strongswan: Security Advisory - strongswan - CVE-2014-2891

strongSwan before 5.1.2 allows remote attackers to cause a denial of
service (NULL pointer dereference and IKE daemon crash) via a crafted
ID_DER_ASN1_DN ID payload.

http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2014-2891

Signed-off-by: Yue Tao <Yue.Tao@windriver.com>
Signed-off-by: Jackie Huang <jackie.huang@windriver.com>
Signed-off-by: Martin Jansa <Martin.Jansa@gmail.com>

2 files changed, 29 insertions, 0 deletions

diff --git a/meta-networking/recipes-support/strongswan/files/strongswan-4.3.3-5.1.1_asn1_unwrap.patch b/meta-networking/recipes-support/strongswan/files/strongswan-4.3.3-5.1.1_asn1_unwrap.patch
new file mode 100644
index 000000000..374f2cfe6
--- /dev/null
+++ b/meta-networking/recipes-support/strongswan/files/strongswan-4.3.3-5.1.1_asn1_unwrap.patch
@@ -0,0 +1,28 @@
+strongswan: asn1: Properly check length in asn1_unwrap()
+
+Fixes CVE-2014-2891 in strongSwan releases 4.3.3-5.1.1.
+
+Upstream-Status: Pending
+
+Signed-off-by: Yue Tao <yue.tao@windriver.com>
+
+---
+ src/libstrongswan/asn1/asn1.c |    2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/src/libstrongswan/asn1/asn1.c b/src/libstrongswan/asn1/asn1.c
+index d860ad9..9a5f5c5 100644
+--- a/src/libstrongswan/asn1/asn1.c
++++ b/src/libstrongswan/asn1/asn1.c
+@@ -296,7 +296,7 @@ int asn1_unwrap(chunk_t *blob, chunk_t *inner)
+        else
+        {       /* composite length, determine number of length octets */
+                len &= 0x7f;
+-               if (len == 0 || len > sizeof(res.len))
++               if (len == 0 || len > blob->len || len > sizeof(res.len))
+                {
+                        return ASN1_INVALID;
+                }
+-- 
+1.7.10.4
+
diff --git a/meta-networking/recipes-support/strongswan/strongswan_5.1.1.bb b/meta-networking/recipes-support/strongswan/strongswan_5.1.1.bb
index 821d965ea..cfa9abccc 100644
--- a/meta-networking/recipes-support/strongswan/strongswan_5.1.1.bb
+++ b/meta-networking/recipes-support/strongswan/strongswan_5.1.1.bb
@@ -10,6 +10,7 @@ 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 \
+        file://strongswan-4.3.3-5.1.1_asn1_unwrap.patch \
 "
 
 SRC_URI[md5sum] = "e3af3d493d22286be3cd794533a8966a"