----------------------------------------------------------------------

Want to work within IT-Security?

Secunia is expanding its team of highly skilled security experts.
We will help with relocation and obtaining a work permit.

Currently the following type of positions are available:
http://secunia.com/quality_assurance_analyst/
http://secunia.com/web_application_security_specialist/ 
http://secunia.com/hardcore_disassembler_and_reverse_engineer/

----------------------------------------------------------------------

TITLE:
Kerio Personal Firewall Hooked Functions Denial of Service

SECUNIA ADVISORY ID:
SA22234

VERIFY ADVISORY:
http://secunia.com/advisories/22234/

CRITICAL:
Not critical

IMPACT:
DoS

WHERE:
Local system

SOFTWARE:
Kerio Personal Firewall 4.x
http://secunia.com/product/2654/

DESCRIPTION:
David Matousek has reported some vulnerabilities in Kerio Personal
Firewall, which can be exploited by malicious, local users to cause a
DoS (Denial of Service).

The vulnerabilities are caused due to errors within fwdrv.sys and
khips.sys when handling the parameters of certain hooked functions.
This can be exploited to cause a DoS by calling NtCreateFile,
NtDeleteFile, NtLoadDriver, NtMapViewOfSection, NtOpenFile, and
NtSetInformationFile with specially crafted parameters.

The vulnerability has been reported in Kerio Personal Firewall
4.3.268, 4.3.246, 4.2.3.912. Other versions may also be affected.

SOLUTION:
Restrict access to trusted users only.

PROVIDED AND/OR DISCOVERED BY:
David Matousek

ORIGINAL ADVISORY:
http://www.matousec.com/info/advisories/Kerio-Multiple-insufficient-argument-validation-of-hooked-SSDT-functions.php

----------------------------------------------------------------------

About:
This Advisory was delivered by Secunia as a free service to help
everybody keeping their systems up to date against the latest
vulnerabilities.

Subscribe:
http://secunia.com/secunia_security_advisories/

Definitions: (Criticality, Where etc.)
http://secunia.com/about_secunia_advisories/


Please Note:
Secunia recommends that you verify all advisories you receive by
clicking the link.
Secunia NEVER sends attached files with advisories.
Secunia does not advise people to install third party patches, only
use those supplied by the vendor.

----------------------------------------------------------------------

Unsubscribe: Secunia Security Advisories
http://secunia.com/sec_adv_unsubscribe/?email=packet%40packetstormsecurity.org

----------------------------------------------------------------------