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doc/share/security/patches/SA-16:13/bind.patch
Xin LI 2e3c7704e0 Add SA-16:12 and SA-16:13.
2016-03-10 10:18:18 +00:00

428 lines
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--- contrib/bind9/bin/named/control.c.orig
+++ contrib/bind9/bin/named/control.c
@@ -69,7 +69,7 @@
#endif
data = isccc_alist_lookup(message, "_data");
- if (data == NULL) {
+ if (!isccc_alist_alistp(data)) {
/*
* No data section.
*/
--- contrib/bind9/bin/named/controlconf.c.orig
+++ contrib/bind9/bin/named/controlconf.c
@@ -1,5 +1,5 @@
/*
- * Copyright (C) 2004-2008, 2011-2014 Internet Systems Consortium, Inc. ("ISC")
+ * Copyright (C) 2004-2008, 2011-2014, 2016 Internet Systems Consortium, Inc. ("ISC")
* Copyright (C) 2001-2003 Internet Software Consortium.
*
* Permission to use, copy, modify, and/or distribute this software for any
@@ -396,7 +396,7 @@
* Limit exposure to replay attacks.
*/
_ctrl = isccc_alist_lookup(request, "_ctrl");
- if (_ctrl == NULL) {
+ if (!isccc_alist_alistp(_ctrl)) {
log_invalid(&conn->ccmsg, ISC_R_FAILURE);
goto cleanup_request;
}
--- contrib/bind9/bin/rndc/rndc.c.orig
+++ contrib/bind9/bin/rndc/rndc.c
@@ -252,8 +252,8 @@
DO("parse message", isccc_cc_fromwire(&source, &response, &secret));
data = isccc_alist_lookup(response, "_data");
- if (data == NULL)
- fatal("no data section in response");
+ if (!isccc_alist_alistp(data))
+ fatal("bad or missing data section in response");
result = isccc_cc_lookupstring(data, "err", &errormsg);
if (result == ISC_R_SUCCESS) {
failed = ISC_TRUE;
@@ -316,8 +316,8 @@
DO("parse message", isccc_cc_fromwire(&source, &response, &secret));
_ctrl = isccc_alist_lookup(response, "_ctrl");
- if (_ctrl == NULL)
- fatal("_ctrl section missing");
+ if (!isccc_alist_alistp(_ctrl))
+ fatal("bad or missing ctrl section in response");
nonce = 0;
if (isccc_cc_lookupuint32(_ctrl, "_nonce", &nonce) != ISC_R_SUCCESS)
nonce = 0;
--- contrib/bind9/lib/dns/resolver.c.orig
+++ contrib/bind9/lib/dns/resolver.c
@@ -5385,14 +5385,11 @@
}
static inline isc_result_t
-dname_target(fetchctx_t *fctx, dns_rdataset_t *rdataset, dns_name_t *qname,
- dns_name_t *oname, dns_fixedname_t *fixeddname)
+dname_target(dns_rdataset_t *rdataset, dns_name_t *qname,
+ unsigned int nlabels, dns_fixedname_t *fixeddname)
{
isc_result_t result;
dns_rdata_t rdata = DNS_RDATA_INIT;
- unsigned int nlabels;
- int order;
- dns_namereln_t namereln;
dns_rdata_dname_t dname;
dns_fixedname_t prefix;
@@ -5407,21 +5404,6 @@
if (result != ISC_R_SUCCESS)
return (result);
- /*
- * Get the prefix of qname.
