CVE-2009-0803: Smoothwall Networkguardian

Medium severity, CVSS 5.4. EPSS: 2.4% chance of exploitation in the next 30 days.

SmoothWall SmoothGuardian, as used in SmoothWall Firewall, NetworkGuardian, and SchoolGuardian 2008, when transparent interception mode is enabled, uses the HTTP Host header to determine the remote endpoint, which allows remote attackers to bypass access controls for Flash, Java, Silverlight, and probably other technologies, and possibly communicate with restricted intranet sites, via a crafted web page that causes a client to send HTTP requests with a modified Host header.

Affected products

• Smoothwall Networkguardian: version 2008 only
• Smoothwall Schoolguardian: version 2008 only
• Smoothwall Smoothguardian: version 2008 only

Published 2009-03-04. Last modified 2026-06-16.