I have reviewed this document as part of the security directorate's 
ongoing effort to review all IETF documents being processed by the 
IESG.  These comments were written primarily for the benefit of the 
security area directors.  Document editors and WG chairs should treat 
these comments just like any other last call comments.

The summary of the review is: Ready with one comment


The security considerations section describes two potential recovery mechanisms to an injection attack. The first option is to close the TCP connection and let the originator recreate it. The second option is a re-sync mechanism. 
The way I read the document, it seems that the first option is the recommended one, but it is not clear to me when should the second option be used, if at all. It would be great if some text be added to clarify this.