[tor-bugs] #4822 [Tor Client]: Avoid vulnerability CVE-2011-4576 : Disable SSL3?

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#4822: Avoid vulnerability CVE-2011-4576 : Disable SSL3?
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 Reporter:  nickm       |          Owner:                    
     Type:  defect      |         Status:  needs_review      
 Priority:  critical    |      Milestone:  Tor: 0.2.1.x-final
Component:  Tor Client  |        Version:                    
 Keywords:              |         Parent:                    
   Points:              |   Actualpoints:                    
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Comment(by nickm):

 Replying to [comment:11 rransom]:
 > Replying to [comment:9 nickm]:
 > > Okay, please look at branch bug4822_021_v2 in my public repository. It
 takes the SSL_OP_NO_SSLv3 approach.
 >
 > The `EVERYONE_HAS_AES` change probably belongs in a separate commit,
 although I don't think leaving it in the same commit as the disable-SSL3
 change will ever cause any trouble.

 Right; I'm inclined to leave it.

 > I still think we should use a runtime version check, not a compile-time
 version check -- people ''will'' build Tor against an old OpenSSL shared
 library and run it with a new one.

 Hm. That case is actually safe; the problem would be if they built with a
 newer one and ran with an older one.  Does that seem likely?  And
 shouldn't a decent library system prevent this?

-- 
Ticket URL: <https://trac.torproject.org/projects/tor/ticket/4822#comment:14>
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