svn commit: r200393 - in stable/7/contrib/bind9: . bin/named
lib/dns lib/dns/include/dns
Doug Barton
dougb at FreeBSD.org
Fri Dec 11 02:23:04 UTC 2009
Author: dougb
Date: Fri Dec 11 02:23:04 2009
New Revision: 200393
URL: http://svn.freebsd.org/changeset/base/200393
Log:
Update to version 9.4.3-P4. The vulnerability this is designed to fix is
related to DNSSEC validation on a resolving name server that allows
access to untrusted users. If your system does not fall into all 3 of
these categories you do not need to update immediately.
Modified:
stable/7/contrib/bind9/CHANGES
stable/7/contrib/bind9/bin/named/query.c
stable/7/contrib/bind9/lib/dns/api
stable/7/contrib/bind9/lib/dns/include/dns/types.h
stable/7/contrib/bind9/lib/dns/masterdump.c
stable/7/contrib/bind9/lib/dns/rbtdb.c
stable/7/contrib/bind9/lib/dns/resolver.c
stable/7/contrib/bind9/lib/dns/validator.c
stable/7/contrib/bind9/version
Directory Properties:
stable/7/contrib/bind9/ (props changed)
Modified: stable/7/contrib/bind9/CHANGES
==============================================================================
--- stable/7/contrib/bind9/CHANGES Fri Dec 11 02:09:46 2009 (r200392)
+++ stable/7/contrib/bind9/CHANGES Fri Dec 11 02:23:04 2009 (r200393)
@@ -1,3 +1,9 @@
+ --- 9.4.3-P4 released ---
+
+2772. [security] When validating, track whether pending data was from
+ the additional section or not and only return it if
+ validates as secure. [RT #20438]
+
--- 9.4.3-P3 released ---
2640. [security] A specially crafted update packet will cause named
Modified: stable/7/contrib/bind9/bin/named/query.c
==============================================================================
--- stable/7/contrib/bind9/bin/named/query.c Fri Dec 11 02:09:46 2009 (r200392)
+++ stable/7/contrib/bind9/bin/named/query.c Fri Dec 11 02:23:04 2009 (r200393)
@@ -15,7 +15,7 @@
* PERFORMANCE OF THIS SOFTWARE.
*/
-/* $Id: query.c,v 1.257.18.46 2008/10/15 22:33:01 marka Exp $ */
+/* $Id: query.c,v 1.257.18.46.2.1 2009/11/19 00:25:17 marka Exp $ */
/*! \file */
@@ -109,6 +109,8 @@
#define DNS_GETDB_NOLOG 0x02U
#define DNS_GETDB_PARTIAL 0x04U
+#define PENDINGOK(x) (((x) & DNS_DBFIND_PENDINGOK) != 0)
+
typedef struct client_additionalctx {
ns_client_t *client;
dns_rdataset_t *rdataset;
@@ -1721,8 +1723,8 @@ query_addadditional2(void *arg, dns_name
*/
if (result == ISC_R_SUCCESS &&
additionaltype == dns_rdatasetadditional_fromcache &&
- (rdataset->trust == dns_trust_pending ||
- rdataset->trust == dns_trust_glue) &&
+ (DNS_TRUST_PENDING(rdataset->trust) ||
+ DNS_TRUST_GLUE(rdataset->trust)) &&
!validate(client, db, fname, rdataset, sigrdataset)) {
dns_rdataset_disassociate(rdataset);
if (dns_rdataset_isassociated(sigrdataset))
@@ -1761,8 +1763,8 @@ query_addadditional2(void *arg, dns_name
*/
if (result == ISC_R_SUCCESS &&
additionaltype == dns_rdatasetadditional_fromcache &&
- (rdataset->trust == dns_trust_pending ||
- rdataset->trust == dns_trust_glue) &&
+ (DNS_TRUST_PENDING(rdataset->trust) ||
+ DNS_TRUST_GLUE(rdataset->trust)) &&
!validate(client, db, fname, rdataset, sigrdataset)) {
dns_rdataset_disassociate(rdataset);
if (dns_rdataset_isassociated(sigrdataset))
@@ -2547,14 +2549,14 @@ query_addbestns(ns_client_t *client) {
/*
* Attempt to validate RRsets that are pending or that are glue.
