fixed segmentation fault caused by malformed attribute certificates

diff --git a/src/libstrongswan/plugins/x509/x509_ac.c b/src/libstrongswan/plugins/x509/x509_ac.c
index 1133060..3861d71 100644 (file)
--- a/src/libstrongswan/plugins/x509/x509_ac.c
+++ b/src/libstrongswan/plugins/x509/x509_ac.c
@@ -990,6 +990,11 @@ static private_x509_ac_t* build(private_builder_t *this)
 
        free(this);
 
+       if (ac == NULL)
+       {
+               return NULL;
+       }
+
        /* synthesis if TRUE or analysis if FALSE */
        if (ac->encoding.ptr == NULL)
        {