Last Call Review of draft-ietf-pce-association-diversity-10
review-ietf-pce-association-diversity-10-secdir-lc-shekh-yusef-2019-10-13-00

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.

This document adds new extension to the PCEP protocol to allow a PCC 
to request the PCE to make sure that an LSP belongs to a disjoint group.

The PCEP is an existing protocol with well-defined security properties, 
and this document builds on that. The security section discusses the 
consequences if this new mechanism is abused and the attacker is able 
to inject a fake LSP into a disjoint group. The security section also 
discusses the potential leak of non-sensitive information and the fact 
that this new mechanism could make it easier on the attacker to obtain 
this information if the protocol is not secured properly.

The document this recommends the use of TLS to secure the interface between 
the PCC and the PCE to address the above potential issues.