import bind-9.16.23-4.el9
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commit
8dc5c2990f
1144
SOURCES/bind-9.16-CVE-2021-25220-test.patch
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1144
SOURCES/bind-9.16-CVE-2021-25220-test.patch
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File diff suppressed because it is too large
Load Diff
251
SOURCES/bind-9.16-CVE-2021-25220.patch
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251
SOURCES/bind-9.16-CVE-2021-25220.patch
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@ -0,0 +1,251 @@
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From 5b2798e01346cd77741873091babf6c4a3128449 Mon Sep 17 00:00:00 2001
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From: Mark Andrews <marka@isc.org>
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Date: Wed, 19 Jan 2022 17:38:18 +1100
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Subject: [PATCH] Add additional name checks when using a forwarder
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When using a forwarder, check that the owner name of response
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records are within the bailiwick of the forwarded name space.
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(cherry picked from commit 24155213be59faad17f0215ecf73ea49ab781e5b)
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Check that the forward declaration is unchanged and not overridden
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If we are using a fowarder, in addition to checking that names to
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be cached are subdomains of the forwarded namespace, we must also
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check that there are no subsidiary forwarded namespaces which would
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take precedence. To be safe, we don't cache any responses if the
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forwarding configuration has changed since the query was sent.
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(cherry picked from commit 3fc7accd88cd0890f8f57bb13765876774298ba3)
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Check cached names for possible "forward only" clause
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When caching additional and glue data *not* from a forwarder, we must
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check that there is no "forward only" clause covering the owner name
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that would take precedence. Such names would normally be allowed by
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baliwick rules, but a "forward only" zone introduces a new baliwick
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scope.
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(cherry picked from commit ea06552a3d1fed56f7d3a13710e084ec79797b78)
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Look for zones deeper than the current domain or forward name
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When caching glue, we need to ensure that there is no closer
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source of truth for the name. If the owner name for the glue
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record would be answered by a locally configured zone, do not
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cache.
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(cherry picked from commit 71b24210542730355149130770deea3e58d8527a)
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---
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lib/dns/resolver.c | 128 +++++++++++++++++++++++++++++++++++++++++++--
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1 file changed, 123 insertions(+), 5 deletions(-)
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diff --git a/lib/dns/resolver.c b/lib/dns/resolver.c
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index a7bc661bb7..7603a07b7b 100644
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--- a/lib/dns/resolver.c
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+++ b/lib/dns/resolver.c
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@@ -63,6 +63,8 @@
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#include <dns/stats.h>
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#include <dns/tsig.h>
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#include <dns/validator.h>
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+#include <dns/zone.h>
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+
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#ifdef WANT_QUERYTRACE
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#define RTRACE(m) \
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isc_log_write(dns_lctx, DNS_LOGCATEGORY_RESOLVER, \
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@@ -337,6 +339,8 @@ struct fetchctx {
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dns_fetch_t *qminfetch;
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dns_rdataset_t qminrrset;
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dns_name_t qmindcname;
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+ dns_fixedname_t fwdfname;
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+ dns_name_t *fwdname;
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/*%
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* The number of events we're waiting for.
