Citrix XenApp (formerly Presentation Server) 4.5 Hotfix Rollup Pack 3 does not apply an access policy when it is defined with the Access Gateway Advanced Edition filters, which allows attackers to bypass intended access restrictions via unknown vectors.

The installation process for Citrix Presentation Server 4.5 and Desktop Server 1.0, when MSI logging is enabled, stores database credentials in MSI log files, which allows local users to obtain these credentials by reading the log files.

Unspecified vulnerability in SecureICA and ICA Basic encryption of Citrix Presentation Server 4.5 and earlier, Access Essentials 2.0 and earlier, and Desktop Server 1.0 can cause clients to use weaker encryption settings than configured by the administrator, which might allow attackers to bypass intended restrictions.

Unspecified vulnerability in Citrix Presentation Server 4.5 and earlier, Citrix Access Essentials 2.0 and earlier, and Citrix Desktop Server 1.0 allows remote authenticated users to access unauthorized desktops via unknown attack vectors.