD versions 4.12 through 6.7 contain an incomplete denylist in isVMLowLevelOptionForbidden (lxd/project/limits/permissions.go), which omits raw.apparmor and raw.qemu.conf from the set of keys blocked under the restricted.virtual-machines.lowlevel=block project restriction. A remote attacker with can_edit permission on a VM instance in a restricted project can inject an AppArmor rule and a QEMU chardev configuration that bridges the LXD Unix socket into the guest VM, enabling privilege escalation to LXD cluster administrator and subsequently to host root.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Canonical / lxd | affected 4.12.0 before 5.0.7; affected 5.1.0 before 5.21.5; affected 6.0.0 before 6.8.0 |
CWE
CWE-184
References
- https://github.com/canonical/lxd/security/advisories/GHSA-fm2x-c5qw-4h6f
- https://github.com/canonical/lxd/pull/17909
ADP enrichment
No English description supplied.