31 May 2016
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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2016.1357 Login Form Hijacking Vulnerability in Citrix NetScaler Gateway 31 May 2016 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: Citrix NetScaler Gateway Publisher: Citrix Operating System: Network Appliance Virtualisation Windows Impact/Access: Cross-site Scripting -- Remote with User Interaction Resolution: Patch/Upgrade CVE Names: CVE-2016-4945 Original Bulletin: http://support.citrix.com/article/CTX213313 - --------------------------BEGIN INCLUDED TEXT-------------------- CTX213313 Login Form Hijacking Vulnerability in Citrix NetScaler Gateway Security Bulletin Medium Created: 27 May 2016 Modified: 27 May 2016 Description of Problem An attacker may hijack form values in a NetScaler Gateway login form via cookie tampering resulting in stolen user credentials. The following vulnerability has been addressed: CVE-2016-4945: Login Form Hijacking vulnerability in Citrix NetScaler Gateway These vulnerabilities affect the following versions of Citrix NetScaler Gateway: Version 11.0 earlier than 11.0 Build 66.11. Versions 10.5, 10.5.e and 10.1 are unaffected by this vulnerability. What Customers Should Do This vulnerability has been addressed in the following versions of Citrix NetScaler Gateway: Citrix NetScaler Gateway version 11.0 Build 66.11 and later These new versions can be downloaded from the following location: https://www.citrix.com/downloads/netscaler-gateway.html Citrix recommends that customers using affected versions of the NetScaler Gateway upgrade to a version of the appliance firmware that contains the fixes for these issues as soon as their normal patching schedule allows. Acknowledgements Citrix thanks Daniel Schliebner of PERSICON consultancy GmbH for working with us to protect Citrix customers. 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. Contact details for Citrix Technical Support are available at http://www.citrix.com/site/ss/supportContacts.asp. Reporting Security Vulnerabilities Citrix welcomes input regarding the security of its products and considers any and all potential vulnerabilities seriously. For guidance on how to report security-related issues to Citrix, please see the following document: CTX081743 Reporting Security Issues to Citrix Changelog Date Change May 26th 2016 Initial Publishing Applicable Products NetScaler Gateway 11.0 - --------------------------END INCLUDED TEXT-------------------- You have received this e-mail bulletin as a result of your organisation's registration with AusCERT. The mailing list you are subscribed to is maintained within your organisation, so if you do not wish to continue receiving these bulletins you should contact your local IT manager. If you do not know who that is, please send an email to email@example.com and we will forward your request to the appropriate person. NOTE: Third Party Rights This security bulletin is provided as a service to AusCERT's members. As AusCERT did not write the document quoted above, AusCERT has had no control over its content. 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Previous advisories and external security bulletins can be retrieved from: http://www.auscert.org.au/render.html?cid=1980 =========================================================================== Australian Computer Emergency Response Team The University of Queensland Brisbane Qld 4072 Internet Email: firstname.lastname@example.org Facsimile: (07) 3365 7031 Telephone: (07) 3365 4417 (International: +61 7 3365 4417) AusCERT personnel answer during Queensland business hours which are GMT+10:00 (AEST). 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