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authorArmin Kuster <akuster@mvista.com>2016-09-17 14:22:15 -0700
committerRichard Purdie <richard.purdie@linuxfoundation.org>2016-09-23 23:22:03 +0100
commit9657825ef32ab0c864b1d9de92325b661da046b0 (patch)
tree4339c197657203c23163fb12c565e5a2b08ea3eb /meta
parent9f1dc20619dd4e96368d67190009d548d8b8ffab (diff)
downloadpoky-9657825ef32ab0c864b1d9de92325b661da046b0.tar.gz
bind: Security fix CVE-2016-2088
(From OE-Core rev: 91e05c25eb221ff1dc2bde5cfaa0bea88345b1e4) Signed-off-by: Armin Kuster <akuster@mvista.com> Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
Diffstat (limited to 'meta')
-rw-r--r--meta/recipes-connectivity/bind/bind/CVE-2016-2088.patch216
-rw-r--r--meta/recipes-connectivity/bind/bind_9.10.2-P4.bb1
2 files changed, 217 insertions, 0 deletions
diff --git a/meta/recipes-connectivity/bind/bind/CVE-2016-2088.patch b/meta/recipes-connectivity/bind/bind/CVE-2016-2088.patch
new file mode 100644
index 0000000000..f3f2cc82d2
--- /dev/null
+++ b/meta/recipes-connectivity/bind/bind/CVE-2016-2088.patch
@@ -0,0 +1,216 @@
1From d7ff9a1c41bf0ba9773cb3adb08b48b9fd57c956 Mon Sep 17 00:00:00 2001
2From: Mark Andrews <marka@isc.org>
3Date: Sat, 27 Feb 2016 11:23:50 +1100
4Subject: [PATCH] 4322. [security] Duplicate EDNS COOKIE options in a
5 response could trigger an assertion failure.
6 (CVE-2016-2088) [RT #41809]
7
8(cherry picked from commit 455c0848f80a8acda27aad1466c72987cafaa029)
9(cherry picked from commit 7cd300abd6ee8b8ee8730593daf742ba53f90bc3)
10
11Upstream-Status: Backport
12CVE: CVE-2016-2088
13minor fixup to get to apply.
14
15Signed-off-by: Armin Kuster <akuster@mvista.com>
16
17---
18 CHANGES | 5 +++++
19 bin/dig/dighost.c | 9 +++++++++
20 bin/named/client.c | 33 +++++++++++++++++++++++----------
21 doc/arm/notes.xml | 7 +++++++
22 lib/dns/resolver.c | 14 +++++++++++++-
23 5 files changed, 57 insertions(+), 11 deletions(-)
24
25Index: bind-9.10.2-P4/CHANGES
26===================================================================
27--- bind-9.10.2-P4.orig/CHANGES
28+++ bind-9.10.2-P4/CHANGES
29@@ -1,3 +1,7 @@
30+4322. [security] Duplicate EDNS COOKIE options in a response could
31+ trigger an assertion failure. (CVE-2016-2088)
32+ [RT #41809]
33+
34 4319. [security] Fix resolver assertion failure due to improper
35 DNAME handling when parsing fetch reply messages.
36 (CVE-2016-1286) [RT #41753]
37Index: bind-9.10.2-P4/bin/dig/dighost.c
38===================================================================
39--- bind-9.10.2-P4.orig/bin/dig/dighost.c
40+++ bind-9.10.2-P4/bin/dig/dighost.c
41@@ -3349,6 +3349,7 @@ process_opt(dig_lookup_t *l, dns_message
42 isc_buffer_t optbuf;
43 isc_uint16_t optcode, optlen;
44 dns_rdataset_t *opt = msg->opt;
45+ isc_boolean_t seen_cookie = ISC_FALSE;
46
47 result = dns_rdataset_first(opt);
48 if (result == ISC_R_SUCCESS) {
49@@ -3360,8 +3361,16 @@ process_opt(dig_lookup_t *l, dns_message
50 optcode = isc_buffer_getuint16(&optbuf);
51 optlen = isc_buffer_getuint16(&optbuf);
52 switch (optcode) {
53- case DNS_OPT_SIT:
54+ case DNS_OPT_SIT:
55+ /*
56+ * Only process the first cookie option.
