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Arrow  Topic :

Kerio Multiple insufficient argument validation of hooked SSDT function Vulnerability


Arrow  SecurityAlert : 1685
Arrow  CVE : CVE-2006-5153
Arrow  SecurityRisk : Low  Security Risk Low  (About)
Arrow  Remote Exploit : No
Arrow  Local Exploit : No
Arrow  Exploit Available : No
Arrow  Credit : David Matousek (david matousec com)
Arrow  Published : 05.10.2006

Arrow  Affected Software : Kerio Personal Firewall



Arrow  Advisory Content :  

Hello,

I would like to inform you about a vulnerability in Sunbelt Kerio Personal
Firewall.

Description:

Sunbelt Kerio Personal Firewall hooks many functions in SSDT and in at
least six cases it fails to validate arguments
that come from user mode. User calls to NtCreateFile, NtDeleteFile,
NtLoadDriver, NtMapViewOfSection, NtOpenFile,
NtSetInformationFile with invalid argument values can cause system crashes
because of errors in Kerio drivers fwdrv.sys
and khips.sys. Further impacts of this bug (like arbitrary code execution
in the kernel mode) were not examined.

Vulnerable software:

* Sunbelt Kerio Personal Firewall 4.3.268
* Sunbelt Kerio Personal Firewall 4.3.246
* Sunbelt Kerio Personal Firewall 4.2.3.912
* probably all versions of Sunbelt Kerio Personal Firewall 4
* possibly older versions of Sunbelt Kerio Personal Firewall

More details and a proof of concept including source code is available
here:
http://www.matousec.com/info/advisories/Kerio-Multiple-insufficient-argu
ment-validation-of-hooked-SSDT-functions.php

Regards,

--
David Matousek

Founder and Chief Representative of Matousec - Transparent security
http://www.matousec.com/





Arrow  Feedback :

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