FreeBSD -- TCP IPv6 SYN cache kernel information disclosure
When a TCP server transmits or retransmits a TCP SYN-ACK segment
over IPv6, the Traffic Class field is not initialized. This also
applies to challenge ACK segments, which are sent in response to
received RST segments during the TCP connection setup phase.
For each TCP SYN-ACK (or challenge TCP-ACK) segment sent over IPv6,
one byte of kernel memory is transmitted over the network.
Copyright © 2003-2005 Jacques Vidrine and contributors.
Please see the source of this document for full copyright