The security policy processing module in Huawei Secospace USG6300 with software V500R001C20SPC100, V500R001C20SPC101, V500R001C20SPC200; Secospace USG6500 with software V500R001C20SPC100, V500R001C20SPC101, V500R001C20SPC200; Secospace USG6600 with software V500R001C20SPC100, V500R001C20SPC101, V500R001C20SPC200 allows authenticated attackers to setup a specific security policy into the devices, causing a buffer overflow and crashing the system.