package/ipsec-tools: add security patch to fix CVE-2015-4047

Signed-off-by: Bernd Kuhls <bernd.kuhls@t-online.de>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

package/ipsec-tools/0004-CVE-2015-4047.patch

@@ -0,0 +1,26 @@
+ipsec-tools: CVE-2015-4047: null pointer dereference crash in racoon
+
+See: https://bugs.gentoo.org/show_bug.cgi?id=550118
+
+Downloaded from
+https://gitweb.gentoo.org/repo/gentoo.git/tree/net-vpn/ipsec-tools/files/ipsec-tools-CVE-2015-4047.patch
+
+See also
+https://sources.debian.net/src/ipsec-tools/1:0.8.2%2B20140711-8/debian/patches/bug785778-null-pointer-deref.patch/
+
+Signed-off-by: Bernd Kuhls <bernd.kuhls@t-online.de>
+
+--- ./src/racoon/gssapi.c    9 Sep 2006 16:22:09 -0000       1.4
++++ ./src/racoon/gssapi.c    19 May 2015 15:16:00 -0000      1.6
+@@ -192,6 +192,11 @@
+	gss_name_t princ, canon_princ;
+	OM_uint32 maj_stat, min_stat;
+ 
++	if (iph1->rmconf == NULL) {
++		plog(LLV_ERROR, LOCATION, NULL, "no remote config\n");
++		return -1;
++	}
++
+	gps = racoon_calloc(1, sizeof (struct gssapi_ph1_state));
+	if (gps == NULL) {
+		plog(LLV_ERROR, LOCATION, NULL, "racoon_calloc failed\n");