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Fixed the code that checks if an address the server is planning

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to hand out is in a reserved range.  This would appear as
the server being out of addresses in pools with particular ranges.
[ISC-Bugs #26498]
This commit is contained in:
Shawn Routhier 2012-01-05 00:03:18 +00:00
parent dc6908b477
commit de6c9af6dd
5 changed files with 150 additions and 77 deletions
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5
RELNOTES
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@ -61,6 +61,11 @@ work on other platforms. Please report any problems and suggested fixes to
[ISC-Bugs #27078]
CVE: CVE-2011-4868
- Fixed the code that checks if an address the server is planning
to hand out is in a reserved range. This would appear as
the server being out of addresses in pools with particular ranges.
[ISC-Bugs #26498]
Changes since 4.2.2
- Fix the code that checks for an existing DDNS transaction to cancel

12
doc/References.html
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@ -145,7 +145,7 @@
<tr><td class="header">ISC-DHCP-REFERENCES</td><td class="header">D. Hankins</td></tr>
<tr><td class="header">&nbsp;</td><td class="header">T. Mrugalski</td></tr>
<tr><td class="header">&nbsp;</td><td class="header">ISC</td></tr>
<tr><td class="header">&nbsp;</td><td class="header">May 20, 2011</td></tr>
<tr><td class="header">&nbsp;</td><td class="header">January 04, 2012</td></tr>
</table></td></tr></table>
<h1><br />ISC DHCP References Collection</h1>
@ -740,6 +740,10 @@ DHCPv6 Protocol References</h3>
<p>Precisely how to correctly support the above conundrums has not
quite yet been settled, so support is incomplete.
</p>
<p><a class='info' href='#RFC5453'>[RFC5453]<span> (</span><span class='info'>Krishnan, S., &ldquo;Reserved IPv6 Interface Identifiers,&rdquo; February&nbsp;2009.</span><span>)</span></a> creates a registry at IANA to reserve
interface identifiers and specifies a starting set. These IIDs should
not be used when constructing addresses to avoid possible conflicts.
</p>
<a name="anchor20"></a><br /><hr />
<table summary="layout" cellpadding="0" cellspacing="2" class="TOCbug" align="right"><tr><td class="TOCbug"><a href="#toc">&nbsp;TOC&nbsp;</a></td></tr></table>
<a name="rfc.section.6.2"></a><h3>6.2.&nbsp;
@ -974,14 +978,16 @@ References</h3>
<td class="author-text">Zeng, S., Volz, B., Kinnear, K., and J. Brzozowski, &ldquo;<a href="http://tools.ietf.org/html/rfc4994">DHCPv6 Relay Agent Echo Request Option</a>,&rdquo; RFC&nbsp;4994, September&nbsp;2007 (<a href="http://www.rfc-editor.org/rfc/rfc4994.txt">TXT</a>).</td></tr>
<tr><td class="author-text" valign="top"><a name="RFC5007">[RFC5007]</a></td>
<td class="author-text">Brzozowski, J., Kinnear, K., Volz, B., and S. Zeng, &ldquo;<a href="http://tools.ietf.org/html/rfc5007">DHCPv6 Leasequery</a>,&rdquo; RFC&nbsp;5007, September&nbsp;2007 (<a href="http://www.rfc-editor.org/rfc/rfc5007.txt">TXT</a>).</td></tr>
<tr><td class="author-text" valign="top"><a name="RFC5453">[RFC5453]</a></td>
<td class="author-text">Krishnan, S., &ldquo;<a href="http://tools.ietf.org/html/rfc5453">Reserved IPv6 Interface Identifiers</a>,&rdquo; RFC&nbsp;5453, February&nbsp;2009 (<a href="http://www.rfc-editor.org/rfc/rfc5453.txt">TXT</a>).</td></tr>
<tr><td class="author-text" valign="top"><a name="RFC5460">[RFC5460]</a></td>
<td class="author-text">Stapp, M., &ldquo;<a href="http://tools.ietf.org/html/rfc5460">DHCPv6 Bulk Leasequery</a>,&rdquo; RFC&nbsp;5460, February&nbsp;2009 (<a href="http://www.rfc-editor.org/rfc/rfc5460.txt">TXT</a>).</td></tr>
<tr><td class="author-text" valign="top"><a name="I-D.ietf-mif-dhcpv6-route-option">[I-D.ietf-mif-dhcpv6-route-option]</a></td>
