http://cvs.openssl.org/chngview?cn=21957

diff -Naurp openssl-1.0.0a/engines/ccgost/gost2001_keyx.c openssl-1.0.0a.oden/engines/ccgost/gost2001_keyx.c
--- openssl-1.0.0a/engines/ccgost/gost2001_keyx.c	2009-06-16 16:39:20.000000000 +0000
+++ openssl-1.0.0a.oden/engines/ccgost/gost2001_keyx.c	2012-01-09 14:56:51.000000000 +0000
@@ -280,6 +280,10 @@ int pkey_GOST01cp_decrypt(EVP_PKEY_CTX *
 		}
 		
 	param = get_encryption_params(gkt->key_agreement_info->cipher);
+    if(!param){
+        goto err;
+    }
+
 	gost_init(&ctx,param->sblock);	
 	OPENSSL_assert(gkt->key_agreement_info->eph_iv->length==8);
 	memcpy(wrappedKey,gkt->key_agreement_info->eph_iv->data,8);
diff -Naurp openssl-1.0.0a/engines/ccgost/gost94_keyx.c openssl-1.0.0a.oden/engines/ccgost/gost94_keyx.c
--- openssl-1.0.0a/engines/ccgost/gost94_keyx.c	2010-05-22 00:40:58.000000000 +0000
+++ openssl-1.0.0a.oden/engines/ccgost/gost94_keyx.c	2012-01-09 14:56:51.000000000 +0000
@@ -261,6 +261,10 @@ int pkey_GOST94cp_decrypt(EVP_PKEY_CTX *
 		}
 
 	param = get_encryption_params(gkt->key_agreement_info->cipher);
+    if(!param){
+        goto err;
+    }
+	
 	gost_init(&cctx,param->sblock);	
 	OPENSSL_assert(gkt->key_agreement_info->eph_iv->length==8);
 	memcpy(wrappedKey,gkt->key_agreement_info->eph_iv->data,8);