- */
- namereln = dns_name_fullcompare(qname, oname, &order, &nlabels);
- if (namereln != dns_namereln_subdomain) {
- char qbuf[DNS_NAME_FORMATSIZE];
- char obuf[DNS_NAME_FORMATSIZE];
-
- dns_rdata_freestruct(&dname);
- dns_name_format(qname, qbuf, sizeof(qbuf));
- dns_name_format(oname, obuf, sizeof(obuf));
- log_formerr(fctx, "unrelated DNAME in answer: "
- "%s is not in %s", qbuf, obuf);
- return (DNS_R_FORMERR);
- }
dns_fixedname_init(&prefix);
dns_name_split(qname, nlabels, dns_fixedname_name(&prefix), NULL);
dns_fixedname_init(fixeddname);
@@ -6034,13 +6016,13 @@
answer_response(fetchctx_t *fctx) {
isc_result_t result;
dns_message_t *message;
- dns_name_t *name, *qname, tname, *ns_name;
+ dns_name_t *name, *dname = NULL, *qname, tname, *ns_name;
dns_rdataset_t *rdataset, *ns_rdataset;
isc_boolean_t done, external, chaining, aa, found, want_chaining;
isc_boolean_t have_answer, found_cname, found_type, wanted_chaining;
unsigned int aflag;
dns_rdatatype_t type;
- dns_fixedname_t dname, fqname;
+ dns_fixedname_t fdname, fqname;
dns_view_t *view;
FCTXTRACE("answer_response");
@@ -6068,10 +6050,15 @@
view = fctx->res->view;
result = dns_message_firstname(message, DNS_SECTION_ANSWER);
while (!done && result == ISC_R_SUCCESS) {
+ dns_namereln_t namereln;
+ int order;
+ unsigned int nlabels;
+
name = NULL;
dns_message_currentname(message, DNS_SECTION_ANSWER, &name);
external = ISC_TF(!dns_name_issubdomain(name, &fctx->domain));
- if (dns_name_equal(name, qname)) {
+ namereln = dns_name_fullcompare(qname, name, &order, &nlabels);
+ if (namereln == dns_namereln_equal) {
wanted_chaining = ISC_FALSE;
for (rdataset = ISC_LIST_HEAD(name->list);
rdataset != NULL;
@@ -6196,10 +6183,11 @@
*/
INSIST(!external);
if (aflag ==
- DNS_RDATASETATTR_ANSWER)
+ DNS_RDATASETATTR_ANSWER) {
have_answer = ISC_TRUE;
- name->attributes |=
- DNS_NAMEATTR_ANSWER;
+ name->attributes |=
+ DNS_NAMEATTR_ANSWER;
+ }
rdataset->attributes |= aflag;
if (aa)
rdataset->trust =
@@ -6254,6 +6242,8 @@
if (wanted_chaining)
chaining = ISC_TRUE;
} else {
+ dns_rdataset_t *dnameset = NULL;
+
/*
* Look for a DNAME (or its SIG). Anything else is
* ignored.
@@ -6261,32 +6251,56 @@
wanted_chaining = ISC_FALSE;
for (rdataset = ISC_LIST_HEAD(name->list);
rdataset != NULL;
- rdataset = ISC_LIST_NEXT(rdataset, link)) {
- isc_boolean_t found_dname = ISC_FALSE;
- dns_name_t *dname_name;
+ rdataset = ISC_LIST_NEXT(rdataset, link))
+ {
+ /*
+ * Only pass DNAME or RRSIG(DNAME).
+ */
+ if (rdataset->type != dns_rdatatype_dname &&
+ (rdataset->type != dns_rdatatype_rrsig ||
+ rdataset->covers != dns_rdatatype_dname))
+ continue;
- found = ISC_FALSE;
+ /*
+ * If we're not chaining, then the DNAME and
+ * its signature should not be external.
+ */
+ if (!chaining && external) {
+ char qbuf[DNS_NAME_FORMATSIZE];
+ char obuf[DNS_NAME_FORMATSIZE];
+
+ dns_name_format(name, qbuf,
+ sizeof(qbuf));
+ dns_name_format(&fctx->domain, obuf,
+ sizeof(obuf));
+ log_formerr(fctx, "external DNAME or "
+ "RRSIG covering DNAME "
+ "in answer: %s is "
+ "not in %s", qbuf, obuf);
+ return (DNS_R_FORMERR);
+ }
+
+ if (namereln != dns_namereln_subdomain) {
+ char qbuf[DNS_NAME_FORMATSIZE];
+ char obuf[DNS_NAME_FORMATSIZE];
+
+ dns_name_format(qname, qbuf,
+ sizeof(qbuf));
+ dns_name_format(name, obuf,
+ sizeof(obuf));
+ log_formerr(fctx, "unrelated DNAME "
+ "in answer: %s is "
+ "not in %s", qbuf, obuf);
+ return (DNS_R_FORMERR);
+ }
+
aflag = 0;
if (rdataset->type == dns_rdatatype_dname) {
- /*
- * We're looking for something else,
- * but we found a DNAME.
