Huawei DP300 V500R002C00; RP200 V500R002C00; V600R006C00; TE30 V100R001C10; V600R006C00; TE50 V600R006C00; TE60 V100R001C10; V500R002C00; V600R006C00; VP9660 V500R002C10 have an DoS vulnerability due to insufficient validation of the parameter when a putty comment key is loaded. An authenticated remote attacker can place a malformed putty key file in system when a system manager load the key an infinite loop happens which lead to reboot the system.