diff options
Diffstat (limited to 'package/samba/samba-CVE-2011-0719.patch')
| -rw-r--r-- | package/samba/samba-CVE-2011-0719.patch | 613 |
1 files changed, 0 insertions, 613 deletions
diff --git a/package/samba/samba-CVE-2011-0719.patch b/package/samba/samba-CVE-2011-0719.patch deleted file mode 100644 index 1cb8580aa..000000000 --- a/package/samba/samba-CVE-2011-0719.patch +++ /dev/null @@ -1,613 +0,0 @@ -From 724e44eed299c618066dec411530aa9f156119ec Mon Sep 17 00:00:00 2001 -From: Karolin Seeger <kseeger@samba.org> -Date: Sun, 27 Feb 2011 18:28:29 +0100 -Subject: [PATCH] Fix denial of service - memory corruption. - -CVE-2011-0719 - -Fix bug #7949 (DoS in Winbind and smbd with many file descriptors open). - -All current released versions of Samba are vulnerable to -a denial of service caused by memory corruption. Range -checks on file descriptors being used in the FD_SET macro -were not present allowing stack corruption. This can cause -the Samba code to crash or to loop attempting to select -on a bad file descriptor set. - -A connection to a file share, or a local account is needed -to exploit this problem, either authenticated or unauthenticated -(guest connection). - -Currently we do not believe this flaw is exploitable -beyond a crash or causing the code to loop, but on the -advice of our security reviewers we are releasing fixes -in case an exploit is discovered at a later date. ---- - source/client/client.c | 4 +++- - source/client/dnsbrowse.c | 12 ++++++++++++ - source/lib/events.c | 13 +++++++++++++ - source/lib/packet.c | 5 +++++ - source/lib/readline.c | 5 +++++ - source/lib/select.c | 6 ++++++ - source/lib/util_sock.c | 11 +++++++++-- - source/libaddns/dnssock.c | 6 +++++- - source/libsmb/nmblib.c | 5 +++++ - source/nmbd/nmbd_packets.c | 24 ++++++++++++++++++++++-- - source/nsswitch/wb_common.c | 22 ++++++++++++++++++++-- - source/printing/printing.c | 5 +++++ - source/smbd/dnsregister.c | 6 ++++++ - source/smbd/oplock.c | 5 ++++- - source/smbd/oplock_irix.c | 5 +++++ - source/smbd/process.c | 2 +- - source/smbd/server.c | 29 +++++++++++++++++++++-------- - source/utils/smbfilter.c | 8 ++++++-- - source/winbindd/winbindd.c | 12 +++++++++++- - source/winbindd/winbindd_dual.c | 7 +++++++ - 20 files changed, 171 insertions(+), 21 deletions(-) - -diff --git a/source/client/client.c b/source/client/client.c -index 53bd9e6..a989441 100644 ---- a/source/client/client.c -+++ b/source/client/client.c -@@ -4379,8 +4379,10 @@ static void readline_callback(void) - - again: - -- if (cli->fd == -1) -+ if (cli->fd < 0 || cli->fd >= FD_SETSIZE) { -+ errno = EBADF; - return; -+ } - - FD_ZERO(&fds); - FD_SET(cli->fd,&fds); -diff --git a/source/client/dnsbrowse.c b/source/client/dnsbrowse.c -index 5e3a4de..aa2fb22 100644 ---- a/source/client/dnsbrowse.c -+++ b/source/client/dnsbrowse.c -@@ -81,6 +81,11 @@ static void do_smb_resolve(struct mdns_smbsrv_result *browsesrv) - TALLOC_FREE(fdset); - } - -+ if (mdnsfd < 0 || mdnsfd >= FD_SETSIZE) { -+ errno = EBADF; -+ break; -+ } -+ - fdsetsz = howmany(mdnsfd + 1, NFDBITS) * sizeof(fd_mask); - fdset = TALLOC_ZERO(ctx, fdsetsz); - FD_SET(mdnsfd, fdset); -@@ -183,6 +188,13 @@ int do_smb_browse(void) - - fdsetsz = howmany(mdnsfd + 1, NFDBITS) * sizeof(fd_mask); - fdset = TALLOC_ZERO(ctx, fdsetsz); -+ -+ if (mdnsfd < 0 || mdnsfd >= FD_SETSIZE) { -+ errno = EBADF; -+ TALLOC_FREE(ctx); -+ return 1; -+ } -+ - FD_SET(mdnsfd, fdset); - - tv.tv_sec = 1; -diff --git a/source/lib/events.c b/source/lib/events.c -index cd20ceb..2ddbab7 100644 ---- a/source/lib/events.c -+++ b/source/lib/events.c -@@ -140,6 +140,11 @@ struct fd_event *event_add_fd(struct event_context *event_ctx, - { - struct fd_event *fde; - -+ if (fd < 0 || fd >= FD_SETSIZE) { -+ errno = EBADF; -+ return NULL; -+ } -+ - if (!(fde = TALLOC_P(mem_ctx, struct fd_event))) { - return NULL; - } -@@ -190,6 +195,14 @@ bool event_add_to_select_args(struct event_context *event_ctx, - bool ret = False; - - for (fde = event_ctx->fd_events; fde; fde = fde->next) { -+ if (fde->fd < 0 || fde->fd >= FD_SETSIZE) { -+ /* We ignore here, as it shouldn't be -+ possible to add an invalid fde->fd -+ but we don't want FD_SET to see an -+ invalid fd. */ -+ continue; -+ } -+ - if (fde->flags & EVENT_FD_READ) { - FD_SET(fde->fd, read_fds); - ret = True; -diff --git a/source/lib/packet.c b/source/lib/packet.c -index e048616..512c7f2 100644 ---- a/source/lib/packet.c -+++ b/source/lib/packet.c -@@ -106,6 +106,11 @@ NTSTATUS packet_fd_read_sync(struct packet_context *ctx) - int res; - fd_set r_fds; - -+ if (ctx->fd < 0 || ctx->fd >= FD_SETSIZE) { -+ errno = EBADF; -+ return map_nt_error_from_unix(errno); -+ } -+ - FD_ZERO(&r_fds); - FD_SET(ctx->fd, &r_fds); - -diff --git a/source/lib/readline.c b/source/lib/readline.c -index 34867aa..70a82f2 100644 ---- a/source/lib/readline.c -+++ b/source/lib/readline.c -@@ -91,6 +91,11 @@ static char *smb_readline_replacement(const char *prompt, void (*callback)(void) - timeout.tv_sec = 5; - timeout.tv_usec = 0; - -+ if (fd < 0 || fd >= FD_SETSIZE) { -+ errno = EBADF; -+ break; -+ } -+ - FD_ZERO(&fds); - FD_SET(fd,&fds); - -diff --git a/source/lib/select.c b/source/lib/select.c -index c3da6a9..2d5f02c 100644 ---- a/source/lib/select.c -+++ b/source/lib/select.c -@@ -61,6 +61,11 @@ int sys_select(int maxfd, fd_set *readfds, fd_set *writefds, fd_set *errorfds, s - if (pipe(select_pipe) == -1) - smb_panic("Could not create select pipe"); - -+ if (select_pipe[0] < 0 || select_pipe[0] >= FD_SETSIZE) { -+ errno = EBADF; -+ return -1; -+ } -+ - /* - * These next two lines seem to fix a bug with the Linux - * 2.0.x kernel (and probably other UNIXes as well) where -@@ -87,6 +92,7 @@ int sys_select(int maxfd, fd_set *readfds, fd_set *writefds, fd_set *errorfds, s - readfds2 = &readfds_buf; - FD_ZERO(readfds2); - } -+ - FD_SET(select_pipe[0], readfds2); - - errno = 0; -diff --git a/source/lib/util_sock.c b/source/lib/util_sock.c -index 650bd13..8aa2c97 100644 ---- a/source/lib/util_sock.c -+++ b/source/lib/util_sock.c -@@ -960,6 +960,11 @@ NTSTATUS read_socket_with_timeout(int fd, char *buf, - timeout.tv_usec = (long)(1000 * (time_out % 1000)); - - for (nread=0; nread < mincnt; ) { -+ if (fd < 0 || fd >= FD_SETSIZE) { -+ errno = EBADF; -+ return map_nt_error_from_unix(EBADF); -+ } -+ - FD_ZERO(&fds); - FD_SET(fd,&fds); - -@@ -1492,7 +1497,7 @@ bool open_any_socket_out(struct sockaddr_storage *addrs, int num_addrs, - - for (i=0; i<num_addrs; i++) { - sockets[i] = socket(addrs[i].ss_family, SOCK_STREAM, 0); -- if (sockets[i] < 0) -+ if (sockets[i] < 0 || sockets[i] >= FD_SETSIZE) - goto done; - set_blocking(sockets[i], false); - } -@@ -1541,8 +1546,10 @@ bool open_any_socket_out(struct sockaddr_storage *addrs, int num_addrs, - FD_ZERO(&r_fds); - - for (i=0; i<num_addrs; i++) { -- if (sockets[i] == -1) -+ if (sockets[i] < 0 || sockets[i] >= FD_SETSIZE) { -+ /* This cannot happen - ignore if so. */ - continue; -+ } - FD_SET(sockets[i], &wr_fds); - FD_SET(sockets[i], &r_fds); - if (sockets[i]>maxfd) -diff --git a/source/libaddns/dnssock.c b/source/libaddns/dnssock.c -index 7c8bd41..f427bd5 100644 ---- a/source/libaddns/dnssock.c -+++ b/source/libaddns/dnssock.c -@@ -218,7 +218,11 @@ static DNS_ERROR read_all(int fd, uint8 *data, size_t len) - while (total < len) { - ssize_t ret; - int fd_ready; -- -+ -+ if (fd < 0 || fd >= FD_SETSIZE) { -+ return ERROR_DNS_SOCKET_ERROR; -+ } -+ - FD_ZERO( &rfds ); - FD_SET( fd, &rfds ); - -diff --git a/source/libsmb/nmblib.c b/source/libsmb/nmblib.c -index bfe5e7b..768e54d 100644 ---- a/source/libsmb/nmblib.c -+++ b/source/libsmb/nmblib.c -@@ -1097,6 +1097,11 @@ struct packet_struct *receive_packet(int fd,enum packet_type type,int t) - struct timeval timeout; - int ret; - -+ if (fd < 0 || fd >= FD_SETSIZE) { -+ errno = EBADF; -+ return NULL; -+ } -+ - FD_ZERO(&fds); - FD_SET(fd,&fds); - timeout.tv_sec = t/1000; -diff --git a/source/nmbd/nmbd_packets.c b/source/nmbd/nmbd_packets.c -index 4b97819..03e5362 100644 ---- a/source/nmbd/nmbd_packets.c -+++ b/source/nmbd/nmbd_packets.c -@@ -1683,7 +1683,7 @@ static bool create_listen_fdset(fd_set **ppset, int **psock_array, int *listen_n - for (subrec = FIRST_SUBNET; subrec; subrec = NEXT_SUBNET_EXCLUDING_UNICAST(subrec)) - count++; - -- if((count*2) + 2 > FD_SETSIZE) { -+ if((count*2) + 2 >= FD_SETSIZE) { - DEBUG(0,("create_listen_fdset: Too many file descriptors needed (%d). We can \ - only use %d.\n", (count*2) + 2, FD_SETSIZE)); - SAFE_FREE(pset); -@@ -1699,24 +1699,44 @@ only use %d.\n", (count*2) + 2, FD_SETSIZE)); - FD_ZERO(pset); - - /* Add in the broadcast socket on 137. */ -+ if (ClientNMB < 0 || ClientNMB >= FD_SETSIZE) { -+ errno = EBADF; -+ SAFE_FREE(pset); -+ return True; -+ } -+ - FD_SET(ClientNMB,pset); - sock_array[num++] = ClientNMB; - *maxfd = MAX( *maxfd, ClientNMB); - - /* Add in the 137 sockets on all the interfaces. */ - for (subrec = FIRST_SUBNET; subrec; subrec = NEXT_SUBNET_EXCLUDING_UNICAST(subrec)) { -+ if (subrec->nmb_sock < 0 || subrec->nmb_sock >= FD_SETSIZE) { -+ /* We have to ignore sockets outside FD_SETSIZE. */ -+ continue; -+ } - FD_SET(subrec->nmb_sock,pset); - sock_array[num++] = subrec->nmb_sock; - *maxfd = MAX( *maxfd, subrec->nmb_sock); - } - - /* Add in the broadcast socket