- *
- * If we're not chaining, then the
- * DNAME should not be external.
- */
- if (!chaining && external) {
- log_formerr(fctx,
- "external DNAME");
- return (DNS_R_FORMERR);
- }
- found = ISC_TRUE;
want_chaining = ISC_TRUE;
POST(want_chaining);
aflag = DNS_RDATASETATTR_ANSWER;
- result = dname_target(fctx, rdataset,
- qname, name,
- &dname);
+ result = dname_target(rdataset, qname,
+ nlabels, &fdname);
if (result == ISC_R_NOSPACE) {
/*
* We can't construct the
@@ -6298,90 +6312,73 @@
} else if (result != ISC_R_SUCCESS)
return (result);
else
- found_dname = ISC_TRUE;
+ dnameset = rdataset;
- dname_name = dns_fixedname_name(&dname);
+ dname = dns_fixedname_name(&fdname);
if (!is_answertarget_allowed(view,
- qname,
- rdataset->type,
- dname_name,
- &fctx->domain)) {
+ qname, rdataset->type,
+ dname, &fctx->domain)) {
return (DNS_R_SERVFAIL);
}
- } else if (rdataset->type == dns_rdatatype_rrsig
- && rdataset->covers ==
- dns_rdatatype_dname) {
+ } else {
/*
* We've found a signature that
* covers the DNAME.
*/
- found = ISC_TRUE;
aflag = DNS_RDATASETATTR_ANSWERSIG;
}
- if (found) {
+ /*
+ * We've found an answer to our
+ * question.
+ */
+ name->attributes |= DNS_NAMEATTR_CACHE;
+ rdataset->attributes |= DNS_RDATASETATTR_CACHE;
+ rdataset->trust = dns_trust_answer;
+ if (!chaining) {
/*
- * We've found an answer to our
- * question.
+ * This data is "the" answer to
+ * our question only if we're
+ * not chaining.
*/
- name->attributes |=
- DNS_NAMEATTR_CACHE;
- rdataset->attributes |=
- DNS_RDATASETATTR_CACHE;
- rdataset->trust = dns_trust_answer;
- if (!chaining) {
- /*
- * This data is "the" answer
- * to our question only if
- * we're not chaining.
- */
- INSIST(!external);
- if (aflag ==
- DNS_RDATASETATTR_ANSWER)
- have_answer = ISC_TRUE;
+ INSIST(!external);
+ if (aflag == DNS_RDATASETATTR_ANSWER) {
+ have_answer = ISC_TRUE;
name->attributes |=
DNS_NAMEATTR_ANSWER;
- rdataset->attributes |= aflag;
- if (aa)
- rdataset->trust =
- dns_trust_authanswer;
- } else if (external) {
- rdataset->attributes |=
- DNS_RDATASETATTR_EXTERNAL;
}
-
- /*
- * DNAME chaining.
- */
- if (found_dname) {
- /*
- * Copy the dname into the
- * qname fixed name.
- *
- * Although we check for
- * failure of the copy
- * operation, in practice it
- * should never fail since
- * we already know that the
- * result fits in a fixedname.
- */
- dns_fixedname_init(&fqname);
- result = dns_name_copy(
- dns_fixedname_name(&dname),
- dns_fixedname_name(&fqname),
- NULL);
- if (result != ISC_R_SUCCESS)
- return (result);
- wanted_chaining = ISC_TRUE;
- name->attributes |=
- DNS_NAMEATTR_CHAINING;
- rdataset->attributes |=
- DNS_RDATASETATTR_CHAINING;
- qname = dns_fixedname_name(
- &fqname);
- }
+ rdataset->attributes |= aflag;
+ if (aa)
+ rdataset->trust =
+ dns_trust_authanswer;
+ } else if (external) {
+ rdataset->attributes |=
+ DNS_RDATASETATTR_EXTERNAL;
}
}
+
+ /*
+ * DNAME chaining.
