Title: Sygate Personal Firewall DLL Authentication Bypass Vulnerability
Severity: MODERATE
Description:
Sygate Personal Firewall is a personal firewall application for Microsoft Windows operating systems. Sygate Personal Firewall supports an "Enable DLL authentication" option designed to prompt the user every time a DLL that has not been previously authorized is loaded by an application that has been authorized to access the Internet.
A vulnerability has been reported to affect Sygate Personal Firewall that may allow a user to bypass DLL authentication controls. The issue has been reported to present itself in the routines that are used to enforce DLL authentication. These routines unsafely assume that all DLL libraries will be loaded with LoadLibraryA() or LoadLibraryW() calls, if a DLL is loaded with custom Portable Executable loaders, for example, the loaders used in packing utilities, DLL authentication controls can be bypassed.
A local attacker may exploit this condition to bypass Sygate Personal Firewall DLL authentication controls. It should be noted that this vulnerability might also be leveraged by malicious applications to bypass firewall access controls.
Affected Products:
- Sygate Sygate Personal Firewall 5.0.0
- Sygate Sygate Personal Firewall 5.1.1615
- Sygate Sygate Personal Firewall Pro 5.0.0
- Sygate Sygate Personal Firewall Pro 5.0.1
References:
- Sygate: Sygate Homepage
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