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From Ben Reser <...@reser.org>
Subject Re: Recent Heartbleed OpenSSL bug may affect HTTPS Subversion servers
Date Mon, 14 Apr 2014 17:47:12 GMT
On 4/12/14, 3:41 PM, Nico Kadel-Garcia wrote:
> For our own safety and benefito of combined HTTP/HTTPS servers for
> Subversion worldwide: is there a published test to verify that HTTP
> servers do not have the same flaw due to also being configured for
> SSL?

Stefan Sperling replied to you on the dev list already, but I think it's worth
answering here again since there's a different audience here.

A HTTP server that has no ports enabled to use SSL but that has mod_ssl is not
vunlerable.  This is the case because the issue only occurs when using the
heartbeat extension of TLS (which requires an SSL/TLS enabled connection).

However, servers that have both HTTP and HTTPS ports enabled may leak
information about the HTTP only traffic via the HTTPS connections.  I wouldn't
be surprised if people have servers with public facing connections that are SSL
enabled but internal only connections that do not use SSL at all.

Consider this scenario.  You have a public website with SSL enabled and a SVN
repository (not SSL enabled) that's only accessible on your own private network
(probably even on private address space).  You are using the same httpd
instance to host both.  It is possible that information ranging from
authentication details, tree structure, to even full file contents can be
leaked by the SSL connection about the HTTP SVN connections.

Essentially anything in memory of a process utilizing a vulnerable version of
OpenSSL to implement the heartbeat extension to TLS is subject to being
revealed to clients of the TLS connections.



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