Samba 3.6.6 through 3.6.23, 4.0.x before 4.0.18, and 4.1.x before 4.1.8, when a certain vfs shadow copy configuration is enabled, does not properly initialize the SRVSNAPSHOTARRAY response field, which allows remote authenticated users to obtain potentially sensitive information from process memory via a (1) FSCTLGETSHADOWCOPYDATA or (2) FSCTLSRVENUMERATE_SNAPSHOTS request.