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Format: 1.8
Date: Fri, 28 Aug 2026 09:41:35 +0200
Source: keystone
Architecture: source
Version: 2:27.0.0-3+deb13u5
Distribution: trixie-security
Urgency: medium
Maintainer: Debian OpenStack <team+openstack@tracker.debian.org>
Changed-By: Thomas Goirand <zigo@debian.org>
Closes: 1145669 1145816
Changes:
 keystone (2:27.0.0-3+deb13u5) trixie-security; urgency=medium
 .
   * CVE-2026-80184: Delegation bypass in trust, OAuth1, and application
     credential operations.
   * CVE-2026-80182: Tokens obtained via application credential or EC2
     credential authentication can escape their intended project scope through
     token-method reauthentication. An application-credential token scoped to
     one project can be exchanged via POST /v3/auth/tokens with no explicit
     scope, causing Keystone to issue a new token scoped to the owner's default
     project. For EC2-derived tokens the bypass is broader: because they carry
     no delegation markers, they can rescope to any project where the underlying
     user has role assignments.
   * Add new patches (Closes: #1145669):
     - CVE-2026-80182_CVE-2026-80184_1_Block_app_credential_token_resco....patch
     - CVE-2026-80182_CVE-2026-80184_2_auth_encode_ec2credential_and_oa....patch
     - CVE-2026-80182_CVE-2026-80184_3_trusts_oauth1_app-creds_reject_d....patch
     - CVE-2026-80182_CVE-2026-80184_4_auth_reject_delegated_tokens_fro....patch
   * CVE-2026-80183 / OSSN-2026-0XXX: any authenticated user holding role:reader
     on any project can list every project-scoped role assignment under any
     domain by passing a domain ID as scope.project.id with include_subtree to
     the GET /v3/role_assignments endpoint. The domain's project record has
     domain_id=null, causing the policy domain_id check to pass for any caller.
     With include_names, the response discloses the names and home-domain IDs of
     every user, group, project, and role involved. The literal "default" domain
     ID works against any deployment created with keystone-manage bootstrap. An
     attacker can harvest domain IDs from the response and repeat the query to
     map role assignments across the entire cloud. This is caused by misuse of
     "None" in list_role_assignments_for_tree.
     Applied upstream patch (Closes: #1145816):
     - CVE-2026-80183_Prevent_unauthorized_project-scoped_assignment_list.patch
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