on 138. */ -+ if (ClientDGRAM < 0 || ClientDGRAM >= FD_SETSIZE) { -+ errno = EBADF; -+ SAFE_FREE(pset); -+ return True; -+ } -+ - FD_SET(ClientDGRAM,pset); - sock_array[num++] = ClientDGRAM; - *maxfd = MAX( *maxfd, ClientDGRAM); - - /* Add in the 138 sockets on all the interfaces. */ - for (subrec = FIRST_SUBNET; subrec; subrec = NEXT_SUBNET_EXCLUDING_UNICAST(subrec)) { -+ if (subrec->dgram_sock < 0 || subrec->dgram_sock >= FD_SETSIZE) { -+ /* We have to ignore sockets outside FD_SETSIZE. */ -+ continue; -+ } - FD_SET(subrec->dgram_sock,pset); - sock_array[num++] = subrec->dgram_sock; - *maxfd = MAX( *maxfd, subrec->dgram_sock); -@@ -1767,7 +1787,7 @@ bool listen_for_packets(bool run_election) - - #ifndef SYNC_DNS - dns_fd = asyncdns_fd(); -- if (dns_fd != -1) { -+ if (dns_fd >= 0 && dns_fd < FD_SETSIZE) { - FD_SET(dns_fd, &r_fds); - maxfd = MAX( maxfd, dns_fd); - } -diff --git a/source/nsswitch/wb_common.c b/source/nsswitch/wb_common.c -index a164621..4f76bd0 100644 ---- a/source/nsswitch/wb_common.c -+++ b/source/nsswitch/wb_common.c -@@ -240,6 +240,12 @@ static int winbind_named_pipe_sock(const char *dir) - - switch (errno) { - case EINPROGRESS: -+ -+ if (fd < 0 || fd >= FD_SETSIZE) { -+ errno = EBADF; -+ goto error_out; -+ } -+ - FD_ZERO(&w_fds); - FD_SET(fd, &w_fds); - tv.tv_sec = CONNECT_TIMEOUT - wait_time; -@@ -383,7 +389,13 @@ int winbind_write_sock(void *buffer, int count, int recursing, int need_priv) - while(nwritten < count) { - struct timeval tv; - fd_set r_fds; -- -+ -+ if (winbindd_fd < 0 || winbindd_fd >= FD_SETSIZE) { -+ errno = EBADF; -+ winbind_close_sock(); -+ return -1; -+ } -+ - /* Catch pipe close on other end by checking if a read() - call would not block by calling select(). */ - -@@ -443,7 +455,13 @@ int winbind_read_sock(void *buffer, int count) - while(nread < count) { - struct timeval tv; - fd_set r_fds; -- -+ -+ if (winbindd_fd < 0 || winbindd_fd >= FD_SETSIZE) { -+ errno = EBADF; -+ winbind_close_sock(); -+ return -1; -+ } -+ - /* Catch pipe close on other end by checking if a read() - call would not block by calling select(). */ - -diff --git a/source/printing/printing.c b/source/printing/printing.c -index a9272eb..c3b8c61 100644 ---- a/source/printing/printing.c -+++ b/source/printing/printing.c -@@ -1407,6 +1407,11 @@ void start_background_queue(void) - exit(1); - } - -+ if (pause_pipe[1] < 0 || pause_pipe[1] >= FD_SETSIZE) { -+ DEBUG(5,("start_background_queue: pipe fd out of range.\n")); -+ exit(1); -+ } -+ - background_lpq_updater_pid = sys_fork(); - - if (background_lpq_updater_pid == -1) { -diff --git a/source/smbd/dnsregister.c b/source/smbd/dnsregister.c -index f02739e..3c689b9 100644 ---- a/source/smbd/dnsregister.c -+++ b/source/smbd/dnsregister.c -@@ -125,6 +125,9 @@ void dns_register_smbd(struct dns_reg_state ** dns_state_ptr, - */ - if (dns_state->srv_ref != NULL) { - mdnsd_conn_fd = DNSServiceRefSockFD(dns_state->srv_ref); -+ if (mdnsd_conn_fd < 0 || mdnsd_conn_fd >= FD_SETSIZE) { -+ return; -+ } - FD_SET(mdnsd_conn_fd, listen_set); - return; - } -@@ -156,6 +159,9 @@ void