Bug#683340: Core dump in ssl proxy

[John Williams <john@pond-weed.com>]

Package: apache2
Version: 2.2.22-9

I have got webserver A (which is apache) acting as a reverse proxy for
webserver B (which is lighttpd).
Note that I'm using the i386 version in both cases.

Webserver A is configured like this:
  SSLProxyEngine on
  SSLProxyCACertificateFile /etc/apache2/ca.crt
  SSLProxyMachineCertificateFile /etc/apache2/proxy.pem
  <Location /somewhere>
    ProxyPass https://serverb/somewhere
  </Location>

If I turn on ssl client verification on webserver B, then any attempt
to use the reverse proxy fails; webserver A returns HTTP code 500 and I
see a message like this in its error log:
  [notice] child pid 2381 exit signal Segmentation fault (11)
With client verification turned off on webserver B, everything works OK.