The SSLClientSocketNSS::Core::OwnAuthCertHandler function in net/socket/ssl_client_socket_nss.cc in Google Chrome before 33.0.1750.117 does not prevent changes to server X.509 certificates during renegotiations, which allows remote SSL servers to trigger use of a new certificate chain, inconsistent with the user's expectations, by initiating a TLS renegotiation.
https://src.chromium.org/viewvc/chrome?revision=229611&view=revision
https://code.google.com/p/chromium/issues/detail?id=306959
http://www.debian.org/security/2014/dsa-2883
http://lists.opensuse.org/opensuse-updates/2014-03/msg00006.html
http://googlechromereleases.blogspot.com/2014/02/stable-channel-update_20.html