Citrix Access Gateway LDAP authentication bypass

Overview

An error with LDAP authentication in Citrix Access Gateway appliances may allow an attacker to successfully authenticate without providing correct login credentials.

Description

Citrix Access Gateway appliances use SSL VPN technology to give remote users secure access shared resources. These appliances can authenticate users through the LDAP protocol. Citrix includes LDAP authentication as part of the Advanced Access Control (AAC) options.

A unspecified vulnerability exists in Citrix Access Gateway Appliances that are using AAC version 4.2 with LDAP enabled. If successfully exploited, this vulnerability may allow an attacker to authenticate without supplying valid login credentials.

---

Impact

A remote attacker may be able to gain access to an internal network or shared resource.

---

Solution

Apply Hotfix
Citrix has provided a hotfix to address this issue. See Citrix Knowledge Center Document ID CTX110950 for more details.

---

Do not enable LDAP authentication
If another authentication method is being used, disabling LDAP authentication may mitigate the effects of this vulnerability.

---

Vendor Information

658620

Filter by status: All Affected Not Affected Unknown

Filter by content: __ Additional information available

__ Sort by: Status Alphabetical

Expand all

Javascript is disabled. Click here to view vendors.

Citrix __ Affected

Updated: November 10, 2006

Status

Affected

Vendor Statement

We have not received a statement from the vendor.

Vendor Information

The vendor has not provided us with any further information regarding this vulnerability.

Addendum

See <http://support.citrix.com/article/CTX110950&gt; for more details.

If you have feedback, comments, or additional information about this vulnerability, please send us [email](<mailto:[email protected]?Subject=VU%23658620 Feedback>).

CVSS Metrics

Group	Score	Vector
Base
Temporal
Environmental

References

• <http://support.citrix.com/article/CTX110950&gt;
• <http://www.citrix.com/English/ps2/products/product.asp?contentID=15005&gt;
• <http://secunia.com/advisories/21941/&gt;
• <http://securitytracker.com/alerts/2006/Sep/1016874.html&gt;

Acknowledgements

Thanks to Citrix for information about this vulnerability.

This document was written by Ryan Giobbi.

Other Information

CVE IDs:	CVE-2006-4846
Severity Metric:	1.15 Date Public: