MILE Working Group S. Banghart
Internet-Draft NIST
Intended status: Informational March 26, 2019
Expires: September 27, 2019
Definition of ROLIE Vulnerability Extension
draft-banghart-mile-rolie-vuln-00
Abstract
This document extends the Resource-Oriented Lightweight Information
Exchange (ROLIE) core to add the information type categories and
related requirements needed to support Vulnerability use cases. The
vulnerability information type is defined as a ROLIE extensions.
Additional supporting requirements are also defined that describe the
use of specific formats and link relations pertaining to the new
information type.
Status of This Memo
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This Internet-Draft will expire on September 27, 2019.
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Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 2
2. Terminology . . . . . . . . . . . . . . . . . . . . . . . . . 2
3. Information-type Extensions . . . . . . . . . . . . . . . . . 2
3.1. The "vulnerability" information type . . . . . . . . . . 3
4. Use of the rolie:format element . . . . . . . . . . . . . . . 3
4.1. CVE Format . . . . . . . . . . . . . . . . . . . . . . . 3
4.2. VDO Format . . . . . . . . . . . . . . . . . . . . . . . 3
5. rolie:property Extensions . . . . . . . . . . . . . . . . . . 3
5.1. urn:ietf:params:rolie:property:vuln:ID . . . . . . . . . 3
6. Use of the atom:link element . . . . . . . . . . . . . . . . 3
6.1. Link relations for the 'vulnerability'
information-type . . . . . . . . . . . . . . . . . . . . 4
7. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 4
7.1. information-type registrations . . . . . . . . . . . . . 4
7.1.1. vulnerability information-type . . . . . . . . . . . 4
7.2. rolie:property name registrations . . . . . . . . . . . . 4
7.2.1. property:vulnerability:id . . . . . . . . . . . . . . 4
8. Security Considerations . . . . . . . . . . . . . . . . . . . 5
9. Normative References . . . . . . . . . . . . . . . . . . . . 5
Author's Address . . . . . . . . . . . . . . . . . . . . . . . . 5
1. Introduction
Vulnerability information sharing is one of the main use cases listed
in RFC8322. This document provides additional format specific
requirements to support interoperability and rich metadata of
vulnerability information shared using ROLIE.
2. Terminology
The key words "MUST," "MUST NOT," "REQUIRED," "SHALL," "SHALL NOT,"
"SHOULD," "SHOULD NOT," "RECOMMENDED," "MAY," and "OPTIONAL" in this
document are to be interpreted as described in [RFC2119].
Definitions for some of the common computer security-related
terminology used in this document can be found in [RFC4949].
3. Information-type Extensions
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3.1. The "vulnerability" information type
The "vulnerability" information type represents any information
describing or pertaining to a computer security vulnerability. This
document uses the definition of vulnerability provided by [RFC4949].
Provided below is a non-exhaustive list of information that may be
considered to be of a vulnerability information type.
o TODO
Note again that this list is not exhaustive, any information that in
is the abstract realm of an vulnerability should be classified under
this information-type.
4. Use of the rolie:format element
4.1. CVE Format
Todo
4.2. VDO Format
Todo
5. rolie:property Extensions
This document provides new registrations for valid rolie:property
names. These properties provide optional exposure point for valuable
information in the linked content document. Exposing this
information in a rolie:property element means that clients do not
need to download the linked document to determine if it contains the
information they are looking for.
5.1. urn:ietf:params:rolie:property:vuln:ID
Provides an XML element that can be populated with an identifier from
the vulnerability document linked to by an atom:content element.
This value SHOULD be a uniquely identifying value for the document
linked to in this entry's atom:content element.
6. Use of the atom:link element
These sections define requirements for atom:link elements in Entries.
Note that the requirements are determined by the information type
that appears in either the Entry or in the parent Feed.
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6.1. Link relations for the 'vulnerability' information-type
If the category of an Entry is the vulnerability information type,
then the following requirements MUST be followed for support of
atom:link elements.
+------+-------------+-------------+
| Name | Description | Conformance |
+------+-------------+-------------+
| todo | todo | todo |
+------+-------------+-------------+
Table 1: Link Relations for Resource-Oriented Lightweight Indicator
Exchange
7. IANA Considerations
7.1. information-type registrations
IANA has added the following entries to the "ROLIE Security Resource
Information Type Sub-Registry" registry located at
<https://www.iana.org/assignments/rolie/category/information-type> .
7.1.1. vulnerability information-type
The entry is as follows:
name: vulnerability
index: TBD
reference: This document, Section 3.1
7.2. rolie:property name registrations
IANA has added the following entries to the "ROLIE URN Parameters"
registry located in <https://www.iana.org/assignments/rolie/>.
7.2.1. property:vulnerability:id
The entry is as follows:
name: property:vulnerability:id
Extension IRI: urn:ietf:params:rolie:property:vulnerability:id
Reference: This document, section 6.3.1
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Subregistry: None
8. Security Considerations
This document implies the use of ROLIE in high-security use cases, as
such, added care should be taken to fortify and secure ROLIE
repositories and clients using this extension. The guidance in the
ROLIE core specification is strongly recommended, and implementers
should consider adding additional security measures as they see fit.
When providing a private workspace for closed sharing, it is
recommended that the ROLIE repository checks user authorization when
the user sends a GET request to the service document. If the user is
not authorized to send any requests to a given workspace or
collection, that workspace or collection should be truncated from the
service document in the response. In this way the existence of
unauthorized content remains unknown to potential attackers,
hopefully reducing attack surface.
9. Normative References
[RFC2119] Bradner, S., "Key words for use in RFCs to Indicate
Requirement Levels", BCP 14, RFC 2119,
DOI 10.17487/RFC2119, March 1997,
<https://www.rfc-editor.org/info/rfc2119>.
[RFC4287] Nottingham, M., Ed. and R. Sayre, Ed., "The Atom
Syndication Format", RFC 4287, DOI 10.17487/RFC4287,
December 2005, <https://www.rfc-editor.org/info/rfc4287>.
[RFC4949] Shirey, R., "Internet Security Glossary, Version 2",
FYI 36, RFC 4949, DOI 10.17487/RFC4949, August 2007,
<https://www.rfc-editor.org/info/rfc4949>.
[RFC5023] Gregorio, J., Ed. and B. de hOra, Ed., "The Atom
Publishing Protocol", RFC 5023, DOI 10.17487/RFC5023,
October 2007, <https://www.rfc-editor.org/info/rfc5023>.
[RFC8322] Field, J., Banghart, S., and D. Waltermire, "Resource-
Oriented Lightweight Information Exchange (ROLIE)",
RFC 8322, DOI 10.17487/RFC8322, February 2018,
<https://www.rfc-editor.org/info/rfc8322>.
Author's Address
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Stephen A. Banghart
National Institute of Standards and Technology
100 Bureau Drive
Gaithersburg, Maryland
USA
Phone: (301)975-4288
Email: sab3@nist.gov
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