CVE-2014-3953

FreeBSD 8.4 anterior a p14, 9.1 anterior a p17, 9.2 anterior a p10 y 10.0 anterior a p7 no inicializa debidamente ciertas estructuras de datos, lo que permite a usuarios locales obtener información sensible de la memoria del kernel a través de un cmsg (1) SCTP_SNDRCV, (2) SCTP_EXTRCV o (3) SCTP_RCVINFO SCTP o una notificación (4) SCTP_PEER_ADDR_CHANGE, (5) SCTP_REMOTE_ERROR o (6) SCTP_AUTHENTICATION_EVENT.

The control message API is used to construct ancillary data objects for use in control messages sent and received across sockets and passed via the recvmsg(2) and sendmsg(2) system calls. Buffer between control message header and data may not be completely initialized before being copied to userland. Three SCTP cmsgs, SCTP_SNDRCV, SCTP_EXTRCV and SCTP_RCVINFO, have implicit padding that may not be completely initialized before being copied to userland. In addition, three SCTP notifications, SCTP_PEER_ADDR_CHANGE, SCTP_REMOTE_ERROR and SCTP_AUTHENTICATION_EVENT, have padding in the returning data structure that may not be completely initialized before being copied to userland.