*/
- if ((rdataset->trust == dns_trust_pending ||
- (sigrdataset != NULL && sigrdataset->trust == dns_trust_pending))
+ if ((DNS_TRUST_PENDING(rdataset->trust) ||
+ (sigrdataset != NULL && DNS_TRUST_PENDING(sigrdataset->trust)))
&& !validate(client, db, fname, rdataset, sigrdataset) &&
- (client->query.dboptions & DNS_DBFIND_PENDINGOK) == 0)
+ !PENDINGOK(client->query.dboptions))
goto cleanup;
- if ((rdataset->trust == dns_trust_glue ||
- (sigrdataset != NULL && sigrdataset->trust == dns_trust_glue)) &&
+ if ((DNS_TRUST_GLUE(rdataset->trust) ||
+ (sigrdataset != NULL && DNS_TRUST_GLUE(sigrdataset->trust))) &&
!validate(client, db, fname, rdataset, sigrdataset) &&
SECURE(client) && WANTDNSSEC(client))
goto cleanup;
@@ -3344,6 +3346,8 @@ query_find(ns_client_t *client, dns_fetc
isc_boolean_t empty_wild;
dns_rdataset_t *noqname;
isc_boolean_t resuming;
+ dns_rdataset_t tmprdataset;
+ unsigned int dboptions;
CTRACE("query_find");
@@ -3555,9 +3559,49 @@ query_find(ns_client_t *client, dns_fetc
/*
* Now look for an answer in the database.
*/
+ dboptions = client->query.dboptions;
+ if (sigrdataset == NULL && client->view->enablednssec) {
+ /*
+ * If the client doesn't want DNSSEC we still want to
+ * look for any data pending validation to save a remote
+ * lookup if possible.
+ */
+ dns_rdataset_init(&tmprdataset);
+ sigrdataset = &tmprdataset;
+ dboptions |= DNS_DBFIND_PENDINGOK;
+ }
+ refind:
result = dns_db_find(db, client->query.qname, version, type,
- client->query.dboptions, client->now,
- &node, fname, rdataset, sigrdataset);
+ dboptions, client->now, &node, fname,
+ rdataset, sigrdataset);
+ /*
+ * If we have found pending data try to validate it.
+ * If the data does not validate as secure and we can't
+ * use the unvalidated data requery the database with
+ * pending disabled to prevent infinite looping.
+ */
+ if (result != ISC_R_SUCCESS || !DNS_TRUST_PENDING(rdataset->trust))
+ goto validation_done;
+ if (validate(client, db, fname, rdataset, sigrdataset))
+ goto validation_done;
+ if (rdataset->trust != dns_trust_pending_answer ||
+ !PENDINGOK(client->query.dboptions)) {
+ dns_rdataset_disassociate(rdataset);
+ if (sigrdataset != NULL &&
+ dns_rdataset_isassociated(sigrdataset))
+ dns_rdataset_disassociate(sigrdataset);
+ if (sigrdataset == &tmprdataset)
+ sigrdataset = NULL;
+ dns_db_detachnode(db, &node);
+ dboptions &= ~DNS_DBFIND_PENDINGOK;
+ goto refind;
+ }
+ validation_done:
+ if (sigrdataset == &tmprdataset) {
+ if (dns_rdataset_isassociated(sigrdataset))
+ dns_rdataset_disassociate(sigrdataset);
+ sigrdataset = NULL;
+ }
resume:
CTRACE("query_find: resume");
Modified: stable/7/contrib/bind9/lib/dns/api
==============================================================================
--- stable/7/contrib/bind9/lib/dns/api Fri Dec 11 02:09:46 2009 (r200392)
+++ stable/7/contrib/bind9/lib/dns/api Fri Dec 11 02:23:04 2009 (r200393)
@@ -1,3 +1,3 @@
-LIBINTERFACE = 36
-LIBREVISION = 2
+LIBINTERFACE = 38
+LIBREVISION = 0
LIBAGE = 0
Modified: stable/7/contrib/bind9/lib/dns/include/dns/types.h
==============================================================================
--- stable/7/contrib/bind9/lib/dns/include/dns/types.h Fri Dec 11 02:09:46 2009 (r200392)
+++ stable/7/contrib/bind9/lib/dns/include/dns/types.h Fri Dec 11 02:23:04 2009 (r200393)
@@ -15,7 +15,7 @@
* PERFORMANCE OF THIS SOFTWARE.
