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strongswan: Security Advisory - strongswan - CVE-2014-2338

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IKEv2 in strongSwan 4.0.7 before 5.1.3 allows remote attackers to bypass
authentication by rekeying an IKE_SA during (1) initiation or (2)
re-authentication, which triggers the IKE_SA state to be set to
established.

http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2014-2338

Signed-off-by: Yue Tao <Yue.Tao@windriver.com>
Signed-off-by: Roy Li <rongqing.li@windriver.com>
Signed-off-by: Joe MacDonald <joe@deserted.net>
This commit is contained in:
Yue Tao
2014-05-09 17:05:50 +08:00
committed by Joe MacDonald
parent 9747141c09
commit 6938319b32
2 changed files with 37 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files
meta-networking/recipes-support/strongswan/files/strongswan-5.0.0-5.1.2_reject_child_sa.patch
+36
View File
@@ -0,0 +1,36 @@
From b980ba7757dcfedd756aa055b3271ea58cf85aa6 Mon Sep 17 00:00:00 2001
From: Martin Willi <martin@revosec.ch>
Date: Thu, 20 Feb 2014 16:08:43 +0100
Subject: [PATCH] ikev2: Reject CREATE_CHILD_SA exchange on unestablished
IKE_SAs
Prevents a responder peer to trick us into established state by starting
IKE_SA rekeying before the IKE_SA has been authenticated during IKE_AUTH.
Fixes CVE-2014-2338 for 5.x versions of strongSwan.
---
src/libcharon/sa/ikev2/task_manager_v2.c | 9 +++++++++
1 file changed, 9 insertions(+)
diff --git a/src/libcharon/sa/ikev2/task_manager_v2.c b/src/libcharon/sa/ikev2/task_manager_v2.c
index ac3be90..a5252ab 100644
--- a/src/libcharon/sa/ikev2/task_manager_v2.c
+++ b/src/libcharon/sa/ikev2/task_manager_v2.c
@@ -780,6 +780,15 @@ static status_t process_request(private_
case CREATE_CHILD_SA:
{ /* FIXME: we should prevent this on mediation connections */
bool notify_found = FALSE, ts_found = FALSE;
+
+ if (this->ike_sa->get_state(this->ike_sa) == IKE_CREATED ||
+ this->ike_sa->get_state(this->ike_sa) == IKE_CONNECTING)
+ {
+ DBG1(DBG_IKE, "received CREATE_CHILD_SA request for "
+ "unestablished IKE_SA, rejected");
+ return FAILED;
+ }
+
enumerator = message->create_payload_enumerator(message);
while (enumerator->enumerate(enumerator, &payload))
{
--
1.8.1.2
meta-networking/recipes-support/strongswan/strongswan_5.1.1.bb
+1
View File
@@ -9,6 +9,7 @@ DEPENDS = "gmp openssl flex-native flex bison-native"
SRC_URI = "http://download.strongswan.org/strongswan-${PV}.tar.bz2 \
file://fix-funtion-parameter.patch \
file://strongswan-5.0.0-5.1.2_reject_child_sa.patch \
"
SRC_URI[md5sum] = "e3af3d493d22286be3cd794533a8966a"