<td class="author-text">Dec, W., Mrugalski, T., Sun, T., and B. Sarikaya, &ldquo;<a href="http://tools.ietf.org/html/draft-ietf-mif-dhcpv6-route-option-01">DHCPv6 Route Option</a>,&rdquo; draft-ietf-mif-dhcpv6-route-option-01 (work in progress), March&nbsp;2011 (<a href="http://www.ietf.org/internet-drafts/draft-ietf-mif-dhcpv6-route-option-01.txt">TXT</a>).</td></tr>
<td class="author-text">Dec, W., Mrugalski, T., Sun, T., and B. Sarikaya, &ldquo;<a href="http://tools.ietf.org/html/draft-ietf-mif-dhcpv6-route-option-03">DHCPv6 Route Options</a>,&rdquo; draft-ietf-mif-dhcpv6-route-option-03 (work in progress), September&nbsp;2011 (<a href="http://www.ietf.org/internet-drafts/draft-ietf-mif-dhcpv6-route-option-03.txt">TXT</a>).</td></tr>
<tr><td class="author-text" valign="top"><a name="I-D.ietf-dhc-dhcpv6-ldra">[I-D.ietf-dhc-dhcpv6-ldra]</a></td>
<td class="author-text">Miles, D., Ooghe, S., Dec, W., Krishnan, S., and A. Kavanagh, &ldquo;<a href="http://tools.ietf.org/html/draft-ietf-dhc-dhcpv6-ldra-03">Lightweight DHCPv6 Relay Agent</a>,&rdquo; draft-ietf-dhc-dhcpv6-ldra-03 (work in progress), October&nbsp;2010 (<a href="http://www.ietf.org/internet-drafts/draft-ietf-dhc-dhcpv6-ldra-03.txt">TXT</a>).</td></tr>
<tr><td class="author-text" valign="top"><a name="I-D.ietf-dhc-dhcpv6-relay-supplied-options">[I-D.ietf-dhc-dhcpv6-relay-supplied-options]</a></td>
<td class="author-text">Lemon, T. and W. Wu, &ldquo;<a href="http://tools.ietf.org/html/draft-ietf-dhc-dhcpv6-relay-supplied-options-06">Relay-Supplied DHCP Options</a>,&rdquo; draft-ietf-dhc-dhcpv6-relay-supplied-options-06 (work in progress), May&nbsp;2011 (<a href="http://www.ietf.org/internet-drafts/draft-ietf-dhc-dhcpv6-relay-supplied-options-06.txt">TXT</a>).</td></tr>
<td class="author-text">Lemon, T. and W. Wu, &ldquo;<a href="http://tools.ietf.org/html/draft-ietf-dhc-dhcpv6-relay-supplied-options-09">Relay-Supplied DHCP Options</a>,&rdquo; draft-ietf-dhc-dhcpv6-relay-supplied-options-09 (work in progress), September&nbsp;2011 (<a href="http://www.ietf.org/internet-drafts/draft-ietf-dhc-dhcpv6-relay-supplied-options-09.txt">TXT</a>).</td></tr>
<tr><td class="author-text" valign="top"><a name="I-D.ietf-dhc-pd-exclude">[I-D.ietf-dhc-pd-exclude]</a></td>
<td class="author-text">Korhonen, J., Savolainen, T., Krishnan, S., and O. Troan, &ldquo;<a href="http://tools.ietf.org/html/draft-ietf-dhc-pd-exclude-01">Prefix Exclude Option for DHCPv6-based Prefix Delegation</a>,&rdquo; draft-ietf-dhc-pd-exclude-01 (work in progress), January&nbsp;2011 (<a href="http://www.ietf.org/internet-drafts/draft-ietf-dhc-pd-exclude-01.txt">TXT</a>).</td></tr>
<tr><td class="author-text" valign="top"><a name="I-D.ietf-dhc-secure-dhcpv6">[I-D.ietf-dhc-secure-dhcpv6]</a></td>

190
doc/References.txt
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@ -4,7 +4,7 @@
ISC-DHCP-REFERENCES D. Hankins
T. Mrugalski
ISC
May 20, 2011
January 04, 2012
ISC DHCP References Collection
@ -54,7 +54,7 @@ Copyright Notice
Hankins & Mrugalski [Page 1]
ISC DHCP References Collection May 2011
ISC DHCP References Collection January 2012
Table of Contents
@ -110,7 +110,7 @@ Table of Contents
Hankins & Mrugalski [Page 2]
ISC DHCP References Collection May 2011
ISC DHCP References Collection January 2012
1. Introduction
@ -166,7 +166,7 @@ Hankins & Mrugalski [Page 2]
Hankins & Mrugalski [Page 3]
ISC DHCP References Collection May 2011
ISC DHCP References Collection January 2012
o To produce new externally-visible behaviour, one must first
@ -222,7 +222,7 @@ Hankins & Mrugalski [Page 3]
Hankins & Mrugalski [Page 4]
ISC DHCP References Collection May 2011
ISC DHCP References Collection January 2012
address yet) interface.
@ -278,7 +278,7 @@ Hankins & Mrugalski [Page 4]
Hankins & Mrugalski [Page 5]
ISC DHCP References Collection May 2011
ISC DHCP References Collection January 2012
now unicast without ARP by inserting an entry into the ARP cache
@ -334,7 +334,7 @@ Hankins & Mrugalski [Page 5]
Hankins & Mrugalski [Page 6]
ISC DHCP References Collection May 2011
ISC DHCP References Collection January 2012
5. DHCPv4 Protocol References
@ -390,7 +390,7 @@ Hankins & Mrugalski [Page 6]
Hankins & Mrugalski [Page 7]
ISC DHCP References Collection May 2011
ISC DHCP References Collection January 2012
RFC2485 [RFC2485] defines the Open Group's UAP option.
@ -446,7 +446,7 @@ Hankins & Mrugalski [Page 7]
Hankins & Mrugalski [Page 8]
ISC DHCP References Collection May 2011
ISC DHCP References Collection January 2012
5.2.1. Relay Agent Information Option Options
@ -502,7 +502,7 @@ Hankins & Mrugalski [Page 8]
Hankins & Mrugalski [Page 9]
ISC DHCP References Collection May 2011
ISC DHCP References Collection January 2012
this document was edited, and the authors no longer show any interest
@ -558,7 +558,7 @@ Hankins & Mrugalski [Page 9]
Hankins & Mrugalski [Page 10]
ISC DHCP References Collection May 2011
ISC DHCP References Collection January 2012
IA_NAs within one packet from the client, our client only supports
@ -586,6 +586,10 @@ Hankins & Mrugalski [Page 10]
Precisely how to correctly support the above conundrums has not quite
yet been settled, so support is incomplete.
[RFC5453] creates a registry at IANA to reserve interface identifiers
and specifies a starting set. These IIDs should not be used when
constructing addresses to avoid possible conflicts.
6.2. DHCPv6 Options References
[RFC3319] defines the SIP server options for DHCPv6.
@ -605,18 +609,19 @@ Hankins & Mrugalski [Page 10]
[RFC4242] defines the Information Refresh Time option, which advises
DHCPv6 Information-Request clients to return for updated information.
[RFC4280] defines two BCMS server options for each protocol family.
[RFC4580] defines a DHCPv6 subscriber-id option, which is similar in
principle to the DHCPv4 relay agent option of the same name.
Hankins & Mrugalski [Page 11]
ISC DHCP References Collection May 2011
ISC DHCP References Collection January 2012
[RFC4280] defines two BCMS server options for each protocol family.
[RFC4580] defines a DHCPv6 subscriber-id option, which is similar in
principle to the DHCPv4 relay agent option of the same name.
[RFC4649] defines a DHCPv6 remote-id option, which is similar in
principle to the DHCPv4 relay agent remote-id.
@ -661,18 +666,17 @@ Hankins & Mrugalski [Page 11]
[RFC2485] Drach, S., "DHCP Option for The Open Group's User
Authentication Protocol", RFC 2485, January 1999.
