Vulnerability Note VU#555220

Citrix Access Gateway appliances vulnerable to information disclosure

Overview

A vulnerability exists in Citrix Access Gateway appliances that may allow an attacker to access data and compromise the system.

I. Description

Citrix Access Gateway products are universal SSL VPN appliances providing a secure, always-on, single point-of-access to an organization's applications and data. Some versions can be configured to have administrative and access control policy functions centralized in configurations using Advanced Access Control with an Access Gateway appliance. According to Citrix:

When using Advanced Access Control with an Access Gateway appliance, unauthenticated remote users may be able to gain access to data on the Access Gateway appliance. The information disclosed could potentially lead to a compromise of the appliance.

This vulnerability affects the following products:
• Access Gateway 4.5 Advanced Edition
• Access Gateway 4.2 with Advanced Access Control 4.2 (currently known as Access Gateway 4.2 Advanced Edition)
When deployed with:
• Access Gateway appliance 4.2
• Access Gateway appliance 4.2.1
• Access Gateway appliance 4.2.2
Access Gateway appliances deployed without Advanced Access Control are not vulnerable to this issue.

II. Impact

A remote, unauthenticated attacker may be able to gain access to sensitive data from an affected device. This information disclosure could supplement additional attacks and potentially lead to a compromise of the affected device.

III. Solution

Apply an Update

Citrix has released product updates that address this issue. Please see Citrix document CTX111695 for further information.

Systems Affected

Vendor	Status	Date Updated
Citrix	Vulnerable	24-Jan-2007

References

http://support.citrix.com/article/CTX111695
http://secunia.com/advisories/22908/

Credit

This issue was reported in Citrix document CTX111695. Citrix thanks Thierry Zoller and Laurent Kempenaar for reporting the issue.

This document was written by Katie Steiner.

Other Information

Date Public	11/15/2006
Date First Published	01/29/2007 08:51:43 AM
Date Last Updated	01/29/2007
CERT Advisory
CVE Name	CVE-2006-6573
Metric	0.00
Document Revision	7

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