[OE-core] [Jethro][PATCH 1/2] uclibc: Security fix CVE-2016-2224

[Armin Kuster]

From: Armin Kuster <akuster at mvista.com>

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

This change is being provide to comply to Yocto compatiblity.

Signed-off-by: Armin Kuster <akuster at mvista.com>
---
 meta/recipes-core/uclibc/uclibc-git.inc            |  1 +
 .../uclibc/uclibc-git/CVE-2016-2224.patch          | 49 ++++++++++++++++++++++
 2 files changed, 50 insertions(+)
 create mode 100644 meta/recipes-core/uclibc/uclibc-git/CVE-2016-2224.patch

diff --git a/meta/recipes-core/uclibc/uclibc-git.inc b/meta/recipes-core/uclibc/uclibc-git.inc
index dcb616d..d3fb2a8 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 0000000..218b60a
--- /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 at 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 at fahlgren.se>
+Signed-off-by: Waldemar Brodkorb <wbx at 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 at 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)
-- 
2.3.5