[RFC2563] Troll, R., "DHCP Option to Disable Stateless Auto-
Configuration in IPv4 Clients", RFC 2563, May 1999.
[RFC2610] Perkins, C. and E. Guttman, "DHCP Options for Service
Hankins & Mrugalski [Page 12]
ISC DHCP References Collection May 2011
ISC DHCP References Collection January 2012
[RFC2563] Troll, R., "DHCP Option to Disable Stateless Auto-
Configuration in IPv4 Clients", RFC 2563, May 1999.
[RFC2610] Perkins, C. and E. Guttman, "DHCP Options for Service
Location Protocol", RFC 2610, June 1999.
[RFC2855] Fujisawa, K., "DHCP for IEEE 1394", RFC 2855, June 2000.
@ -717,18 +721,18 @@ Hankins & Mrugalski [Page 12]
November 2002.
[RFC3397] Aboba, B. and S. Cheshire, "Dynamic Host Configuration
Protocol (DHCP) Domain Search Option", RFC 3397,
November 2002.
[RFC3442] Lemon, T., Cheshire, S., and B. Volz, "The Classless
Hankins & Mrugalski [Page 13]
ISC DHCP References Collection May 2011
ISC DHCP References Collection January 2012
Protocol (DHCP) Domain Search Option", RFC 3397,
November 2002.
[RFC3442] Lemon, T., Cheshire, S., and B. Volz, "The Classless
Static Route Option for Dynamic Host Configuration
Protocol (DHCP) version 4", RFC 3442, December 2002.
@ -773,18 +777,19 @@ Hankins & Mrugalski [Page 13]
Suboption for the Dynamic Host Configuration Protocol
(DHCP) Relay Agent Option", RFC 3993, March 2005.
[RFC4014] Droms, R. and J. Schnizlein, "Remote Authentication
Dial-In User Service (RADIUS) Attributes Suboption for the
Dynamic Host Configuration Protocol (DHCP) Relay Agent
Information Option", RFC 4014, February 2005.
Hankins & Mrugalski [Page 14]
ISC DHCP References Collection May 2011
ISC DHCP References Collection January 2012
[RFC4014] Droms, R. and J. Schnizlein, "Remote Authentication
Dial-In User Service (RADIUS) Attributes Suboption for the
Dynamic Host Configuration Protocol (DHCP) Relay Agent
Information Option", RFC 4014, February 2005.
[RFC4030] Stapp, M. and T. Lemon, "The Authentication Suboption for
the Dynamic Host Configuration Protocol (DHCP) Relay Agent
Option", RFC 4030, March 2005.
@ -829,18 +834,17 @@ Hankins & Mrugalski [Page 14]
Configuration Protocol (DHCP) Clients", RFC 4703,
October 2006.
[RFC5010] Kinnear, K., Normoyle, M., and M. Stapp, "The Dynamic Host
Configuration Protocol Version 4 (DHCPv4) Relay Agent
Flags Suboption", RFC 5010, September 2007.
Hankins & Mrugalski [Page 15]
ISC DHCP References Collection May 2011
ISC DHCP References Collection January 2012
[RFC5010] Kinnear, K., Normoyle, M., and M. Stapp, "The Dynamic Host
Configuration Protocol Version 4 (DHCPv4) Relay Agent
Flags Suboption", RFC 5010, September 2007.
[RFC5071] Hankins, D., "Dynamic Host Configuration Protocol Options
Used by PXELINUX", RFC 5071, December 2007.
@ -885,18 +889,19 @@ Hankins & Mrugalski [Page 15]
draft-ietf-dhc-leasequery-by-remote-id-09 (work in
progress), December 2010.
[I-D.ietf-dhc-relay-id-suboption]
Stapp, M., "The DHCPv4 Relay Agent Identifier Suboption",
draft-ietf-dhc-relay-id-suboption-07 (work in progress),
July 2009.
Hankins & Mrugalski [Page 16]
ISC DHCP References Collection May 2011
ISC DHCP References Collection January 2012
[I-D.ietf-dhc-relay-id-suboption]
Stapp, M., "The DHCPv4 Relay Agent Identifier Suboption",
draft-ietf-dhc-relay-id-suboption-07 (work in progress),
July 2009.
