Citrix Access Gateway AAC LDAP authentication bypass
| citrix-acc-ldap-auth-bypass (28990) |  Medium Risk |
Description:
Citrix Access Gateway could allow a remote attacker to bypass security restrictions caused by an error in the Advanced Access Control option (AAC) when using LDAP authentication. A remote attacker could exploit this vulnerability to bypass authentication and gain unauthorized access to the system.
*CVSS:
| Base Score: | 4.7 |
| Access Vector: | Remote |
| Access Complexity: | Low |
| Authentication: | Not Required |
| Confidentiality Impact: | Partial |
| Integrity Impact: | Partial |
| Availability Impact: | None |
| Temporal Score: | 3.5 |
| Exploitability: | Unproven |
| Remediation Level: | Official-Fix |
| Report Confidence: | Confirmed |
Consequences:
Bypass Security
Remedy:
Apply Hotfix AAC420W004, as listed in Citrix Knowledge Center Article CTX110439. See References.
References:
- Citrix Access Gateway Web site: Citrix Systems Products Citrix Access Gateway Standard Edition.
- CTX110439: Hotfix AAC420W004 - For Access Gateway - Advanced Access Control 4.2 for Windows Server 2000 & 2003 .
- CTX110950: LDAP authentication vulnerability in Access Gateway Advanced Access Control .
- BID-20066: Citrix Access Gateway AAC LDAP Authentication Bypass Vulnerability
- CVE-2006-4846: Unspecified vulnerability in Citrix Access Gateway with Advanced Access Control (AAC) 4.2 before 20060914, when AAC is configured to use LDAP authentication, allows remote attackers to bypass authentication via unknown vectors.
- OSVDB ID: 28938: Citrix Access Gateway Advanced Access Control (AAC) LDAP Authentication Bypass
- SA21941: Citrix Access Gateway Advanced Access Control Authentication Bypass
- SECTRACK ID: 1016874: Citrix Access Gateway LDAP Authentication Flaw Grants Access to Remote Users
- US-CERT VU#658620: Citrix Access Gateway LDAP authentication bypass
- VUPEN/ADV-2006-3643: Citrix Access Gateway Advanced Access Control LDAP Authentication Bypass
Platforms Affected:
- Citrix Access Gateway 4.2
Reported:
Sep 15, 2006
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* According to the Forum of Incident Response and Security Teams (FIRST), the Common Vulnerability Scoring System (CVSS) is an "industry open standard designed to convey vulnerability severity and help to determine urgency and priority of response." IBM PROVIDES THE CVSS SCORES "AS IS" WITHOUT WARRANTY OF ANY KIND, INCLUDING THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. CUSTOMERS ARE RESPONSIBLE FOR ASSESSING THE IMPACT OF ANY ACTUAL OR POTENTIAL SECURITY VULNERABILITY.
The information within this database may change without notice. Use of this information constitutes acceptance for use in an AS IS condition. There are NO warranties, implied or otherwise, with regard to this information or its use. Any use of this information is at the user's risk. In no event shall IBM be held liable for any damages whatsoever arising out of or in connection with the use or spread of this information.