A New Internet-Draft is available from the on-line Internet-Drafts
directories.
This draft is a work item of the TCP Maintenance and Minor Extensions Working Group of the IETF.
Title : Improving TCP's Robustness to Blind In-Window Attacks
Author(s) : A. Ramaiah, et al.
Filename : draft-ietf-tcpm-tcpsecure-07.txt
Pages : 26
Date : 2007-2-23
TCP has historically been considered protected against spoofed packet
injection attacks by relying on the fact that it is difficult to
guess the 4-tuple (the source and destination IP addresses and the
source and destination ports) in combination with the 32 bit sequence
number(s). A combination of increasing window sizes and applications
using a longer term connections (e.g. H-323 or Border Gateway
Protocol [RFC4271]) have left modern TCP implementation more
vulnerable to these types of spoofed packet injection attacks.
Many of these long term TCP applications tend to have predictable IP
addresses and ports which makes it far easier for the 4-tuple to be
guessed. Having guessed the 4-tuple correctly, an attacker can
inject a RST, SYN or DATA segment into a TCP connection by carefully
crafting the sequence number of the spoofed segment to be in the
current receive window. This can cause the connection to either
abort or possibly cause data corruption. This document specifies
small modifications to the way TCP handles inbound segments that can
reduce the chances of a successful attack.
A URL for this Internet-Draft is:
http://www.ietf.org/internet-drafts/draft-ietf-tcpm-tcpsecure-07.txt
To remove yourself from the I-D Announcement list, send a message to
i-d-announce-request@ietf.org with the word unsubscribe in the body of
the message.
You can also visit https://www1.ietf.org/mailman/listinfo/I-D-announce
to change your subscription settings.
Internet-Drafts are also available by anonymous FTP. Login with the
username "anonymous" and a password of your e-mail address. After
logging in, type "cd internet-drafts" and then
"get draft-ietf-tcpm-tcpsecure-07.txt".
A list of Internet-Drafts directories can be found in
http://www.ietf.org/shadow.html
or ftp://ftp.ietf.org/ietf/1shadow-sites.txt
Internet-Drafts can also be obtained by e-mail.
Send a message to:
mailserv@ietf.org.
In the body type:
"FILE /internet-drafts/draft-ietf-tcpm-tcpsecure-07.txt".
NOTE: The mail server at ietf.org can return the document in
MIME-encoded form by using the "mpack" utility. To use this
feature, insert the command "ENCODING mime" before the "FILE"
command. To decode the response(s), you will need "munpack" or
a MIME-compliant mail reader. Different MIME-compliant mail readers
exhibit different behavior, especially when dealing with
"multipart" MIME messages (i.e. documents which have been split
up into multiple messages), so check your local documentation on
how to manipulate these messages.
Below is the data which will enable a MIME compliant mail reader
implementation to automatically retrieve the ASCII version of the
Internet-Draft.
- <ftp://ftp.ietf.org/internet-drafts/draft-ietf-tcpm-tcpsecure-07.txt>
-
_______________________________________________
I-D-Announce@ietf.org
https://www1.ietf.org/mailman/listinfo/i-d-announce
