The default kuma-cp configuration in Kong Mesh reveals the admin bootstrap token and signing keys to any webpage the operator visits while the control plane is reachable from their browser. Due to a CORS misconfiguration a cross-origin fetch() from a malicious page returns the admin JWT and signing material.
Attack Parameters
Attack Vector
Network
Can be exploited remotely
Attack Complexity
Low
Easy to exploit
Attack Requirements
None
No additional conditions
Privileges Required
None
No privileges needed
User Interaction
Active
User action required
Impact Assessment
Confidentiality
Low
Partial 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 8
https://github.com/kumahq/kuma/security/advisories/GHSA-3vcp-chfh-f6r2
Upstream advisory GHSA-3vcp-chfh-f6r2
https://github.com/kumahq/kuma/pull/16416
kumahq/kuma#16416 (master)
https://github.com/kumahq/kuma/pull/16423
kumahq/kuma#16423 (backport)
https://github.com/kumahq/kuma/pull/16424
kumahq/kuma#16424 (backport)
https://github.com/kumahq/kuma/pull/16425
kumahq/kuma#16425 (backport)
https://github.com/kumahq/kuma/pull/16426
kumahq/kuma#16426 (backport)
https://github.com/kumahq/kuma/pull/16427
kumahq/kuma#16427 (backport)
https://developer.konghq.com/mesh/changelog/
Kong MESH Changelog