+ */
+ if (dnameset != NULL) {
+ /*
+ * Copy the dname into the qname fixed name.
+ *
+ * Although we check for failure of the copy
+ * operation, in practice it should never fail
+ * since we already know that the result fits
+ * in a fixedname.
+ */
+ dns_fixedname_init(&fqname);
+ qname = dns_fixedname_name(&fqname);
+ result = dns_name_copy(dname, qname, NULL);
+ if (result != ISC_R_SUCCESS)
+ return (result);
+ wanted_chaining = ISC_TRUE;
+ name->attributes |= DNS_NAMEATTR_CHAINING;
+ dnameset->attributes |=
+ DNS_RDATASETATTR_CHAINING;
+ }
if (wanted_chaining)
chaining = ISC_TRUE;
}
--- contrib/bind9/lib/isccc/cc.c.orig
+++ contrib/bind9/lib/isccc/cc.c
@@ -287,10 +287,10 @@
* Extract digest.
*/
_auth = isccc_alist_lookup(alist, "_auth");
- if (_auth == NULL)
+ if (!isccc_alist_alistp(_auth))
return (ISC_R_FAILURE);
hmd5 = isccc_alist_lookup(_auth, "hmd5");
- if (hmd5 == NULL)
+ if (!isccc_sexpr_binaryp(hmd5))
return (ISC_R_FAILURE);
/*
* Compute digest.
@@ -545,7 +545,7 @@
REQUIRE(ackp != NULL && *ackp == NULL);
_ctrl = isccc_alist_lookup(message, "_ctrl");
- if (_ctrl == NULL ||
+ if (!isccc_alist_alistp(_ctrl) ||
isccc_cc_lookupuint32(_ctrl, "_ser", &serial) != ISC_R_SUCCESS ||
isccc_cc_lookupuint32(_ctrl, "_tim", &t) != ISC_R_SUCCESS)
return (ISC_R_FAILURE);
@@ -590,7 +590,7 @@
isccc_sexpr_t *_ctrl;
_ctrl = isccc_alist_lookup(message, "_ctrl");
- if (_ctrl == NULL)
+ if (!isccc_alist_alistp(_ctrl))
return (ISC_FALSE);
if (isccc_cc_lookupstring(_ctrl, "_ack", NULL) == ISC_R_SUCCESS)
return (ISC_TRUE);
@@ -603,7 +603,7 @@
isccc_sexpr_t *_ctrl;
_ctrl = isccc_alist_lookup(message, "_ctrl");
- if (_ctrl == NULL)
+ if (!isccc_alist_alistp(_ctrl))
return (ISC_FALSE);
if (isccc_cc_lookupstring(_ctrl, "_rpl", NULL) == ISC_R_SUCCESS)
return (ISC_TRUE);
@@ -623,7 +623,7 @@
_ctrl = isccc_alist_lookup(message, "_ctrl");
_data = isccc_alist_lookup(message, "_data");
- if (_ctrl == NULL || _data == NULL ||
+ if (!isccc_alist_alistp(_ctrl) || !isccc_alist_alistp(_data) ||
isccc_cc_lookupuint32(_ctrl, "_ser", &serial) != ISC_R_SUCCESS ||
isccc_cc_lookupstring(_data, "type", &type) != ISC_R_SUCCESS)
return (ISC_R_FAILURE);
@@ -812,7 +812,7 @@
isccc_sexpr_t *_ctrl;
_ctrl = isccc_alist_lookup(message, "_ctrl");
- if (_ctrl == NULL ||
+ if (!isccc_alist_alistp(_ctrl) ||
isccc_cc_lookupstring(_ctrl, "_ser", &_ser) != ISC_R_SUCCESS ||
isccc_cc_lookupstring(_ctrl, "_tim", &_tim) != ISC_R_SUCCESS)
return (ISC_R_FAILURE);
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