Files
minio/cmd
Feng Ruohang a0de92fcbe fix(iam): refresh LDAP groups on the stored credential, not a stale snapshot
The hourly LDAP group refresh, which every server runs, reads the STS and
service-account credentials from its own cache, queries the directory,
and wrote each credential whose groups changed back whole through
UpdateUserIdentity. A secret rotation or an edit made meanwhile, on this
server or one whose notification it missed, was undone, and a credential
deleted meanwhile came back enabled with its old secret.

RefreshUserGroups replaces that writer, whose only caller was the
refresh. Under the identity's cross-node revision lock it loads the
stored record, refuses one that is absent, deleted, expired or now has
another parent (whose groups the lookup did not compute), and otherwise
changes only the groups of the stored record. A record without its
access key gets it from the path, as the loaders do. A refused refresh
drops the stale entry from the cache, which loads what is stored on next
use; a written or unchanged one caches the stored record. An STS record
keeps the lease of its token's remaining lifetime.

Tests cover rotation and edit, deletion, a sibling server whose cache did
not hear of a rotation or a deletion, recreation under the same and under
another parent, unchanged groups, and a stored record without its access
key. Written back as the old snapshot write, every case fails.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Signed-off-by: Feng Ruohang <rh@vonng.com>
2026-11-08 12:00:20 +08:00
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