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@@ -3764,6 +3768,7 @@ fctx_getaddresses(fetchctx_t *fctx, bool badcache) {
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if (result == ISC_R_SUCCESS) {
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fwd = ISC_LIST_HEAD(forwarders->fwdrs);
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fctx->fwdpolicy = forwarders->fwdpolicy;
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+ dns_name_copynf(domain, fctx->fwdname);
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if (fctx->fwdpolicy == dns_fwdpolicy_only &&
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isstrictsubdomain(domain, &fctx->domain))
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{
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@@ -5153,6 +5158,9 @@ fctx_create(dns_resolver_t *res, const dns_name_t *name, dns_rdatatype_t type,
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fctx->restarts = 0;
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fctx->querysent = 0;
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fctx->referrals = 0;
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+
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+ fctx->fwdname = dns_fixedname_initname(&fctx->fwdfname);
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+
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TIME_NOW(&fctx->start);
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fctx->timeouts = 0;
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fctx->lamecount = 0;
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@@ -5215,6 +5223,7 @@ fctx_create(dns_resolver_t *res, const dns_name_t *name, dns_rdatatype_t type,
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fname, &forwarders);
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if (result == ISC_R_SUCCESS) {
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fctx->fwdpolicy = forwarders->fwdpolicy;
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+ dns_name_copynf(fname, fctx->fwdname);
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}
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if (fctx->fwdpolicy != dns_fwdpolicy_only) {
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@@ -7118,6 +7127,107 @@ mark_related(dns_name_t *name, dns_rdataset_t *rdataset, bool external,
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}
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}
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+/*
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+ * Returns true if 'name' is external to the namespace for which
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+ * the server being queried can answer, either because it's not a
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+ * subdomain or because it's below a forward declaration or a
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+ * locally served zone.
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+ */
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+static inline bool
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+name_external(const dns_name_t *name, dns_rdatatype_t type, fetchctx_t *fctx) {
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+ isc_result_t result;
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+ dns_forwarders_t *forwarders = NULL;
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+ dns_fixedname_t fixed, zfixed;
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+ dns_name_t *fname = dns_fixedname_initname(&fixed);
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+ dns_name_t *zfname = dns_fixedname_initname(&zfixed);
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+ dns_name_t *apex = NULL;
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+ dns_name_t suffix;
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+ dns_zone_t *zone = NULL;
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+ unsigned int labels;
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+ dns_namereln_t rel;
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+
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+ apex = ISFORWARDER(fctx->addrinfo) ? fctx->fwdname : &fctx->domain;
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+
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+ /*
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+ * The name is outside the queried namespace.
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+ */
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+ rel = dns_name_fullcompare(name, apex, &(int){ 0 },
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+ &(unsigned int){ 0U });
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+ if (rel != dns_namereln_subdomain && rel != dns_namereln_equal) {
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+ return (true);
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+ }
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+
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+ /*
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+ * If the record lives in the parent zone, adjust the name so we
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+ * look for the correct zone or forward clause.
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+ */
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+ labels = dns_name_countlabels(name);
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+ if (dns_rdatatype_atparent(type) && labels > 1U) {
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+ dns_name_init(&suffix, NULL);
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+ dns_name_getlabelsequence(name, 1, labels - 1, &suffix);
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+ name = &suffix;
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+ } else if (rel == dns_namereln_equal) {
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+ /* If 'name' is 'apex', no further checking is needed. */
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+ return (false);
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+ }
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+
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+ /*
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+ * If there is a locally served zone between 'apex' and 'name'
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+ * then don't cache.
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+ */
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+ LOCK(&fctx->res->view->lock);
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+ if (fctx->res->view->zonetable != NULL) {
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+ unsigned int options = DNS_ZTFIND_NOEXACT | DNS_ZTFIND_MIRROR;
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+ result = dns_zt_find(fctx->res->view->zonetable, name, options,
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+ zfname, &zone);
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+ if (zone != NULL) {
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+ dns_zone_detach(&zone);
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+ }
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+ if (result == ISC_R_SUCCESS || result == DNS_R_PARTIALMATCH) {
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+ if (dns_name_fullcompare(zfname, apex, &(int){ 0 },
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+ &(unsigned int){ 0U }) ==
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+ dns_namereln_subdomain)
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+ {
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+ UNLOCK(&fctx->res->view->lock);
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+ return (true);
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+ }
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+ }
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+ }
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+ UNLOCK(&fctx->res->view->lock);
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+
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+ /*
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+ * Look for a forward declaration below 'name'.
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+ */
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+ result = dns_fwdtable_find(fctx->res->view->fwdtable, name, fname,
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+ &forwarders);
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+
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+ if (ISFORWARDER(fctx->addrinfo)) {
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+ /*
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+ * See if the forwarder declaration is better.