*/
-/* $Id: types.h,v 1.109.18.12 2006/05/02 12:55:31 shane Exp $ */
+/* $Id: types.h,v 1.109.18.12.68.1 2009/11/19 00:25:18 marka Exp $ */
#ifndef DNS_TYPES_H
#define DNS_TYPES_H 1
@@ -241,40 +241,52 @@ enum {
dns_trust_none = 0,
#define dns_trust_none ((dns_trust_t)dns_trust_none)
- /*% Subject to DNSSEC validation but has not yet been validated */
- dns_trust_pending = 1,
-#define dns_trust_pending ((dns_trust_t)dns_trust_pending)
-
+ /*%
+ * Subject to DNSSEC validation but has not yet been validated
+ * dns_trust_pending_additional (from the additional section).
+ */
+ dns_trust_pending_additional = 1,
+#define dns_trust_pending_additional \
+ ((dns_trust_t)dns_trust_pending_additional)
+
+ dns_trust_pending_answer = 2,
+#define dns_trust_pending_answer ((dns_trust_t)dns_trust_pending_answer)
+
/*% Received in the additional section of a response. */
- dns_trust_additional = 2,
+ dns_trust_additional = 3,
#define dns_trust_additional ((dns_trust_t)dns_trust_additional)
-
- /* Received in a referral response. */
- dns_trust_glue = 3,
+
+ /* Received in a referral response. */
+ dns_trust_glue = 4,
#define dns_trust_glue ((dns_trust_t)dns_trust_glue)
-
- /* Answser from a non-authoritative server */
- dns_trust_answer = 4,
+
+ /* Answer from a non-authoritative server */
+ dns_trust_answer = 5,
#define dns_trust_answer ((dns_trust_t)dns_trust_answer)
-
+
/* Received in the authority section as part of an
authoritative response */
- dns_trust_authauthority = 5,
+ dns_trust_authauthority = 6,
#define dns_trust_authauthority ((dns_trust_t)dns_trust_authauthority)
- /* Answser from an authoritative server */
- dns_trust_authanswer = 6,
+ /* Answer from an authoritative server */
+ dns_trust_authanswer = 7,
#define dns_trust_authanswer ((dns_trust_t)dns_trust_authanswer)
-
- /* Successfully DNSSEC validated */
- dns_trust_secure = 7,
+
+ /* Successfully DNSSEC validated */
+ dns_trust_secure = 8,
#define dns_trust_secure ((dns_trust_t)dns_trust_secure)
/* This server is authoritative */
- dns_trust_ultimate = 8
+ dns_trust_ultimate = 9
#define dns_trust_ultimate ((dns_trust_t)dns_trust_ultimate)
};
+#define DNS_TRUST_PENDING(x) ((x) == dns_trust_pending_answer || \
+ (x) == dns_trust_pending_additional)
+#define DNS_TRUST_GLUE(x) ((x) == dns_trust_glue)
+
+
/*%
* Name checking severites.
*/
Modified: stable/7/contrib/bind9/lib/dns/masterdump.c
==============================================================================
--- stable/7/contrib/bind9/lib/dns/masterdump.c Fri Dec 11 02:09:46 2009 (r200392)
+++ stable/7/contrib/bind9/lib/dns/masterdump.c Fri Dec 11 02:23:04 2009 (r200393)
@@ -15,7 +15,7 @@
* PERFORMANCE OF THIS SOFTWARE.
