Vulnerabilities in Access Gateway Advanced Edition could allow redirection to arbitrary web sites

Severity: Medium

Description of Problem

Vulnerabilities have been identified in Access Gateway Advanced Edition that may allow an attacker to redirect a user to an arbitrary web site. It may be possible for an attacker to exploit this type of behavior to facilitate phishing attacks.

These vulnerabilities affect all versions of Access Gateway Advanced Edition when deployed with an Access Gateway appliance with firmware version up to and including 4.5.2. Access Gateway Standard and Access Gateway Enterprise Editions are not vulnerable to these issues.

What Customers Should Do

This vulnerability has been addressed in the Access Gateway firmware version 4.5.5.

Due to this and other issues (listed below), Citrix strongly recommends that customers upgrade their Access Gateway appliance to firmware version 4.5.5 and upgrade to Access Gateway Advanced Edition 4.5 HF1. These upgrades can be obtained from the following locations:

Access Gateway Appliance firmware 4.5.5:

- http://support.citrix.com/article/CTX114028

Advanced Access Control HF1:

- http://support.citrix.com/article/CTX112803

Related Bulletins

For information on bulletins related to this issue, please see the Citrix Support website:

http://support.citrix.com/article/CTX113814

http://support.citrix.com/article/CTX113815

http://support.citrix.com/article/CTX113817

Acknowledgements

Citrix thanks Cyrill Brunschwiler of Compass Security Network Computing AG for working with us to protect Citrix customers.

What Citrix Is Doing

Citrix is proactively notifying customers and channel partners about this potential security issue. This article is also available from the Citrix Knowledge Base at http://support.citrix.com/.

Obtaining Support on this Issue

If you require technical assistance with this issue, please contact Citrix Technical Support. Information for contacting Citrix Technical Support is available at http://support.citrix.com/.

Reporting Security Vulnerabilities to Citrix

Citrix welcomes input regarding the security of its products and considers any and all potential vulnerabilities very seriously. If you would like to report a security issue to Citrix, please compose an e-mail to secure@citrix.com containing the exact version of the product in which the vulnerability was found and the steps needed to reproduce the vulnerability.