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GHSA-2j9v-p4xj-cjw2
github.com/lima-vm/lima/v2Impact
On an instance of Lima running with qemu driver, an arbitrary user in the VM could access /run/lima-guestagent.sock when the guest agent is enabled.
This could result in running an arbitrary command with the root privileges in the VM (not on the host), as lima-guestagent.sock provides the tunneling service for an arbitrary address, including a Unix socket address for privileged daemons like D-Bus.
This vulnerability is not exploitable on vz driver, as the guest agent uses vsocks instead of Unix sockets.
Patches
Patched in Lima v2.1.3 (8a45892378d22f40505c31a38f786a07701b6d50)
[!NOTE] The default user account in the VM can still run an arbitrary command as the root via the guest agent socket. This is not a vulnerability, as the user can already run an arbitrary command with
sudoby design.
Workarounds
- On macOS hosts, use
vzdriver instead ofqemu(limactl create --vm-type=vz. Default since v1.0.) - Or, disable the guest agent (
limactl create --plain)
The vulnerability requires local access to the device to be exploited. It is easy for an attacker to exploit this vulnerability. An attacker needs high-level or administrative privileges. No user interaction is needed for the attacker to exploit this vulnerability. The vulnerability can affect other systems as well, not just the initial system. There is a high impact on the confidentiality of the information. There is a high impact on the integrity of the data. There is a high impact on the availability of the system.
Exploitation activity has been observed. Apply available patches or mitigations urgently.
The exploit probability is very low. The vulnerability is unlikely to be exploited in the next 30 days.
We did not find any exploit available. Neither in GitHub repositories nor in the Exploit-Database.
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