In Kong Mesh running in universal mode with a MeshIdentity whose SPIFFE ID path template derives from the dataplane's kuma.io/workload label, the XDS authenticator in kuma-cp validates that label only when the dataplane token is bound to a workload. Workload binding is optional, so a dataplane presenting a tags-bound token can register with kuma.io/workload set to any value and obtain another workload's SPIFFE identity.
Attack Parameters
Attack Vector
Network
Can be exploited remotely
Attack Complexity
Low
Easy to exploit
Attack Requirements
Present
Additional conditions required
Privileges Required
Low
Basic privileges needed
User Interaction
None
No user interaction needed
Impact Assessment
Confidentiality
High
Complete data leak
Integrity
Low
Partial data modification
Availability
None
No disruption
CVSS Vector v4.0
Weakness Type (CWE)
Vulnerable Products
kong inc.:kong mesh
References 5
https://github.com/kumahq/kuma/security/advisories/GHSA-744g-c785-x65q
Upstream advisory GHSA-744g-c785-x65q
https://github.com/kumahq/kuma/pull/17474
kumahq/kuma#17474 (master)
https://github.com/kumahq/kuma/pull/17503
kumahq/kuma#17503 (release-2.13 backport)
https://github.com/kumahq/kuma/pull/17502
kumahq/kuma#17502 (release-2.14 backport)
https://developer.konghq.com/mesh/changelog/
Kong MESH Changelog