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+ */
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+ if (result == ISC_R_SUCCESS) {
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+ return (!dns_name_equal(fname, fctx->fwdname));
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+ }
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+
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+ /*
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+ * If the lookup failed, the configuration must have
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+ * changed: play it safe and don't cache.
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+ */
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+ return (true);
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+ } else if (result == ISC_R_SUCCESS &&
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+ forwarders->fwdpolicy == dns_fwdpolicy_only &&
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+ !ISC_LIST_EMPTY(forwarders->fwdrs))
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+ {
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+ /*
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+ * If 'name' is covered by a 'forward only' clause then we
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+ * can't cache this repsonse.
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+ */
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+ return (true);
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+ }
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+
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+ return (false);
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+}
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+
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static isc_result_t
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check_section(void *arg, const dns_name_t *addname, dns_rdatatype_t type,
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dns_section_t section) {
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@@ -7144,7 +7254,7 @@ check_section(void *arg, const dns_name_t *addname, dns_rdatatype_t type,
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result = dns_message_findname(rctx->query->rmessage, section, addname,
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dns_rdatatype_any, 0, &name, NULL);
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if (result == ISC_R_SUCCESS) {
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- external = !dns_name_issubdomain(name, &fctx->domain);
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+ external = name_external(name, type, fctx);
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if (type == dns_rdatatype_a) {
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for (rdataset = ISC_LIST_HEAD(name->list);
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rdataset != NULL;
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@@ -8768,6 +8878,13 @@ rctx_answer_scan(respctx_t *rctx) {
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break;
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case dns_namereln_subdomain:
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+ /*
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+ * Don't accept DNAME from parent namespace.
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+ */
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+ if (name_external(name, dns_rdatatype_dname, fctx)) {
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+ continue;
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+ }
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+
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/*
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* In-scope DNAME records must have at least
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* as many labels as the domain being queried.
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@@ -9081,13 +9198,11 @@ rctx_authority_positive(respctx_t *rctx) {
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DNS_SECTION_AUTHORITY);
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while (!done && result == ISC_R_SUCCESS) {
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dns_name_t *name = NULL;
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- bool external;
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dns_message_currentname(rctx->query->rmessage,
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DNS_SECTION_AUTHORITY, &name);
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- external = !dns_name_issubdomain(name, &fctx->domain);
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- if (!external) {
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+ if (!name_external(name, dns_rdatatype_ns, fctx)) {
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dns_rdataset_t *rdataset = NULL;
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/*
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@@ -9474,7 +9589,10 @@ rctx_authority_dnssec(respctx_t *rctx) {
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}
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if (!dns_name_issubdomain(name, &fctx->domain)) {
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- /* Invalid name found; preserve it for logging later */
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+ /*
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+ * Invalid name found; preserve it for logging
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+ * later.
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+ */
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rctx->found_name = name;
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rctx->found_type = ISC_LIST_HEAD(name->list)->type;
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continue;
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--
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2.34.1
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81
SOURCES/bind-9.16-CVE-2022-0396.patch
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81
SOURCES/bind-9.16-CVE-2022-0396.patch
Normal file
@ -0,0 +1,81 @@
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From 33064cd077cf6fa386f0a5a840c2161868da7b3a Mon Sep 17 00:00:00 2001
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|
From: =?UTF-8?q?Ond=C5=99ej=20Sur=C3=BD?= <ondrej@isc.org>
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|
Date: Tue, 8 Feb 2022 12:42:34 +0100
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Subject: [PATCH] Run .closehandle_cb asynchrounosly in nmhandle_detach_cb()
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|
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When sock->closehandle_cb is set, we need to run nmhandle_detach_cb()
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|
asynchronously to ensure correct order of multiple packets processing in
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|
the isc__nm_process_sock_buffer(). When not run asynchronously, it
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|
would cause:
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|
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|
a) out-of-order processing of the return codes from processbuffer();
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|
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|
b) stack growth because the next TCP DNS message read callback will
|
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|
be called from within the current TCP DNS message read callback.
