uclibc: Security fix CVE-2016-2224

CVE-2016-2224 Do not follow compressed items forever.

This change is being provide to comply to Yocto compatiblity.

(From OE-Core rev: 4fe0654253d7444f2c445a30b06623cef036b2bb)

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

2 files changed, 50 insertions, 0 deletions

diff --git a/meta/recipes-core/uclibc/uclibc-git.inc b/meta/recipes-core/uclibc/uclibc-git.inc
index dcb616d0d2..d3fb2a8a8e 100644
--- a/meta/recipes-core/uclibc/uclibc-git.inc
+++ b/meta/recipes-core/uclibc/uclibc-git.inc
@@ -19,5 +19,6 @@ SRC_URI = "git://uclibc.org/uClibc.git;branch=master \
         file://0001-gcc5-optimizes-away-the-write-only-static-functions-.patch \
         file://0001-fcntl-Add-AT_EMPTY_PATH-for-all-and-O_PATH-for-arm.patch \
         file://0001-wire-in-syncfs.patch \
+        file://CVE-2016-2224.patch \
 "
 S = "${WORKDIR}/git"
diff --git a/meta/recipes-core/uclibc/uclibc-git/CVE-2016-2224.patch b/meta/recipes-core/uclibc/uclibc-git/CVE-2016-2224.patch
new file mode 100644
index 0000000000..218b60a85c
--- /dev/null
+++ b/meta/recipes-core/uclibc/uclibc-git/CVE-2016-2224.patch
@@ -0,0 +1,49 @@
+From 16719c1a7078421928e6d31dd1dec574825ef515 Mon Sep 17 00:00:00 2001
+From: Waldemar Brodkorb <wbx@openadk.org>
+Date: Sun, 17 Jan 2016 15:47:22 +0100
+Subject: [PATCH] Do not follow compressed items forever.
+
+It is possible to get stuck in an infinite loop when receiving a
+specially crafted DNS reply. Exit the loop after a number of iteration
+and consider the packet invalid.
+
+Signed-off-by: Daniel Fahlgren <daniel@fahlgren.se>
+Signed-off-by: Waldemar Brodkorb <wbx@uclibc-ng.org>
+
+Upstream-status: Backport
+http://repo.or.cz/uclibc-ng.git/commit/16719c1a7078421928e6d31dd1dec574825ef515
+
+CVE: CVE-2016-2224
+Signed-off-by: Armin Kuster <akuster@mvista.com>
+
+---
+ libc/inet/resolv.c | 5 ++++-
+ 1 file changed, 4 insertions(+), 1 deletion(-)
+
+Index: git/libc/inet/resolv.c
+===================================================================
+--- git.orig/libc/inet/resolv.c
++++ git/libc/inet/resolv.c
+@@ -666,11 +666,12 @@ int __decode_dotted(const unsigned char
+        bool measure = 1;
+        unsigned total = 0;
+        unsigned used = 0;
++       unsigned maxiter = 256;
+ 
+        if (!packet)
+                return -1;
+ 
+-       while (1) {
++       while (--maxiter) {
+                if (offset >= packet_len)
+                        return -1;
+                b = packet[offset++];
+@@ -707,6 +708,8 @@ int __decode_dotted(const unsigned char
+                else
+                        dest[used++] = '\0';
+        }
++       if (!maxiter)
++               return -1;
+ 
+        /* The null byte must be counted too */
+        if (measure)