Omni manages Kubernetes on bare metal, virtual machines, or in a cloud. Prior to 1.6.6 and 1.7.3, managementServer.CreateSchematic in internal/backend/grpc/schematics.go passes the caller-controlled TalosVersion field to imageFactoryClient.OverlaysVersions without validating it as a version. An authenticated Operator can submit traversal segments in TalosVersion, and url.URL.JoinPath normalizes them into unintended paths on the configured image-factory host.
Omni then issues HTTP GET requests to those paths and reflects error-body content, enabling same-host endpoint probing and possible disclosure of internal diagnostics while preventing redirection to another host or write requests. This issue is fixed in versions 1.6.6 and 1.7.3.
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
Low
Partial data leak
Integrity
None
No data modification
Availability
None
No disruption
CVSS Vector v3.1
Weakness Type (CWE)
References 7
https://github.com/siderolabs/omni/commit/13c3f289789842e1fd954d98babb34b94eea1…
security-advisories@github.com
https://github.com/siderolabs/omni/commit/3e69e80802624bf322f16aa499d5eafca16d0…
security-advisories@github.com
https://github.com/siderolabs/omni/commit/9426c2cabccaa1d442bc8ebf28c16cae2d7c6…
security-advisories@github.com
https://github.com/siderolabs/omni/pull/2817
security-advisories@github.com
https://github.com/siderolabs/omni/releases/tag/v1.6.6
security-advisories@github.com
https://github.com/siderolabs/omni/releases/tag/v1.7.3
security-advisories@github.com
https://github.com/siderolabs/omni/security/advisories/GHSA-c66c-vq6w-fvh5
security-advisories@github.com