57+ */
58+ if (seen_cookie) {
59+ isc_buffer_forward(&optbuf, optlen);
60+ break;
61+ }
62 process_sit(l, msg, &optbuf, optlen);
63+ seen_cookie = ISC_TRUE;
64 break;
65 default:
66 isc_buffer_forward(&optbuf, optlen);
67Index: bind-9.10.2-P4/bin/named/client.c
68===================================================================
69--- bind-9.10.2-P4.orig/bin/named/client.c
70+++ bind-9.10.2-P4/bin/named/client.c
71@@ -121,7 +121,10 @@
72 */
73 #endif
74
75-#define SIT_SIZE 24U /* 8 + 4 + 4 + 8 */
76+#define COOKIE_SIZE 24U /* 8 + 4 + 4 + 8 */
77+
78+#define WANTNSID(x) (((x)->attributes & NS_CLIENTATTR_WANTNSID) != 0)
79+#define WANTEXPIRE(x) (((x)->attributes & NS_CLIENTATTR_WANTEXPIRE) != 0)
80
81 /*% nameserver client manager structure */
82 struct ns_clientmgr {
83@@ -1391,7 +1394,7 @@ ns_client_addopt(ns_client_t *client, dn
84 {
85 char nsid[BUFSIZ], *nsidp;
86 #ifdef ISC_PLATFORM_USESIT
87- unsigned char sit[SIT_SIZE];
88+ unsigned char sit[COOKIE_SIZE];
89 #endif
90 isc_result_t result;
91 dns_view_t *view;
92@@ -1416,7 +1419,7 @@ ns_client_addopt(ns_client_t *client, dn
93 flags = client->extflags & DNS_MESSAGEEXTFLAG_REPLYPRESERVE;
94
95 /* Set EDNS options if applicable */
96- if ((client->attributes & NS_CLIENTATTR_WANTNSID) != 0 &&
97+ if (WANTNSID(client) &&
98 (ns_g_server->server_id != NULL ||
99 ns_g_server->server_usehostname)) {
100 if (ns_g_server->server_usehostname) {
101@@ -1449,7 +1452,7 @@ ns_client_addopt(ns_client_t *client, dn
102
103 INSIST(count < DNS_EDNSOPTIONS);
104 ednsopts[count].code = DNS_OPT_SIT;
105- ednsopts[count].length = SIT_SIZE;
106+ ednsopts[count].length = COOKIE_SIZE;
107 ednsopts[count].value = sit;
108 count++;
109 }
110@@ -1657,19 +1660,26 @@ compute_sit(ns_client_t *client, isc_uin
111
112 static void
113 process_sit(ns_client_t *client, isc_buffer_t *buf, size_t optlen) {
114- unsigned char dbuf[SIT_SIZE];
115+ unsigned char dbuf[COOKIE_SIZE];
116 unsigned char *old;
117 isc_stdtime_t now;
118 isc_uint32_t when;
119 isc_uint32_t nonce;
120 isc_buffer_t db;
121
122+ /*
123+ * If we have already seen a ECS option skip this ECS option.
124+ */
125+ if ((client->attributes & NS_CLIENTATTR_WANTSIT) != 0) {
126+ isc_buffer_forward(buf, optlen);
127+ return;
128+ }
129 client->attributes |= NS_CLIENTATTR_WANTSIT;
130
131 isc_stats_increment(ns_g_server->nsstats,
132 dns_nsstatscounter_sitopt);
133
134- if (optlen != SIT_SIZE) {
135+ if (optlen != COOKIE_SIZE) {
136 /*
137 * Not our token.
