Title: Sunbelt Kerio Personal Firewall Multiple Local Denial of Service Vulnerabilities
Severity: MODERATE
Description:
Sunbelt Kerio Personal Firewall is a firewall implementation for desktop computers running Microsoft Windows.
Sunbelt Kerio Personal Firewall is prone to multiple local denial-of-service vulnerabilities because the application fails to properly sanitize user-supplied input.
These issues occur due to improper input-sanitization in the functions used while hooking SSDT functions in the operating system. The following functions are vulnerable:
NtCreateFile
NtDeleteFile
NtLoadDriver
NtMapViewOfSection
NtOpenFile
NtSetInformationFile
When these functions receive invalid arguments, a complete computer crash may occur, denying further service to legitimate users.
Exploiting these vulnerabilities allows local attackers to crash affected systems, facilitating a denial-of-service condition on the local computer. Code execution may also be possible, but this has not been confirmed.
Affected Products:
- Kerio Personal Firewall 4.2.3 .912
- Kerio Personal Firewall 4.3.246
- Kerio Personal Firewall 4.3.268
References:
- Kerio: Kerio Personal Firewall Home Page
- Matousec: Kerio Multiple insufficient argument validation of hooked SSDT function Vulnerab
- Matousec: Windows Personal Firewall Analysis
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