*/
-/* $Id: masterdump.c,v 1.73.18.16 2008/08/13 23:46:04 tbox Exp $ */
+/* $Id: masterdump.c,v 1.73.18.16.2.1 2009/11/19 00:25:17 marka Exp $ */
/*! \file */
@@ -774,7 +774,8 @@ dump_order_compare(const void *a, const
static const char *trustnames[] = {
"none",
- "pending",
+ "pending-additional",
+ "pending-answer",
"additional",
"glue",
"answer",
Modified: stable/7/contrib/bind9/lib/dns/rbtdb.c
==============================================================================
--- stable/7/contrib/bind9/lib/dns/rbtdb.c Fri Dec 11 02:09:46 2009 (r200392)
+++ stable/7/contrib/bind9/lib/dns/rbtdb.c Fri Dec 11 02:23:04 2009 (r200393)
@@ -15,7 +15,7 @@
* PERFORMANCE OF THIS SOFTWARE.
*/
-/* $Id: rbtdb.c,v 1.196.18.53 2008/01/31 23:46:05 tbox Exp $ */
+/* $Id: rbtdb.c,v 1.196.18.53.4.1 2009/11/19 00:25:17 marka Exp $ */
/*! \file */
@@ -3072,7 +3072,7 @@ cache_zonecut_callback(dns_rbtnode_t *no
}
if (dname_header != NULL &&
- (dname_header->trust != dns_trust_pending ||
+ (!DNS_TRUST_PENDING(dname_header->trust) ||
(search->options & DNS_DBFIND_PENDINGOK) != 0)) {
/*
* We increment the reference count on node to ensure that
@@ -3586,7 +3586,7 @@ cache_find(dns_db_t *db, dns_name_t *nam
if (found == NULL ||
(found->trust == dns_trust_glue &&
((options & DNS_DBFIND_GLUEOK) == 0)) ||
- (found->trust == dns_trust_pending &&
+ (DNS_TRUST_PENDING(found->trust) &&
((options & DNS_DBFIND_PENDINGOK) == 0))) {
/*
* If there is an NS rdataset at this node, then this is the
Modified: stable/7/contrib/bind9/lib/dns/resolver.c
==============================================================================
--- stable/7/contrib/bind9/lib/dns/resolver.c Fri Dec 11 02:09:46 2009 (r200392)
+++ stable/7/contrib/bind9/lib/dns/resolver.c Fri Dec 11 02:23:04 2009 (r200393)
@@ -15,7 +15,7 @@
* PERFORMANCE OF THIS SOFTWARE.
*/
-/* $Id: resolver.c,v 1.284.18.79 2008/10/17 22:02:13 jinmei Exp $ */
+/* $Id: resolver.c,v 1.284.18.79.2.1 2009/11/19 00:25:17 marka Exp $ */
/*! \file */
@@ -3887,6 +3887,7 @@ cache_name(fetchctx_t *fctx, dns_name_t
* for it, unless it is glue.
*/
if (secure_domain && rdataset->trust != dns_trust_glue) {
+ dns_trust_t trust;
/*
* RRSIGs are validated as part of validating the
* type they cover.
@@ -3923,12 +3924,34 @@ cache_name(fetchctx_t *fctx, dns_name_t
}
/*
+ * Reject out of bailiwick additional records
+ * without RRSIGs as they can't possibly validate
+ * as "secure" and as we will never never want to
+ * store these as "answers" after validation.
+ */
+ if (rdataset->trust == dns_trust_additional &&
+ sigrdataset == NULL && EXTERNAL(rdataset))
+ continue;
+
+ /*
+ * XXXMPA: If we store as "answer" after validating
+ * then we need to do bailiwick processing and
+ * also need to track whether RRsets are in or
+ * out of bailiwick. This will require a another
+ * pending trust level.
+ *
* Cache this rdataset/sigrdataset pair as
- * pending data.
+ * pending data. Track whether it was additional
+ * or not.