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|
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|
The sock->closehandle_cb is set to isc__nm_resume_processing() for TCP
|
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|
sockets which calls isc__nm_process_sock_buffer(). If the read callback
|
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|
(called from isc__nm_process_sock_buffer()->processbuffer()) doesn't
|
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|
attach to the nmhandle (f.e. because it wants to drop the processing or
|
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|
we send the response directly via uv_try_write()), the
|
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|
isc__nm_resume_processing() (via .closehandle_cb) would call
|
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|
isc__nm_process_sock_buffer() recursively.
|
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|
|
||||||
|
The below shortened code path shows how the stack can grow:
|
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|
|
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|
1: ns__client_request(handle, ...);
|
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|
2: isc_nm_tcpdns_sequential(handle);
|
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|
3: ns_query_start(client, handle);
|
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|
4: query_lookup(qctx);
|
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|
5: query_send(qctcx->client);
|
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|
6: isc__nmhandle_detach(&client->reqhandle);
|
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|
7: nmhandle_detach_cb(&handle);
|
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|
8: sock->closehandle_cb(sock); // isc__nm_resume_processing
|
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|
9: isc__nm_process_sock_buffer(sock);
|
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|
10: processbuffer(sock); // isc__nm_tcpdns_processbuffer
|
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|
11: isc_nmhandle_attach(req->handle, &handle);
|
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|
12: isc__nm_readcb(sock, req, ISC_R_SUCCESS);
|
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|
13: isc__nm_async_readcb(NULL, ...);
|
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|
14: uvreq->cb.recv(...); // ns__client_request
|
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|
|
||||||
|
Instead, if 'sock->closehandle_cb' is set, we need to run detach the
|
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|
handle asynchroniously in 'isc__nmhandle_detach', so that on line 8 in
|
||||||
|
the code flow above does not start this recursion. This ensures the
|
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|
correct order when processing multiple packets in the function
|
||||||
|
'isc__nm_process_sock_buffer()' and prevents the stack growth.
|
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|
|
||||||
|
When not run asynchronously, the out-of-order processing leaves the
|
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|
first TCP socket open until all requests on the stream have been
|
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|
processed.
|
||||||
|
|
||||||
|
If the pipelining is disabled on the TCP via `keep-response-order`
|
||||||
|
configuration option, named would keep the first socket in lingering
|
||||||
|
CLOSE_WAIT state when the client sends an incomplete packet and then
|
||||||
|
closes the connection from the client side.
|
||||||
|
|
||||||
|
(cherry picked from commit afee2b5a7bc933a2d987907fc327a9f118fdbd17)
|
||||||
|
---
|
||||||
|
lib/isc/netmgr/netmgr.c | 6 +++++-
|
||||||
|
1 file changed, 5 insertions(+), 1 deletion(-)
|
||||||
|
|
||||||
|
diff --git a/lib/isc/netmgr/netmgr.c b/lib/isc/netmgr/netmgr.c
|
||||||
|
index 3283eb6e4f..0ed3182fb6 100644
|
||||||
|
--- a/lib/isc/netmgr/netmgr.c
|
||||||
|
+++ b/lib/isc/netmgr/netmgr.c
|
||||||
|
@@ -1746,8 +1746,12 @@ isc__nmhandle_detach(isc_nmhandle_t **handlep FLARG) {
|
||||||
|
handle = *handlep;
|
||||||
|
*handlep = NULL;
|
||||||
|
|
||||||
|
+ /*
|
||||||
|
+ * If the closehandle_cb is set, it needs to run asynchronously to
|
||||||
|
+ * ensure correct ordering of the isc__nm_process_sock_buffer().
