what you don't know can hurt you

Post Indexer 3.0.6.1 Man-In-The-Middle

Post Indexer 3.0.6.1 Man-In-The-Middle
Posted Nov 19, 2016
Authored by Glyn Wintle

Post Indexer version 3.0.6.1 suffers from a man-in-the-middle vulnerability that may allow for arbitrary code execution.

tags | advisory, arbitrary, code execution
MD5 | 207e444add72f56a61bf15cea01208cb

Post Indexer 3.0.6.1 Man-In-The-Middle

Change Mirror Download
Details
================
Software: Post Indexer
Version: 3.0.6.1
Homepage: http://premium.wpmudev.org/project/post-indexer/
Advisory report: https://security.dxw.com/advisories/unserialisation-in-post-indexer-could-allow-man-in-the-middle-to-execute-arbitrary-code-in-some-circumstances/
CVE: Awaiting assignment
CVSS: 7.6 (High; AV:N/AC:H/Au:N/C:C/I:C/A:C)

Description
================
Unserialisation in Post Indexer could allow man-in-the-middle to execute arbitrary code (in some circumstances)

Vulnerability
================



Twice a day the blog makes an automated unencrypted HTTPA request to premium.wpmudev.org and the value that is returned is passed to unserialize(). It is possible for premium.wpmudev.orgA or any one on the network in a man-in-the-middle position to return a string that contains an evil encoded object that executes arbitrary code (depending on the active plugins and themes).
This code is called twice a day by wp_schedule_event(time(), \'twicedaily\', \'wpmudev_scheduled_jobs\')A (extra/wpmudev-dash-notification.php):



var $server_url = \'http://premium.wpmudev.org/wdp-un.php\'; // line 12
$url = $this->server_url . \'?action=check&un-version=3.3.3&wp=\' . urlencode($wp) . \'&bcount=\' . $blog_count . \'&domain=\' . urlencode(network_site_url()) . $projects; // line 393
$response = wp_remote_get($url, $options); // line 400
$data = $response[\'body\']; // line 402
$data = unserialize($data); // line 404
There is a class called ProcessLocker in this pluginA with an exploitableA __destructA method, which could be used as a jumping-off point for attacks using this unserialize()A vulnerability (or the use ofA unserialize()A in WordPress core which requires access to the database to exploit).

Proof of concept
================
AchievingA arbitrary code executionA depends onA which classes are available (i.e. which plugins and themes are installed and active). It wonat be possible in all situations.

Mitigations
================
Upgrade to version 3.0.6.2 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
================

2016-11-01: Discovered
2016-11-14: Reported to plugin author viaA https://premium.wpmudev.org/contact/
2016-11-14:A Plugin author responded
2016-11-17: Confirmed that version 3.0.6.2 fixes the issue
2016-11-17:A Requested CVE
2016-11-17:A Advisory published



Discovered by dxw:
================
Glyn Wintle
Please visit security.dxw.com for more information.




Login or Register to add favorites

File Archive:

April 2021

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

Top Authors In Last 30 Days

File Tags

Systems

packet storm

© 2020 Packet Storm. All rights reserved.

Services
Security Services
Hosting By
Rokasec
close