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bind: CVE-2016-1285 CVE-2016-1286

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CVE-2016-1285 bind: malformed packet sent to rndc can trigger assertion failure
CVE-2016-1286 bind: malformed signature records for DNAME records can
trigger assertion failure

[YOCTO #9400]

External References:
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2016-1285
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2016-1286
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-1285
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-1286

References to the Upstream commits and Security Advisories:

CVE-2016-1285: https://kb.isc.org/article/AA-01352
https://source.isc.org/cgi-bin/gitweb.cgi?p=bind9.git;a=patch;
h=e7e15d1302b26a96fa0a5307d6f2cb0d8ad4ea63

CVE-2016-1286: https://kb.isc.org/article/AA-01353
https://source.isc.org/cgi-bin/gitweb.cgi?p=bind9.git;a=patch;
h=456e1eadd2a3a2fb9617e60d4db90ef4ba7c6ba3

https://source.isc.org/cgi-bin/gitweb.cgi?p=bind9.git;a=patch;
h=499952eb459c9a41d2092f1d98899c131f9103b2

(From OE-Core rev: e8bc043f871e507542955ad28de74f67afa9bc36)

Signed-off-by: Sona Sarmadi <sona.sarmadi@enea.com>
Signed-off-by: Robert Yang <liezhi.yang@windriver.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
This commit is contained in:
Sona Sarmadi 2016-04-24 18:10:36 -07:00 committed by Richard Purdie
parent ed3115be57
commit 6b9d2edd7d
4 changed files with 538 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

138
meta/recipes-connectivity/bind/bind/CVE-2016-1285.patch Normal file
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@ -0,0 +1,138 @@
From e7e15d1302b26a96fa0a5307d6f2cb0d8ad4ea63 Mon Sep 17 00:00:00 2001
From: Mark Andrews <marka@isc.org>
Date: Thu, 18 Feb 2016 12:11:27 +1100
Subject: [PATCH] 4318. [security] Malformed control messages can
trigger assertions in named and rndc. (CVE-2016-1285) [RT #41666]
(cherry picked from commit a2b15b3305acd52179e6f3dc7d073b07fbc40b8e)
Hand applied Changelog changes.
CVE: CVE-2016-1285
Upstream-Status: Backport
Signed-off-by: Sona Sarmadi <sona.sarmadi@enea.com>
---
diff -ruN a/bin/named/control.c b/bin/named/control.c
--- a/bin/named/control.c 2015-08-15 02:28:49.000000000 +0200
+++ b/bin/named/control.c 2016-04-11 09:38:20.940827528 +0200
@@ -69,7 +69,7 @@
#endif
data = isccc_alist_lookup(message, "_data");
- if (data == NULL) {
+ if (!isccc_alist_alistp(data)) {
/*
* No data section.
*/
diff -ruN a/bin/named/controlconf.c b/bin/named/controlconf.c
--- a/bin/named/controlconf.c 2015-08-15 02:28:49.000000000 +0200
+++ b/bin/named/controlconf.c 2016-04-11 09:38:20.944827355 +0200
@@ -402,7 +402,7 @@
* 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;
}
diff -ruN a/bin/rndc/rndc.c b/bin/rndc/rndc.c
--- a/bin/rndc/rndc.c 2015-08-15 02:28:49.000000000 +0200
+++ b/bin/rndc/rndc.c 2016-04-11 09:38:20.944827355 +0200
@@ -254,8 +254,8 @@
isccc_cc_fromwire(&source, &response, algorithm, &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;
@@ -320,8 +320,8 @@
isccc_cc_fromwire(&source, &response, algorithm, &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;
diff -ruN a/CHANGES b/CHANGES
--- a/CHANGES 2016-04-11 09:36:08.546578759 +0200
+++ b/CHANGES 2016-04-11 09:39:59.356552273 +0200
@@ -1,3 +1,6 @@
+4318. [security] Malformed control messages can trigger assertions
+ in named and rndc. (CVE-2016-1285) [RT #41666]
+
4146. [bug] Address reference leak that could prevent a clean
shutdown. [RT #37125]
diff -ruN a/lib/isccc/cc.c b/lib/isccc/cc.c
--- a/lib/isccc/cc.c 2015-08-15 02:28:49.000000000 +0200
+++ b/lib/isccc/cc.c 2016-04-11 09:38:20.944827355 +0200
@@ -403,13 +403,13 @@
* Extract digest.
*/
_auth = isccc_alist_lookup(alist, "_auth");
- if (_auth == NULL)
+ if (!isccc_alist_alistp(_auth))
return (ISC_R_FAILURE);
if (algorithm == ISCCC_ALG_HMACMD5)
hmac = isccc_alist_lookup(_auth, "hmd5");
else
hmac = isccc_alist_lookup(_auth, "hsha");
- if (hmac == NULL)
+ if (!isccc_sexpr_binaryp(hmac))
return (ISC_R_FAILURE);
/*
* Compute digest.
@@ -728,7 +728,7 @@
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);
@@ -773,7 +773,7 @@
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);
@@ -786,7 +786,7 @@
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);
@@ -806,7 +806,7 @@
_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);
@@ -995,7 +995,7 @@
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);

