{"id":"GHSA-6758-979h-249x","summary":"capsule-proxy service discloses Namespaces of colliding tenants to owners of different tenants with the same ServiceAccount name","details":"### Summary\n\nA bug in the RoleBinding reflector used by `capsule-proxy` gives ServiceAccount tenant owners the right to list Namespaces of other tenants backed by the same owner kind and name.\n\n### Details\n\n- Tenant `solar`, owned by a ServiceAccount named `tenant-owner` in the Namespace `solar`\n- Tenant `wind`, owned by a ServiceAccount named `tenant-owner` in the Namespace `wind`\n\n\u003e Please, notice the same ServiceAccount name, although in different namespaces.\n\nThe Tenant owner `solar` would be able to list the namespaces of the Tenant `wind` and vice-versa, although this is not correct.\n\nThe bug introduces an exfiltration vulnerability since allows the listing of Namespace resources of other Tenants, although just in some specific conditions:\n\n1. `capsule-proxy` runs with the `--disable-caching=false` (default value: `false`)\n2. Tenant owners are ServiceAccount, with the same resource name, but in different Namespaces.\n\nThe CVE doesn't allow any privilege escalation on the outer tenant Namespace-scoped resources, since the Kubernetes RBAC is enforcing this.","aliases":["CVE-2023-46254"],"modified":"2023-11-08T04:13:41.985370Z","published":"2023-11-07T21:46:04Z","related":["CVE-2023-46254"],"database_specific":{"github_reviewed_at":"2023-11-07T21:46:04Z","cwe_ids":["CWE-200"],"severity":"MODERATE","nvd_published_at":"2023-11-06T19:15:09Z","github_reviewed":true},"references":[{"type":"WEB","url":"https://github.com/projectcapsule/capsule-proxy/security/advisories/GHSA-6758-979h-249x"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2023-46254"},{"type":"WEB","url":"https://github.com/projectcapsule/capsule-proxy/commit/615202f7b02eaec7681336bd63daed1f39ae00c5"},{"type":"PACKAGE","url":"https://github.com/projectcapsule/capsule-proxy"},{"type":"WEB","url":"https://github.com/projectcapsule/capsule-proxy/releases/tag/v0.4.5"}],"affected":[{"package":{"name":"github.com/projectcapsule/capsule","ecosystem":"Go","purl":"pkg:golang/github.com/projectcapsule/capsule"},"ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"0.4.5"}]}],"database_specific":{"last_known_affected_version_range":"\u003c= 0.4.4","source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2023/11/GHSA-6758-979h-249x/GHSA-6758-979h-249x.json"}},{"package":{"name":"github.com/projectcapsule/capsule-proxy","ecosystem":"Go","purl":"pkg:golang/github.com/projectcapsule/capsule-proxy"},"ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"0.4.5"}]}],"database_specific":{"last_known_affected_version_range":"\u003c= 0.4.4","source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2023/11/GHSA-6758-979h-249x/GHSA-6758-979h-249x.json"}}],"schema_version":"1.7.3","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N"}]}