[tor-bugs] #4592 [Tor Relay]: tor_tls_server_info_callback(): SSL3_ST_SW_SRVR_HELLO_B missed.

Tue Nov 29 20:29:45 UTC 2011

#4592: tor_tls_server_info_callback(): SSL3_ST_SW_SRVR_HELLO_B missed.
-----------------------+----------------------------------------------------
 Reporter:  troll_un   |          Owner:                    
     Type:  defect     |         Status:  new               
 Priority:  normal     |      Milestone:  Tor: 0.2.2.x-final
Component:  Tor Relay  |        Version:  Tor: 0.2.2.34     
 Keywords:             |         Parent:                    
   Points:             |   Actualpoints:                    
-----------------------+----------------------------------------------------

Comment(by Sebastian):

 {{{
 < frosty_un> oh puppets we are wrong, it's not about blocking tor
 protocol, it's about downgrade from v2 to v1 by enemy. not sure what is
 worsiest thing.
 < frosty_un> we are talkking about expoiting #4592.
 < frosty_un> HMAcs easy bypassing with tcp window, nice isn't?
 < frosty_un>  viva la "This check is redundant". no rollback attack, only
 blocking tor protocol: server thinks it's a v2 while client using conn
 like v1.
 }}}

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/4592#comment:2>
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