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published in(发表于) 2013/11/13 7:34:03
Each handset in the second hidden operating system

Each cell phone hidden in the second operating system-RTOS,Android,iOS-IT information Each cell phone hidden in the second operating system

Each Department has a mobile communication function of phones running two operating systems: end user familiar with Android and iOS, but there is also a real time operating system (RTOS) to manage radio functions. The operating system is stored in the firmware, running on the baseband processor. These baseband RTOS system is private.

For example, the RTOS runs on Gao Tongji processor system called AMSS, REX kernel based on Qualcomm private, constituted by the 69 concurrent tasks, deal with everything from USB to GPS, it runs in a ARMv5 processor. These proprietary closed source software have never been properly peer-reviewed, quality really worrying. Security researcher Ralf-Philipp Weinmann reverse engineering of the University of Luxembourg, Qualcomm and Infineon baseband processor software, easily found a lot of the bug. These vulnerabilities may allow an attacker to cause code to execute remotely, cause the device to crash, you can use the Hayes command set started quietly answering.

每部手机里都藏着第二个操作系统 - RTOS,Android,iOS - IT资讯
每部手机里都藏着第二个操作系统

每部具有移动通信功能的手机都运行着两个操作系统：在终端用户熟悉的Android和iOS外，还有一个实时操作系统（RTOS）管理着无线电功能。这个操作系统储存在固件，运行在基带处理器上。这些基带RTOS系统都是私有的。

例如，运行在高通基带处理器的RTOS系统叫AMSS，基于高通私有的REX内核，由69个并发任务构成，处理从USB到GPS的一切事物，它运行在一个ARMv5处理器上。这些私有闭源的软件从未经过恰当的同行评审，实际上质量堪忧。Luxembourg大学的安全研究员Ralf-Philipp Weinmann逆向工程了高通和英飞凌的基带处理器软件，轻而易举的就发现了大量的bug。这些漏洞可以让攻击者远程执行代码，导致设备崩溃，可以用Hayes命令集悄悄启动自动应答。

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