Severity: High
Description of Problem
A vulnerability exists in Access Gateway that, in certain configurations, could allow unauthenticated access to network resources.
This vulnerability is present in all versions of the Access Gateway Standard Edition (up to and including 4.5.7) and Advanced Edition (up to and including 4.5 HF2).
Access Gateway Enterprise Edition is not affected by this vulnerability.
Mitigating Factors
Customers using the Access Gateway appliance in Access Gateway or Secure Gateway modes are not affected by this vulnerability.
Citrix recommends that customers with Internet-facing deployments implement strong authentication.
What Customers Should Do
This vulnerability has been addressed in Access Gateway Standard Edition appliance firmware version 4.5.7 Rev A.
Citrix strongly recommends that customers upgrade their appliance firmware to version 4.5.7 Rev A. This firmware upgrade can be obtained from the following location:
http://support.citrix.com/article/CTX116762
Customers using appliance firmware versions 4.5.5, 4.5.6 and 4.5.7 can apply a patch to their current appliance firmware to correct this vulnerability. Customers should be aware that applying these files could cause some custom software configurations to become non-functional.
The patch can be obtained from the following locations:
http://support.citrix.com/article/CTX117001
What Citrix Is Doing
Citrix is notifying customers and channel partners about this potential security issue. This article is also available from the Citrix Knowledge center 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://www.citrix.com/English/ss/supportContacts.asp.
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.