dns_register_smbd(struct dns_reg_state ** dns_state_ptr, - } - - mdnsd_conn_fd = DNSServiceRefSockFD(dns_state->srv_ref); -+ if (mdnsd_conn_fd < 0 || mdnsd_conn_fd >= FD_SETSIZE) { -+ return; -+ } - FD_SET(mdnsd_conn_fd, listen_set); - *maxfd = MAX(*maxfd, mdnsd_conn_fd); - *timeout = timeval_zero(); -diff --git a/source/smbd/oplock.c b/source/smbd/oplock.c -index a07d05d..5ae3fdf 100644 ---- a/source/smbd/oplock.c -+++ b/source/smbd/oplock.c -@@ -241,7 +241,10 @@ bool downgrade_oplock(files_struct *fsp) - int oplock_notify_fd(void) - { - if (koplocks) { -- return koplocks->notification_fd; -+ int fd = koplocks->notification_fd; -+ if (fd < 0 || fd >= FD_SETSIZE) { -+ return -1; -+ } - } - - return -1; -diff --git a/source/smbd/oplock_irix.c b/source/smbd/oplock_irix.c -index 8c287c9..6e86fac 100644 ---- a/source/smbd/oplock_irix.c -+++ b/source/smbd/oplock_irix.c -@@ -284,6 +284,11 @@ struct kernel_oplocks *irix_init_kernel_oplocks(void) - return False; - } - -+ if (pfd[0] < 0 || pfd[0] >= FD_SETSIZE) { -+ DEBUG(0,("setup_kernel_oplock_pipe: fd out of range.\n")); -+ return False; -+ } -+ - oplock_pipe_read = pfd[0]; - oplock_pipe_write = pfd[1]; - -diff --git a/source/smbd/process.c b/source/smbd/process.c -index 403c7c6..9b8f29b 100644 ---- a/source/smbd/process.c -+++ b/source/smbd/process.c -@@ -698,7 +698,7 @@ static void async_processing(fd_set *pfds) - - static int select_on_fd(int fd, int maxfd, fd_set *fds) - { -- if (fd != -1) { -+ if (fd != -1 && fd < FD_SETSIZE) { - FD_SET(fd, fds); - maxfd = MAX(maxfd, fd); - } -diff --git a/source/smbd/server.c b/source/smbd/server.c -index 5129484..a670334 100644 ---- a/source/smbd/server.c -+++ b/source/smbd/server.c -@@ -209,7 +209,13 @@ static bool open_sockets_inetd(void) - /* Started from inetd. fd 0 is the socket. */ - /* We will abort gracefully when the client or remote system - goes away */ -- smbd_set_server_fd(dup(0)); -+ int fd = dup(0); -+ -+ if (fd < 0 || fd >= FD_SETSIZE) { -+ return false; -+ } -+ -+ smbd_set_server_fd(fd); - - /* close our standard file descriptors */ - close_low_fds(False); /* Don't close stderr */ -@@ -436,7 +442,8 @@ static bool open_sockets_smbd(bool is_daemon, bool interactive, const char *smb_ - num_sockets == 0 ? 0 : 2, - ifss, - true); -- if(s == -1) { -+ if(s < 0 || s >= FD_SETSIZE) { -+ close(s); - continue; - } - -@@ -516,7 +523,7 @@ static bool open_sockets_smbd(bool is_daemon, bool interactive, const char *smb_ - num_sockets == 0 ? 0 : 2, - &ss, - true); -- if (s == -1) { -+ if (s < 0 || s >= FD_SETSIZE) { - continue; - } - -@@ -709,6 +716,7 @@ static bool open_sockets_smbd(bool is_daemon, bool interactive, const char *smb_ - struct sockaddr addr; - socklen_t in_addrlen = sizeof(addr); - pid_t child = 0; -+ int fd; - - s = -1; - for(i = 0; i < num_sockets; i++) { -@@ -721,16 +729,21 @@ static bool open_sockets_smbd(bool is_daemon, bool interactive, const char *smb_ - } - } - -- smbd_set_server_fd(accept(s,&addr,&in_addrlen)); -- -- if (smbd_server_fd() == -1 && errno == EINTR) -+ fd = accept(s,&addr,&in_addrlen); -+ if (fd == -1 && errno == EINTR) - continue; -- -- if (smbd_server_fd() == -1) { -+ if (fd == -1) { - DEBUG(2,("open_sockets_smbd: accept: %s\n", - strerror(errno))); - continue; - } -+ if (fd < 0 || fd >= FD_SETSIZE) { -+ DEBUG(2,("open_sockets_smbd: bad fd %d\n", -+ fd )); -+ continue; -+ } -+ -+ smbd_set_server_fd(fd); - - /* Ensure child is set to blocking mode */ - set_blocking(smbd_server_fd(),True); -diff --git a/source/utils/smbfilter.c b/source/utils/smbfilter.c -index 1e22a40..45f9207 100644 ---- a/source/utils/smbfilter.c -+++ b/source/utils/smbfilter.c -@@ -162,8 +162,8 @@ static void filter_child(int c, struct sockaddr_storage *dest_ss) - int num; - - FD_ZERO(&fds); -- if (s != -1) FD_SET(s, &fds); -- if (c != -1) FD_SET(c, &fds); -+ if (s >= 0 && s < FD_SETSIZE) FD_SET(s, &fds); -+ if (c >= 0 && c < FD_SETSIZE) FD_SET(c, &fds); - - num = sys_select_intr(MAX(s+1, c+1),&fds,NULL,NULL,NULL); - if (num <= 0) continue; -@@ -235,6 +235,10 @@ static void start_filter(char *desthost) - struct sockaddr_storage ss; - socklen_t in_addrlen = sizeof(ss); - -+ if (s < 0 || s >= FD_SETSIZE) { -+ break; -+ } -+ - FD_ZERO(&fds); - FD_SET(s, &fds); - -diff --git a/source/winbindd/winbindd.c b/source/winbindd/winbindd.c -index 1d618e2..6b5c251 100644 ---- a/source/winbindd/winbindd.c -+++ b/source/winbindd/winbindd.c -@@ -836,7 +836,8 @@ static void process_loop(void) - listen_sock = open_winbindd_socket(); - listen_priv_sock = open_winbindd_priv_socket(); - -- if (listen_sock == -1 || listen_priv_sock == -1) { -+ if (listen_sock < 0 || listen_sock >= FD_SETSIZE || -+ listen_priv_sock < 0 || listen_priv_sock >= FD_SETSIZE) { - perror("open_winbind_socket"); - exit(1); - } -@@ -861,6 +862,9 @@ static void process_loop(void) - - FD_ZERO(&r_fds); - FD_ZERO(&w_fds); -+ -+ /* We check the range for listen_sock and -+ listen_priv_sock above. */ - FD_SET(listen_sock, &r_fds); - FD_SET(listen_priv_sock, &r_fds); - -@@ -890,6 +894,12 @@ static void process_loop(void) - } - - for (ev = fd_events; ev; ev = ev->next) { -+ if (ev->fd < 0 || ev->fd >= FD_SETSIZE) { -+ /* Ignore here - event_add_to_select_args -+ should make this impossible. */ -+ continue; -+ } -+ - if (ev->flags & EVENT_FD_READ) { - FD_SET(ev->fd, &r_fds); - maxfd = MAX(ev->fd, maxfd); -diff --git a/source/winbindd/winbindd_dual.c b/source/winbindd/winbindd_dual.c -index ff004f2..b30ec20 100644 ---- a/source/winbindd/winbindd_dual.c -+++ b/source/winbindd/winbindd_dual.c -@@ -1250,6 +1250,12 @@ static bool fork_domain_child(struct winbindd_child *child) - return False; - } - -+ if (fdpair[0] < 0 || fdpair[0] >= FD_SETSIZE) { -+ DEBUG(0, ("fork_domain_child: bad fd range (%d)\n", fdpair[0])); -+ errno = EBADF; -+ return False; -+ } -+ - ZERO_STRUCT(state); - state.pid = sys_getpid(); - -@@ -1405,6 +1411,7 @@ static bool fork_domain_child(struct winbindd_child *child) - message_dispatch(winbind_messaging_context()); - - FD_ZERO(&read_fds); -+ /* We check state.sock against FD_SETSIZE above. */ - FD_SET(state.sock, &read_fds); - - ret = sys_select(state.sock + 1, &read_fds, NULL, NULL, tp); --- -1.6.4.2 - |