[I-D.ietf-mip6-hiopt]
Jang, H., Yegin, A., Chowdhury, K., and J. Choi, "DHCP
Options for Home Information Discovery in MIPv6",
@ -941,18 +946,17 @@ Hankins & Mrugalski [Page 16]
Location Information Server (LIS)", RFC 5986,
September 2010.
[I-D.ietf-dhc-vpn-option]
Kinnear, K., Johnson, R., and M. Stapp, "Virtual Subnet
Selection Options for DHCPv4 and DHCPv6",
draft-ietf-dhc-vpn-option-12 (work in progress),
Hankins & Mrugalski [Page 17]
ISC DHCP References Collection May 2011
ISC DHCP References Collection January 2012
[I-D.ietf-dhc-vpn-option]
Kinnear, K., Johnson, R., and M. Stapp, "Virtual Subnet
Selection Options for DHCPv4 and DHCPv6",
draft-ietf-dhc-vpn-option-12 (work in progress),
October 2010.
7.3. Published DHCPv6 References
@ -997,18 +1001,18 @@ Hankins & Mrugalski [Page 17]
[RFC4649] Volz, B., "Dynamic Host Configuration Protocol for IPv6
(DHCPv6) Relay Agent Remote-ID Option", RFC 4649,
August 2006.
[RFC4704] Volz, B., "The Dynamic Host Configuration Protocol for
IPv6 (DHCPv6) Client Fully Qualified Domain Name (FQDN)
Hankins & Mrugalski [Page 18]
ISC DHCP References Collection May 2011
ISC DHCP References Collection January 2012
August 2006.
[RFC4704] Volz, B., "The Dynamic Host Configuration Protocol for
IPv6 (DHCPv6) Client Fully Qualified Domain Name (FQDN)
Option", RFC 4704, October 2006.
[RFC4994] Zeng, S., Volz, B., Kinnear, K., and J. Brzozowski,
@ -1018,13 +1022,16 @@ Hankins & Mrugalski [Page 18]
[RFC5007] Brzozowski, J., Kinnear, K., Volz, B., and S. Zeng,
"DHCPv6 Leasequery", RFC 5007, September 2007.
[RFC5453] Krishnan, S., "Reserved IPv6 Interface Identifiers",
RFC 5453, February 2009.
[RFC5460] Stapp, M., "DHCPv6 Bulk Leasequery", RFC 5460,
February 2009.
[I-D.ietf-mif-dhcpv6-route-option]
Dec, W., Mrugalski, T., Sun, T., and B. Sarikaya, "DHCPv6
Route Option", draft-ietf-mif-dhcpv6-route-option-01 (work
in progress), March 2011.
Route Options", draft-ietf-mif-dhcpv6-route-option-03
(work in progress), September 2011.
[I-D.ietf-dhc-dhcpv6-ldra]
Miles, D., Ooghe, S., Dec, W., Krishnan, S., and A.
@ -1034,8 +1041,8 @@ Hankins & Mrugalski [Page 18]
[I-D.ietf-dhc-dhcpv6-relay-supplied-options]
Lemon, T. and W. Wu, "Relay-Supplied DHCP Options",
draft-ietf-dhc-dhcpv6-relay-supplied-options-06 (work in
progress), May 2011.
draft-ietf-dhc-dhcpv6-relay-supplied-options-09 (work in
progress), September 2011.
[I-D.ietf-dhc-pd-exclude]
Korhonen, J., Savolainen, T., Krishnan, S., and O. Troan,
@ -1050,6 +1057,14 @@ Hankins & Mrugalski [Page 18]
[I-D.ietf-mext-nemo-pd]
Droms, R., Thubert, P., Dupont, F., Haddad, W., and C.
Hankins & Mrugalski [Page 19]
ISC DHCP References Collection January 2012
Bernardos, "DHCPv6 Prefix Delegation for NEMO",
draft-ietf-mext-nemo-pd-07 (work in progress),
December 2010.
