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Code Issues Releases Wiki Activity

2827. [security] Bogus NXDOMAIN could be cached as if valid. [RT #20712]

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This commit is contained in:
Evan Hunt
2009-12-30 06:46:58 +00:00
parent 3156309a79
commit 9ead684875
3 changed files with 11 additions and 9 deletions
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2
CHANGES
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@@ -1,3 +1,5 @@
2827. [security] Bogus NXDOMAIN could be cached as if valid. [RT #20712]
2826. [bug] NSEC3->NSEC transitions could fail due to a lock not
being released. [RT #20740]

4
lib/dns/include/dns/ncache.h
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@@ -15,7 +15,7 @@
* PERFORMANCE OF THIS SOFTWARE.
*/
/* $Id: ncache.h,v 1.25 2008/09/25 04:02:39 tbox Exp $ */
/* $Id: ncache.h,v 1.26 2009/12/30 06:46:58 each Exp $ */
#ifndef DNS_NCACHE_H
#define DNS_NCACHE_H 1
@@ -76,7 +76,7 @@ dns_ncache_addoptout(dns_message_t *message, dns_db_t *cache,
* The 'covers' argument is the RR type whose nonexistence we are caching,
* or dns_rdatatype_any when caching a NXDOMAIN response.
*
* 'optout' indicates a DNS_RATASETATTR_OPTOUT should be set.
* 'optout' indicates a DNS_RDATASETATTR_OPTOUT should be set.
*
* Note:
*\li If 'addedrdataset' is not NULL, then it will be attached to the added

14
lib/dns/validator.c
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@@ -15,7 +15,7 @@
* PERFORMANCE OF THIS SOFTWARE.
*/
/* $Id: validator.c,v 1.182 2009/11/17 23:55:18 marka Exp $ */
/* $Id: validator.c,v 1.183 2009/12/30 06:46:58 each Exp $ */
#include <config.h>
@@ -3276,20 +3276,20 @@ proveunsecure(dns_validator_t *val, isc_boolean_t have_ds, isc_boolean_t resume)
if (val->havedlvsep)
dns_name_copy(dns_fixedname_name(&val->dlvsep), secroot, NULL);
else {
unsigned int labels;
dns_name_copy(val->event->name, secroot, NULL);
/*
* If this is a response to a DS query, we need to look in
* the parent zone for the trust anchor.
*/
if (val->event->type == dns_rdatatype_ds &&
dns_name_countlabels(secroot) > 1U)
dns_name_split(secroot, 1, NULL, secroot);
labels = dns_name_countlabels(secroot);
if (val->event->type == dns_rdatatype_ds && labels > 1U)
dns_name_getlabelsequence(secroot, 1, labels - 1,
secroot);
result = dns_keytable_finddeepestmatch(val->keytable,
secroot, secroot);
if (result == ISC_R_NOTFOUND) {
validator_log(val, ISC_LOG_DEBUG(3),
"not beneath secure root");
if (val->mustbesecure) {
validator_log(val, ISC_LOG_WARNING,
"must be secure failure, "