The guest-to-host Unix-domain socket relay in Docker Sandboxes validates that a socket path is inside an authorized workspace, but later reconnects using the pathname. A malicious guest can replace an intermediate directory with a symlink between validation and connection, causing the host to connect to an arbitrary AF_UNIX socket outside the shared workspace. This can expose data or host-side capabilities provided by the targeted socket.
Attack Parameters
Attack Vector
Local
Requires local access
Attack Complexity
Low
Easy to exploit
Attack Requirements
Present
Additional conditions required
Privileges Required
None
No privileges needed
User Interaction
None
No user interaction needed
Impact Assessment
Confidentiality
High
Complete data leak
Integrity
High
Complete data modification
Availability
None
No disruption
CVSS Vector v4.0
Weakness Type (CWE)
Vulnerable Products
docker:docker sandboxes
References 6
https://docs.docker.com/ai/sandboxes/
security@docker.com
https://docs.docker.com/ai/sandboxes/security/isolation/
security@docker.com
https://github.com/docker/sailor/pull/2021
security@docker.com
https://github.com/docker/sandboxes/pull/5342
security@docker.com
https://github.com/docker/sbx-releases/releases/tag/v0.41.0
security@docker.com
https://github.com/docker/sbx-releases/releases/tag/v0.42.0
security@docker.com