@ -1057,14 +1072,6 @@ Hankins & Mrugalski [Page 18]
[I-D.ietf-dhc-duid-uuid]
Narten, T. and J. Johnson, "Definition of the UUID-based
DHCPv6 Unique Identifier (DUID-UUID)",
Hankins & Mrugalski [Page 19]
ISC DHCP References Collection May 2011
draft-ietf-dhc-duid-uuid-03 (work in progress),
February 2011.
@ -1100,6 +1107,20 @@ Authors' Addresses
Redwood City, CA 94063
Hankins & Mrugalski [Page 20]
ISC DHCP References Collection January 2012
Tomasz Mrugalski
Internet Systems Consortium, Inc.
950 Charter Street
@ -1116,5 +1137,40 @@ Authors' Addresses
Hankins & Mrugalski [Page 20]
Hankins & Mrugalski [Page 21]

11
doc/References.xml
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@ -1,6 +1,6 @@
<?xml version='1.0' ?>
<!-- $Id: References.xml,v 1.7 2011/07/05 16:54:53 sar Exp $ -->
<!-- $Id: References.xml,v 1.8 2012/01/05 00:03:17 sar Exp $ -->
<?rfc private="ISC-DHCP-REFERENCES" ?>
@ -92,6 +92,8 @@
'http://xml.resource.org/public/rfc/bibxml/reference.RFC.4702.xml'>
<!ENTITY rfc4703 PUBLIC ''
'http://xml.resource.org/public/rfc/bibxml/reference.RFC.4703.xml'>
<!ENTITY rfc5453 PUBLIC ''
'http://xml.resource.org/public/rfc/bibxml/reference.RFC.5453.xml'>
]>
@ -133,7 +135,7 @@
</address>
</author>
<date day="20" month="May" year="2011"/>
<date day="04" month="January" year="2012"/>
<keyword>ISC</keyword>
<keyword>DHCP</keyword>
@ -610,6 +612,10 @@
<t>Precisely how to correctly support the above conundrums has not
quite yet been settled, so support is incomplete.</t>
<t><xref target="RFC5453"/> creates a registry at IANA to reserve
interface identifiers and specifies a starting set. These IIDs should
not be used when constructing addresses to avoid possible conflicts.</t>
</section>
<section title="DHCPv6 Options References">
@ -760,6 +766,7 @@
<?rfc include='http://xml.resource.org/public/rfc/bibxml/reference.RFC.4704'?>
<?rfc include='http://xml.resource.org/public/rfc/bibxml/reference.RFC.4994'?>
<?rfc include='http://xml.resource.org/public/rfc/bibxml/reference.RFC.5007'?>
<?rfc include='http://xml.resource.org/public/rfc/bibxml/reference.RFC.5453'?>
<?rfc include='http://xml.resource.org/public/rfc/bibxml/reference.RFC.5460'?>
<?rfc include='http://xml.resource.org/public/rfc/bibxml3/reference.I-D.ietf-mif-dhcpv6-route-option'?>
<?rfc include='http://xml.resource.org/public/rfc/bibxml3/reference.I-D.ietf-dhc-dhcpv6-ldra'?>

9
server/mdb6.c
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@ -1,5 +1,5 @@
/*
* Copyright (C) 2007-2011 by Internet Systems Consortium, Inc. ("ISC")
* Copyright (C) 2007-2012 by Internet Systems Consortium, Inc. ("ISC")
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
@ -808,15 +808,14 @@ create_lease6(struct ipv6_pool *pool, struct iasubopt **addr,
}
/*
* Avoid reserved interface IDs.
* (cf. draft-krishnan-ipv6-reserved-iids-02.txt)
* Avoid reserved interface IDs. (cf. RFC 5453)
*/
reserved_iid = ISC_FALSE;
if (memcmp(&tmp.s6_addr[8], &rtany, 8) == 0) {
if (memcmp(&tmp.s6_addr[8], &rtany.s6_addr[8], 8) == 0) {
reserved_iid = ISC_TRUE;
}
if (!reserved_iid &&
(memcmp(&tmp.s6_addr[8], &resany, 7) == 0) &&
(memcmp(&tmp.s6_addr[8], &resany.s6_addr[8], 7) == 0) &&
((tmp.s6_addr[15] & 0x80) == 0x80)) {
reserved_iid = ISC_TRUE;
}