1 files changed, 57 insertions, 0 deletions

diff --git a/meta/recipes-core/busybox/busybox/CVE-2016-2147.patch b/meta/recipes-core/busybox/busybox/CVE-2016-2147.patch
new file mode 100644
index 0000000000..84cae6aa2c
--- /dev/null
+++ b/meta/recipes-core/busybox/busybox/CVE-2016-2147.patch
@@ -0,0 +1,57 @@
+From d474ffc68290e0a83651c4432eeabfa62cd51e87 Mon Sep 17 00:00:00 2001
+From: Denys Vlasenko <vda.linux@googlemail.com>
+Date: Thu, 10 Mar 2016 11:47:58 +0100
+Subject: [PATCH] udhcp: fix a SEGV on malformed RFC1035-encoded domain name
+
+Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
+
+Upstream-Status: Backport
+CVE: CVE-2016-2147
+
+https://git.busybox.net/busybox/commit/?id=d474ffc
+Signed-off-by: Armin Kuster <akuster@mvista.com>
+
+---
+ networking/udhcp/domain_codec.c | 13 +++++++++----
+ 1 file changed, 9 insertions(+), 4 deletions(-)
+
+Index: busybox-1.23.2/networking/udhcp/domain_codec.c
+===================================================================
+--- busybox-1.23.2.orig/networking/udhcp/domain_codec.c
++++ busybox-1.23.2/networking/udhcp/domain_codec.c
+@@ -63,11 +63,10 @@ char* FAST_FUNC dname_dec(const uint8_t
+                                if (crtpos + *c + 1 > clen) /* label too long? abort */
+                                        return NULL;
+                                if (dst)
+-                                       memcpy(dst + len, c + 1, *c);
++                                       /* \3com ---> "com." */
++                                       ((char*)mempcpy(dst + len, c + 1, *c))[0] = '.';
+                                len += *c + 1;
+                                crtpos += *c + 1;
+-                               if (dst)
+-                                       dst[len - 1] = '.';
+                        } else {
+                                /* NUL: end of current domain name */
+                                if (retpos == 0) {
+@@ -78,7 +77,10 @@ char* FAST_FUNC dname_dec(const uint8_t
+                                        crtpos = retpos;
+                                        retpos = depth = 0;
+                                }
+-                               if (dst)
++                               if (dst && len != 0)
++                                       /* \4host\3com\0\4host and we are at \0:
++                                        * \3com was converted to "com.", change dot to space.
++                                        */
+                                        dst[len - 1] = ' ';
+                        }
+ 
+@@ -228,6 +230,9 @@ int main(int argc, char **argv)
+        int len;
+        uint8_t *encoded;
+ 
++        uint8_t str[6] = { 0x00, 0x00, 0x02, 0x65, 0x65, 0x00 };
++        printf("NUL:'%s'\n",   dname_dec(str, 6, ""));
++
+ #define DNAME_DEC(encoded,pre) dname_dec((uint8_t*)(encoded), sizeof(encoded), (pre))
+        printf("'%s'\n",       DNAME_DEC("\4host\3com\0", "test1:"));
+        printf("test2:'%s'\n", DNAME_DEC("\4host\3com\0\4host\3com\0", ""));