[security-alerts] FW: [SA21941] Citrix Access Gateway Advanced Access Control Authentication Bypass

["Kazennov, Vladimir" <Vladimir.Kazennov@xxxxxxxxxx>]

> 
> TITLE:
> Citrix Access Gateway Advanced Access Control Authentication Bypass
> 
> SECUNIA ADVISORY ID:
> SA21941
> 
> VERIFY ADVISORY:
> http://secunia.com/advisories/21941/
> 
> CRITICAL:
> Moderately critical
> 
> IMPACT:
> Security Bypass
> 
> WHERE:
> From remote
> 
> SOFTWARE:
> Citrix Access Gateway 4.x
> http://secunia.com/product/6168/
> 
> DESCRIPTION:
> A vulnerability has been reported in Citrix Access Gateway, which can
> be exploited by malicious people to bypass certain security
> restrictions.
> 
> The vulnerability is caused due to an error in the LDAP
> authentication. This can be exploited to bypass the authentication
> process and login without providing any user credentials.
> 
> Successful exploitation requires that the Advanced Access Control
> option is set to use LDAP authentication.
> 
> The vulnerability has been reported in Citrix Access Gateway deployed
> with Advanced Access Control 4.2. Other versions may also be affected.
> 
> SOLUTION:
> Apply hotfix AAC420W004.
> http://support.citrix.com/article/CTX110439
> 
> PROVIDED AND/OR DISCOVERED BY:
> Reported by the vendor.
> 
> ORIGINAL ADVISORY:
> http://support.citrix.com/article/CTX110950
>