It seems there is a vulnerability in the TCP protocol that can cause existing connections to be reset. This will affect BGP sessions without an MD5 authentication. Now you understand why everybody was so urgent on settingup MD5 sessions ? :)
The complete scope can be found
here
There may be more discussions about this on NANOG.
ISPs that peer with
Unilogic Networks (AS28788) can contact me to setup a secure MD5 peering session!