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Re: [tor-bugs] #16052 [Tor]: Hidden service socket exhaustion by opening many connections
#16052: Hidden service socket exhaustion by opening many connections
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Reporter: asn | Owner:
Type: defect | Status: new
Priority: normal | Milestone: Tor: 0.2.7.x-final
Component: Tor | Version:
Resolution: | Keywords: tor-hs dos SponsorR SponsorU
Actual Points: | Parent ID:
Points: |
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Comment (by asn):
Here is some profiling output of the attack without Yawning's patch:
{{{
+ 58.34% tor circuit_receive_relay_cell
+ 5.11% tor logv
+ 4.93% tor smartlist_contains
+ 1.43% tor connection_bucket_refill
+ 1.15% tor curve25519_donna
+ 0.94% tor assert_circuit_ok
+ 0.91% tor scan_unsigned
+ 0.89% tor smartlist_remove
+ 0.88% tor log_fn_
+ 0.74% tor tor_vsnprintf
+ 0.64% tor tor_snprintf
+ 0.64% tor tor_memeq
+ 0.62% tor node_get_prim_orport
+ 0.62% tor tor_mutex_release
+ 0.57% tor write_all
+ 0.45% tor buf_datalen
+ 0.42% tor siphash24
+ 0.41% tor connection_exit_begin_conn
+ 0.39% tor assert_cpath_layer_ok
+ 0.35% tor run_connection_housekeeping
+ 0.34% tor relay_send_command_from_edge_
+ 0.34% tor assert_connection_ok
+ 0.33% tor compute_weighted_bandwidths
+ 0.31% tor connection_handle_read
+ 0.30% tor tor_gettimeofday
+ 0.28% tor node_is_dir
+ 0.27% tor command_process_cell
+ 0.26% tor connection_or_process_cells_from_inbuf
+ 0.26% tor tor_localtime_r
+ 0.25% tor rend_service_set_connection_addr_port
+ 0.25% tor circuitmux_find_map_entry
}}}
--
Ticket URL: <https://trac.torproject.org/projects/tor/ticket/16052#comment:16>
Tor Bug Tracker & Wiki <https://trac.torproject.org/>
The Tor Project: anonymity online
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