*/
- rdataset->trust = dns_trust_pending;
+ if (rdataset->trust == dns_trust_additional)
+ trust = dns_trust_pending_additional;
+ else
+ trust = dns_trust_pending_answer;
+
+ rdataset->trust = trust;
if (sigrdataset != NULL)
- sigrdataset->trust = dns_trust_pending;
+ sigrdataset->trust = trust;
if (!need_validation)
addedrdataset = ardataset;
else
@@ -4276,7 +4299,7 @@ ncache_message(fetchctx_t *fctx, dns_adb
for (trdataset = ISC_LIST_HEAD(tname->list);
trdataset != NULL;
trdataset = ISC_LIST_NEXT(trdataset, link))
- trdataset->trust = dns_trust_pending;
+ trdataset->trust = dns_trust_pending_answer;
result = dns_message_nextname(fctx->rmessage,
DNS_SECTION_AUTHORITY);
}
Modified: stable/7/contrib/bind9/lib/dns/validator.c
==============================================================================
--- stable/7/contrib/bind9/lib/dns/validator.c Fri Dec 11 02:09:46 2009 (r200392)
+++ stable/7/contrib/bind9/lib/dns/validator.c Fri Dec 11 02:23:04 2009 (r200393)
@@ -15,7 +15,7 @@
* PERFORMANCE OF THIS SOFTWARE.
*/
-/* $Id: validator.c,v 1.119.18.41.2.1 2009/03/17 02:23:49 marka Exp $ */
+/* $Id: validator.c,v 1.119.18.41.2.2 2009/11/19 00:25:18 marka Exp $ */
/*! \file */
@@ -1174,7 +1174,7 @@ get_key(dns_validator_t *val, dns_rdata_
* We have an rrset for the given keyname.
*/
val->keyset = &val->frdataset;
- if (val->frdataset.trust == dns_trust_pending &&
+ if (DNS_TRUST_PENDING(val->frdataset.trust) &&
dns_rdataset_isassociated(&val->fsigrdataset))
{
/*
@@ -1189,7 +1189,7 @@ get_key(dns_validator_t *val, dns_rdata_
if (result != ISC_R_SUCCESS)
return (result);
return (DNS_R_WAIT);
- } else if (val->frdataset.trust == dns_trust_pending) {
+ } else if (DNS_TRUST_PENDING(val->frdataset.trust)) {
/*
* Having a pending key with no signature means that
* something is broken.
@@ -1805,7 +1805,7 @@ validatezonekey(dns_validator_t *val) {
* We have DS records.
*/
val->dsset = &val->frdataset;
- if (val->frdataset.trust == dns_trust_pending &&
+ if (DNS_TRUST_PENDING(val->frdataset.trust) &&
dns_rdataset_isassociated(&val->fsigrdataset))
{
result = create_validator(val,
@@ -1818,7 +1818,7 @@ validatezonekey(dns_validator_t *val) {
if (result != ISC_R_SUCCESS)
return (result);
return (DNS_R_WAIT);
- } else if (val->frdataset.trust == dns_trust_pending) {
+ } else if (DNS_TRUST_PENDING(val->frdataset.trust)) {
/*
* There should never be an unsigned DS.
*/
@@ -2667,7 +2667,7 @@ proveunsecure(dns_validator_t *val, isc_
* There is no DS. If this is a delegation,
* we maybe done.
*/
- if (val->frdataset.trust == dns_trust_pending) {
+ if (DNS_TRUST_PENDING(val->frdataset.trust)) {
result = create_fetch(val, tname,
dns_rdatatype_ds,
dsfetched2,
Modified: stable/7/contrib/bind9/version
==============================================================================
--- stable/7/contrib/bind9/version Fri Dec 11 02:09:46 2009 (r200392)
+++ stable/7/contrib/bind9/version Fri Dec 11 02:23:04 2009 (r200393)
@@ -1,4 +1,4 @@
-# $Id: version,v 1.29.134.23.2.3 2009/07/28 13:57:27 marka Exp $
+# $Id: version,v 1.29.134.23.2.4 2009/11/19 00:25:17 marka Exp $
#
# This file must follow /bin/sh rules. It is imported directly via
# configure.
@@ -7,4 +7,4 @@ MAJORVER=9
MINORVER=4
PATCHVER=3
RELEASETYPE=-P
-RELEASEVER=3
+RELEASEVER=4
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