79
meta/recipes-connectivity/bind/bind/CVE-2016-1286_1.patch Normal file
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@ -0,0 +1,79 @@
From 456e1eadd2a3a2fb9617e60d4db90ef4ba7c6ba3 Mon Sep 17 00:00:00 2001
From: Mukund Sivaraman <muks@isc.org>
Date: Mon, 22 Feb 2016 12:22:43 +0530
Subject: [PATCH] Fix resolver assertion failure due to improper DNAME handling
(CVE-2016-1286) (#41753)
(cherry picked from commit 5995fec51cc8bb7e53804e4936e60aa1537f3673)
Hand applied Changelog changes.
CVE: CVE-2016-1286
Upstream-Status: Backport
Signed-off-by: Sona Sarmadi <sona.sarmadi@enea.com>
---
diff -ruN a/CHANGES b/CHANGES
--- a/CHANGES 2016-04-11 09:46:42.075057394 +0200
+++ b/CHANGES 2016-04-11 09:44:21.857148819 +0200
@@ -1,3 +1,7 @@
+4319. [security] Fix resolver assertion failure due to improper
+ DNAME handling when parsing fetch reply messages.
+ (CVE-2016-1286) [RT #41753]
+
4318. [security] Malformed control messages can trigger assertions
in named and rndc. (CVE-2016-1285) [RT #41666]
diff -ruN a/lib/dns/resolver.c b/lib/dns/resolver.c
--- a/lib/dns/resolver.c 2016-04-11 09:36:08.550578585 +0200
+++ b/lib/dns/resolver.c 2016-04-11 09:43:23.091701714 +0200
@@ -6634,21 +6634,26 @@
isc_boolean_t found_dname = ISC_FALSE;
dns_name_t *dname_name;
+ /*
+ * Only pass DNAME or RRSIG(DNAME).
+ */
+ if (rdataset->type != dns_rdatatype_dname &&
+ (rdataset->type != dns_rdatatype_rrsig ||
+ rdataset->covers != dns_rdatatype_dname))
+ continue;
+
+ /*
+ * If we're not chaining, then the DNAME and
+ * its signature should not be external.
+ */
+ if (!chaining && external) {
+ log_formerr(fctx, "external DNAME");
+ return (DNS_R_FORMERR);
+ }
+
found = ISC_FALSE;
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);
@@ -6677,9 +6682,7 @@
&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.

318
meta/recipes-connectivity/bind/bind/CVE-2016-1286_2.patch Normal file
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@ -0,0 +1,318 @@
From 499952eb459c9a41d2092f1d98899c131f9103b2 Mon Sep 17 00:00:00 2001
From: Mark Andrews <marka@isc.org>
Date: Mon, 29 Feb 2016 07:16:48 +1100
Subject: [PATCH] Part 2 of: 4319.[security] Fix resolver assertion
failure due to improper DNAME handling when parsing fetch reply messages.
(CVE-2016-1286) [RT #41753]
(cherry picked from commit 2de89ee9de8c8da9dc153a754b02dcdbb7fe2374)
CVE: CVE-2016-1286 [part 2]
Upstream-Status: Backport
Signed-off-by: Sona Sarmadi <sona.sarmadi@enea.com>
---
lib/dns/resolver.c | 192 ++++++++++++++++++++++++++---------------------------
1 file changed, 93 insertions(+), 99 deletions(-)
diff --git a/lib/dns/resolver.c b/lib/dns/resolver.c
index 23d636b..fbc0af0 100644
--- a/lib/dns/resolver.c
+++ b/lib/dns/resolver.c
@@ -6088,14 +6088,11 @@ cname_target(dns_rdataset_t *rdataset, dns_name_t *tname) {
}
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;
@@ -6110,21 +6107,6 @@ dname_target(fetchctx_t *fctx, dns_rdataset_t *rdataset, dns_name_t *qname,
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);
@@ -6750,13 +6732,13 @@ static isc_result_t
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, *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");
@@ -6784,10 +6766,15 @@ answer_response(fetchctx_t *fctx) {
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;
@@ -6912,10 +6899,11 @@ answer_response(fetchctx_t *fctx) {
*/
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 =
@@ -6970,6 +6958,8 @@ answer_response(fetchctx_t *fctx) {
if (wanted_chaining)
chaining = ISC_TRUE;
} else {
+ dns_rdataset_t *dnameset = NULL;
+
/*
* Look for a DNAME (or its SIG). Anything else is
* ignored.
@@ -6977,10 +6967,8 @@ answer_response(fetchctx_t *fctx) {
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).
*/
@@ -6994,20 +6982,41 @@ answer_response(fetchctx_t *fctx) {
* its signature should not be external.
*/
if (!chaining && external) {
- log_formerr(fctx, "external DNAME");
+ 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);
}
- found = ISC_FALSE;
aflag = 0;
if (rdataset->type == dns_rdatatype_dname) {
- 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
@@ -7019,14 +7028,12 @@ answer_response(fetchctx_t *fctx) {
} 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 {
@@ -7034,73 +7041,60 @@ answer_response(fetchctx_t *fctx) {
* 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;
}
--
1.9.1

3
meta/recipes-connectivity/bind/bind_9.10.2-P4.bb
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@ -25,6 +25,9 @@ SRC_URI = "ftp://ftp.isc.org/isc/bind9/${PV}/${BPN}-${PV}.tar.gz \
file://CVE-2015-8705.patch \
file://CVE-2015-8000.patch \
file://CVE-2015-8461.patch \
file://CVE-2016-1285.patch \
file://CVE-2016-1286_1.patch \
file://CVE-2016-1286_2.patch \
"
SRC_URI[md5sum] = "8b1f5064837756c938eadc1537dec5c7"