strongswan: add security patches

Security patches to fix CVE-2013-5018, CVE-2013-6075 and CVE-2013-6076.

Signed-off-by: Gustavo Zacarias <gustavo@zacarias.com.ar>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

package/strongswan/strongswan-0003-CVE-2013-5018-fix.patch

@@ -0,0 +1,29 @@
+From 057265e0183ddf52d56f21adaf0db0f3dc6585a4 Mon Sep 17 00:00:00 2001
+From: Tobias Brunner <tobias@strongswan.org>
+Date: Mon, 29 Jul 2013 23:45:38 +0200
+Subject: [PATCH] asn1: Fix handling of invalid ASN.1 length in is_asn1()
+
+Fixes CVE-2013-5018.
+---
+ src/libstrongswan/asn1/asn1.c |    5 +++++
+ 1 file changed, 5 insertions(+)
+
+diff --git a/src/libstrongswan/asn1/asn1.c b/src/libstrongswan/asn1/asn1.c
+index 68f37f4..d860ad9 100644
+--- a/src/libstrongswan/asn1/asn1.c
++++ b/src/libstrongswan/asn1/asn1.c
+@@ -642,6 +642,11 @@ bool is_asn1(chunk_t blob)
+ 
+ 	len = asn1_length(&blob);
+ 
++	if (len == ASN1_INVALID_LENGTH)
++	{
++		return FALSE;
++	}
++
+ 	/* exact match */
+ 	if (len == blob.len)
+ 	{
+-- 
+1.7.10.4
+

package/strongswan/strongswan-0004-CVE-2013-6075-fix.patch

@@ -0,0 +1,27 @@
+From aa277adfc204b6bda2c3792710138f9a8723a8f1 Mon Sep 17 00:00:00 2001
+From: Martin Willi <martin@revosec.ch>
+Date: Mon, 7 Oct 2013 14:21:57 +0200
+Subject: [PATCH] identification: Properly check length before comparing for
+ binary DN equality
+
+Fixes CVE-2013-6075.
+---
+ src/libstrongswan/utils/identification.c | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/src/libstrongswan/utils/identification.c b/src/libstrongswan/utils/identification.c
+index 5df3e5f..9c43ad5 100644
+--- a/src/libstrongswan/utils/identification.c
++++ b/src/libstrongswan/utils/identification.c
+@@ -602,7 +602,7 @@ static bool compare_dn(chunk_t t_dn, chunk_t o_dn, int *wc)
+ 		}
+ 	}
+ 	/* try a binary compare */
+-	if (memeq(t_dn.ptr, o_dn.ptr, t_dn.len))
++	if (chunk_equals(t_dn, o_dn))
+ 	{
+ 		return TRUE;
+ 	}
+-- 
+1.8.1.2
+

package/strongswan/strongswan-0005-CVE-2013-6076-fix.patch

@@ -0,0 +1,27 @@
+From d8867a8452eece3fffab29605f48e6bed47c42d4 Mon Sep 17 00:00:00 2001
+From: =?UTF-8?q?Volker=20R=C3=BCmelin?= <vr_strongswan@t-online.de>
+Date: Fri, 11 Oct 2013 09:38:24 +0200
+Subject: [PATCH] ikev1: Properly initialize list of fragments in case fragment
+ ID is 0
+
+Fixes CVE-2013-6076.
+---
+ src/libcharon/sa/ikev1/task_manager_v1.c | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/src/libcharon/sa/ikev1/task_manager_v1.c b/src/libcharon/sa/ikev1/task_manager_v1.c
+index 6d4ef14..597416e 100644
+--- a/src/libcharon/sa/ikev1/task_manager_v1.c
++++ b/src/libcharon/sa/ikev1/task_manager_v1.c
+@@ -1273,7 +1273,7 @@ static status_t handle_fragment(private_task_manager_t *this, message_t *msg)
+ 		return FAILED;
+ 	}
+ 
+-	if (this->frag.id != payload->get_id(payload))
++	if (!this->frag.list || this->frag.id != payload->get_id(payload))
+ 	{
+ 		clear_fragments(this, payload->get_id(payload));
+ 		this->frag.list = linked_list_create();
+-- 
+1.8.1.2
+