bind: Security fix CVE-2016-2775

affect bind < 9.10.4-p2

(From OE-Core rev: 54bf7379036eec6d6c4399aa374f898ba3464996)

Signed-off-by: Armin Kuster <akuster808@gmail.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

2 files changed, 85 insertions, 0 deletions

diff --git a/meta/recipes-connectivity/bind/bind/CVE-2016-2775.patch b/meta/recipes-connectivity/bind/bind/CVE-2016-2775.patch
new file mode 100644
index 0000000000..5d4d9126bf
--- /dev/null
+++ b/meta/recipes-connectivity/bind/bind/CVE-2016-2775.patch
@@ -0,0 +1,84 @@
+From 390c5183af79861fcf07a44014912788744e85de Mon Sep 17 00:00:00 2001
+From: Mark Andrews <marka@isc.org>
+Date: Thu, 7 Jul 2016 12:52:47 +1000
+Subject: [PATCH] 4406.   [bug]           getrrsetbyname with a non absolute
+ name could                         trigger a infinite recursion bug in lwresd
+                         and named with lwres configured if when combined     
+                    with a search list entry the resulting name is            
+             too long. [RT #42694]
+
+(cherry picked from commit 38cc2d14e218e536e0102fa70deef99461354232)
+
+Upstream-Status: Backport
+CVE: CVE-2016-2775
+
+Signed-off-by: Armin Kuster <akuster@mvista.com>
+
+---
+ CHANGES                          |  6 ++++++
+ bin/named/lwdgrbn.c              | 16 ++++++++++------
+ bin/tests/system/lwresd/lwtest.c |  8 ++++++++
+ 3 files changed, 24 insertions(+), 6 deletions(-)
+
+Index: bind-9.10.2-P4/bin/named/lwdgrbn.c
+===================================================================
+--- bind-9.10.2-P4.orig/bin/named/lwdgrbn.c
++++ bind-9.10.2-P4/bin/named/lwdgrbn.c
+@@ -403,14 +403,18 @@ start_lookup(ns_lwdclient_t *client) {
+        INSIST(client->lookup == NULL);
+ 
+        dns_fixedname_init(&absname);
+-       result = ns_lwsearchctx_current(&client->searchctx,
+-                                       dns_fixedname_name(&absname));
++
+        /*
+-        * This will return failure if relative name + suffix is too long.
+-        * In this case, just go on to the next entry in the search path.
++        * Perform search across all search domains until success
++        * is returned. Return in case of failure.
+         */
+-       if (result != ISC_R_SUCCESS)
+-               start_lookup(client);
++       while (ns_lwsearchctx_current(&client->searchctx,
++                       dns_fixedname_name(&absname)) != ISC_R_SUCCESS) {
++               if (ns_lwsearchctx_next(&client->searchctx) != ISC_R_SUCCESS) {
++                       ns_lwdclient_errorpktsend(client, LWRES_R_FAILURE);
++                       return;
++               }
++       }
+ 
+        result = dns_lookup_create(cm->mctx,
+                                   dns_fixedname_name(&absname),
+Index: bind-9.10.2-P4/bin/tests/system/lwresd/lwtest.c
+===================================================================
+--- bind-9.10.2-P4.orig/bin/tests/system/lwresd/lwtest.c
++++ bind-9.10.2-P4/bin/tests/system/lwresd/lwtest.c
+@@ -768,6 +768,14 @@ main(void) {
+        test_getrrsetbyname("e.example1.", 1, 46, 2, 0, 1);
+        test_getrrsetbyname("", 1, 1, 0, 0, 0);
+ 
++       test_getrrsetbyname("123456789.123456789.123456789.123456789."
++                           "123456789.123456789.123456789.123456789."
++                           "123456789.123456789.123456789.123456789."
++                           "123456789.123456789.123456789.123456789."
++                           "123456789.123456789.123456789.123456789."
++                           "123456789.123456789.123456789.123456789."
++                           "123456789", 1, 1, 0, 0, 0);
++
+        if (fails == 0)
+                printf("I:ok\n");
+        return (fails);
+Index: bind-9.10.2-P4/CHANGES
+===================================================================
+--- bind-9.10.2-P4.orig/CHANGES
++++ bind-9.10.2-P4/CHANGES
+@@ -1,3 +1,9 @@
++4406.  [bug]           getrrsetbyname with a non absolute name could
++                       trigger a infinite recursion bug in lwresd
++                       and named with lwres configured if when combined
++                       with a search list entry the resulting name is
++                       too long. [RT #42694]
++
+ 4322.  [security]      Duplicate EDNS COOKIE options in a response could
+                        trigger an assertion failure. (CVE-2016-2088)
+                        [RT #41809]
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 0dfa314f7a..80c7b44127 100644
--- a/meta/recipes-connectivity/bind/bind_9.10.2-P4.bb
+++ b/meta/recipes-connectivity/bind/bind_9.10.2-P4.bb
@@ -29,6 +29,7 @@ SRC_URI = "ftp://ftp.isc.org/isc/bind9/${PV}/${BPN}-${PV}.tar.gz \
            file://CVE-2016-1286_1.patch \
            file://CVE-2016-1286_2.patch \
            file://CVE-2016-2088.patch \
+           file://CVE-2016-2775.patch \
            "
 
 SRC_URI[md5sum] = "8b1f5064837756c938eadc1537dec5c7"