138 */
139@@ -1713,7 +1723,7 @@ process_sit(ns_client_t *client, isc_buf
140 isc_buffer_init(&db, dbuf, sizeof(dbuf));
141 compute_sit(client, when, nonce, &db);
142
143- if (memcmp(old, dbuf, SIT_SIZE) != 0) {
144+ if (memcmp(old, dbuf, COOKIE_SIZE) != 0) {
145 isc_stats_increment(ns_g_server->nsstats,
146 dns_nsstatscounter_sitnomatch);
147 return;
148@@ -1779,7 +1789,9 @@ process_opt(ns_client_t *client, dns_rda
149 optlen = isc_buffer_getuint16(&optbuf);
150 switch (optcode) {
151 case DNS_OPT_NSID:
152- isc_stats_increment(ns_g_server->nsstats,
153+ if (!WANTNSID(client))
154+ isc_stats_increment(
155+ ns_g_server->nsstats,
156 dns_nsstatscounter_nsidopt);
157 client->attributes |= NS_CLIENTATTR_WANTNSID;
158 isc_buffer_forward(&optbuf, optlen);
159@@ -1790,7 +1802,9 @@ process_opt(ns_client_t *client, dns_rda
160 break;
161 #endif
162 case DNS_OPT_EXPIRE:
163- isc_stats_increment(ns_g_server->nsstats,
164+ if (!WANTEXPIRE(client))
165+ isc_stats_increment(
166+ ns_g_server->nsstats,
167 dns_nsstatscounter_expireopt);
168 client->attributes |= NS_CLIENTATTR_WANTEXPIRE;
169 isc_buffer_forward(&optbuf, optlen);
170Index: bind-9.10.2-P4/lib/dns/resolver.c
171===================================================================
172--- bind-9.10.2-P4.orig/lib/dns/resolver.c
173+++ bind-9.10.2-P4/lib/dns/resolver.c
174@@ -7144,7 +7144,9 @@ process_opt(resquery_t *query, dns_rdata
175 unsigned char *sit;
176 dns_adbaddrinfo_t *addrinfo;
177 unsigned char cookie[8];
178+ isc_boolean_t seen_cookie = ISC_FALSE;
179 #endif
180+ isc_boolean_t seen_nsid = ISC_FALSE;
181
182 result = dns_rdataset_first(opt);
183 if (result == ISC_R_SUCCESS) {
184@@ -7158,14 +7160,23 @@ process_opt(resquery_t *query, dns_rdata
185 INSIST(optlen <= isc_buffer_remaininglength(&optbuf));
186 switch (optcode) {
187 case DNS_OPT_NSID:
188- if (query->options & DNS_FETCHOPT_WANTNSID)
189+ if (!seen_nsid &&
190+ query->options & DNS_FETCHOPT_WANTNSID)
191 log_nsid(&optbuf, optlen, query,
192 ISC_LOG_DEBUG(3),
193 query->fctx->res->mctx);
194 isc_buffer_forward(&optbuf, optlen);
195+ seen_nsid = ISC_TRUE;
196 break;
197 #ifdef ISC_PLATFORM_USESIT
198 case DNS_OPT_SIT:
199+ /*
200+ * Only process the first cookie option.
201+ */
202+ if (seen_cookie) {
203+ isc_buffer_forward(&optbuf, optlen);
204+ break;
205+ }
206 sit = isc_buffer_current(&optbuf);
207 compute_cc(query, cookie, sizeof(cookie));
208 INSIST(query->fctx->rmessage->sitbad == 0 &&
209@@ -7183,6 +7194,7 @@ process_opt(resquery_t *query, dns_rdata
210 isc_buffer_forward(&optbuf, optlen);
211 inc_stats(query->fctx->res,
212 dns_resstatscounter_sitin);
213+ seen_cookie = ISC_TRUE;
214 break;
215 #endif
216 default:
diff --git a/meta/recipes-connectivity/bind/bind_9.10.2-P4.bb b/meta/recipes-connectivity/bind/bind_9.10.2-P4.bb
index f1951a0a57..0dfa314f7a 100644
--- a/meta/recipes-connectivity/bind/bind_9.10.2-P4.bb
+++ b/meta/recipes-connectivity/bind/bind_9.10.2-P4.bb
@@ -28,6 +28,7 @@ SRC_URI = "ftp://ftp.isc.org/isc/bind9/${PV}/${BPN}-${PV}.tar.gz \
28 file://CVE-2016-1285.patch \ 28 file://CVE-2016-1285.patch \
29 file://CVE-2016-1286_1.patch \ 29 file://CVE-2016-1286_1.patch \
30 file://CVE-2016-1286_2.patch \ 30 file://CVE-2016-1286_2.patch \
31 file://CVE-2016-2088.patch \
31 " 32 "
32 33
33SRC_URI[md5sum] = "8b1f5064837756c938eadc1537dec5c7" 34SRC_URI[md5sum] = "8b1f5064837756c938eadc1537dec5c7"
generated by cgit v1.2.3-54-g00ecf (git 2.39.0) at 2024-11-10 19:40:31 +0000