|
||||||
|
+ */
|
||||||
|
sock = handle->sock;
|
||||||
|
- if (sock->tid == isc_nm_tid()) {
|
||||||
|
+ if (sock->tid == isc_nm_tid() && sock->closehandle_cb == NULL) {
|
||||||
|
nmhandle_detach_cb(&handle FLARG_PASS);
|
||||||
|
} else {
|
||||||
|
isc__netievent_detach_t *event =
|
||||||
|
--
|
||||||
|
2.34.1
|
||||||
|
|
||||||
@ -51,7 +51,7 @@ Summary: The Berkeley Internet Name Domain (BIND) DNS (Domain Name System) serv
|
|||||||
Name: bind
|
Name: bind
|
||||||
License: MPLv2.0
|
License: MPLv2.0
|
||||||
Version: 9.16.23
|
Version: 9.16.23
|
||||||
Release: 1%{?dist}
|
Release: 4%{?dist}
|
||||||
Epoch: 32
|
Epoch: 32
|
||||||
Url: https://www.isc.org/downloads/bind/
|
Url: https://www.isc.org/downloads/bind/
|
||||||
#
|
#
|
||||||
@ -101,6 +101,10 @@ Patch157:bind-9.11-fips-tests.patch
|
|||||||
Patch164:bind-9.11-rh1666814.patch
|
Patch164:bind-9.11-rh1666814.patch
|
||||||
Patch170:bind-9.11-feature-test-named.patch
|
Patch170:bind-9.11-feature-test-named.patch
|
||||||
Patch171:bind-9.11-tests-variants.patch
|
Patch171:bind-9.11-tests-variants.patch
|
||||||
|
# https://gitlab.isc.org/isc-projects/bind9/-/merge_requests/5987
|
||||||
|
Patch172:bind-9.16-CVE-2022-0396.patch
|
||||||
|
Patch173:bind-9.16-CVE-2021-25220.patch
|
||||||
|
Patch174:bind-9.16-CVE-2021-25220-test.patch
|
||||||
|
|
||||||
%{?systemd_ordering}
|
%{?systemd_ordering}
|
||||||
Requires: coreutils
|
Requires: coreutils
|
||||||
@ -401,6 +405,9 @@ in HTML and PDF format.
|
|||||||
%patch164 -p1 -b .rh1666814
|
%patch164 -p1 -b .rh1666814
|
||||||
%patch170 -p1 -b .featuretest-named
|
%patch170 -p1 -b .featuretest-named
|
||||||
%patch171 -p1 -b .test-variant
|
%patch171 -p1 -b .test-variant
|
||||||
|
%patch172 -p1 -b .CVE-2022-0396
|
||||||
|
%patch173 -p1 -b .CVE-2021-25220
|
||||||
|
%patch174 -p1 -b .CVE-2021-25220-test
|
||||||
|
|
||||||
%if %{with PKCS11}
|
%if %{with PKCS11}
|
||||||
%patch135 -p1 -b .config-pkcs11
|
%patch135 -p1 -b .config-pkcs11
|
||||||
@ -1123,6 +1130,17 @@ fi;
|
|||||||
%endif
|
%endif
|
||||||
|
|
||||||
%changelog
|
%changelog
|
||||||
|
* Thu Jul 14 2022 Petr Menšík <pemensik@redhat.com> - 32:9.16.23-4
|
||||||
|
- Export bind-doc package (#2104863)
|
||||||
|
|
||||||
|
* Mon Apr 11 2022 Petr Menšík <pemensik@redhat.com> - 32:9.16.23-3
|
||||||
|
- Tighten cache protection against record from forwarders (CVE-2021-25220)
|
||||||
|
- Include test of forwarders
|
||||||
|
|
||||||
|
* Fri Mar 25 2022 Petr Menšík <pemensik@redhat.com> - 32:9.16.23-2
|
||||||
|
- TCP connections with 'keep-response-order' are properly close in all cases
|
||||||
|
(CVE-2022-0396)
|
||||||
|
|
||||||
* Fri Nov 19 2021 Petr Menšík <pemensik@redhat.com> - 32:9.16.23-1
|
* Fri Nov 19 2021 Petr Menšík <pemensik@redhat.com> - 32:9.16.23-1
|
||||||
- Update to 9.16.23 (#2024210)
|
- Update to 9.16.23 (#2024210)
|
||||||
|
|
||||||
|
|||||||
Loading…
Reference in New Issue
Block a user