Merge branch 'maint-0.3.0' into release-0.3.0
This commit is contained in:
commit
916791f0be
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@ -0,0 +1,8 @@
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o Major bugfixes (hidden service, relay, security):
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- Fix an assertion failure when an hidden service handles a
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malformed BEGIN cell. This bug resulted in the service crashing
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triggered by a tor_assert(). Fixes bug 22493, tracked as
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TROVE-2017-004 and as CVE-2017-0375; bugfix on tor-0.3.0.1-alpha.
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Found by armadev.
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@ -3091,14 +3091,21 @@ connection_exit_begin_conn(cell_t *cell, circuit_t *circ)
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char *address = NULL;
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uint16_t port = 0;
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or_circuit_t *or_circ = NULL;
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origin_circuit_t *origin_circ = NULL;
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crypt_path_t *layer_hint = NULL;
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const or_options_t *options = get_options();
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begin_cell_t bcell;
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int rv;
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uint8_t end_reason=0;
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assert_circuit_ok(circ);
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if (!CIRCUIT_IS_ORIGIN(circ))
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if (!CIRCUIT_IS_ORIGIN(circ)) {
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or_circ = TO_OR_CIRCUIT(circ);
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} else {
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tor_assert(circ->purpose == CIRCUIT_PURPOSE_S_REND_JOINED);
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origin_circ = TO_ORIGIN_CIRCUIT(circ);
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layer_hint = origin_circ->cpath->prev;
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}
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relay_header_unpack(&rh, cell->payload);
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if (rh.length > RELAY_PAYLOAD_SIZE)
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@ -3123,7 +3130,7 @@ connection_exit_begin_conn(cell_t *cell, circuit_t *circ)
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return -END_CIRC_REASON_TORPROTOCOL;
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} else if (rv == -1) {
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tor_free(bcell.address);
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relay_send_end_cell_from_edge(rh.stream_id, circ, end_reason, NULL);
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relay_send_end_cell_from_edge(rh.stream_id, circ, end_reason, layer_hint);
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return 0;
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}
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@ -3160,7 +3167,7 @@ connection_exit_begin_conn(cell_t *cell, circuit_t *circ)
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if (!directory_permits_begindir_requests(options) ||
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circ->purpose != CIRCUIT_PURPOSE_OR) {
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relay_send_end_cell_from_edge(rh.stream_id, circ,
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END_STREAM_REASON_NOTDIRECTORY, NULL);
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END_STREAM_REASON_NOTDIRECTORY, layer_hint);
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return 0;
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}
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/* Make sure to get the 'real' address of the previous hop: the
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@ -3177,7 +3184,7 @@ connection_exit_begin_conn(cell_t *cell, circuit_t *circ)
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} else {
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log_warn(LD_BUG, "Got an unexpected command %d", (int)rh.command);
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relay_send_end_cell_from_edge(rh.stream_id, circ,
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END_STREAM_REASON_INTERNAL, NULL);
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END_STREAM_REASON_INTERNAL, layer_hint);
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return 0;
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}
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@ -3188,7 +3195,7 @@ connection_exit_begin_conn(cell_t *cell, circuit_t *circ)
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if (bcell.flags & BEGIN_FLAG_IPV4_NOT_OK) {
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tor_free(address);
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relay_send_end_cell_from_edge(rh.stream_id, circ,
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END_STREAM_REASON_EXITPOLICY, NULL);
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END_STREAM_REASON_EXITPOLICY, layer_hint);
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return 0;
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}
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}
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@ -3211,7 +3218,7 @@ connection_exit_begin_conn(cell_t *cell, circuit_t *circ)
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n_stream->deliver_window = STREAMWINDOW_START;
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if (circ->purpose == CIRCUIT_PURPOSE_S_REND_JOINED) {
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origin_circuit_t *origin_circ = TO_ORIGIN_CIRCUIT(circ);
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tor_assert(origin_circ);
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log_info(LD_REND,"begin is for rendezvous. configuring stream.");
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n_stream->base_.address = tor_strdup("(rendezvous)");
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n_stream->base_.state = EXIT_CONN_STATE_CONNECTING;
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@ -3231,7 +3238,7 @@ connection_exit_begin_conn(cell_t *cell, circuit_t *circ)
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* the hidden service. */
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relay_send_end_cell_from_edge(rh.stream_id, circ,
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END_STREAM_REASON_DONE,
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origin_circ->cpath->prev);
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layer_hint);
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connection_free(TO_CONN(n_stream));
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tor_free(address);
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