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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2018.0612 Security vulnerabilities patched in Citrix NetScaler products 2 March 2018 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: Citrix NetScaler ADC Citrix NetScaler Gateway Publisher: Citrix Operating System: Network Appliance Impact/Access: Root Compromise -- Existing Account Cross-site Scripting -- Remote with User Interaction Access Confidential Data -- Remote/Unauthenticated Resolution: Patch/Upgrade CVE Names: CVE-2018-6811 CVE-2018-6810 CVE-2018-6809 CVE-2018-6808 CVE-2018-6186 Original Bulletin: https://support.citrix.com/article/CTX232161 - --------------------------BEGIN INCLUDED TEXT-------------------- CTX232161 Citrix NetScaler Application Delivery Controller and NetScaler Gateway Multiple Security Updates Applicable Products * NetScaler 12.0 * NetScaler 11.1 * NetScaler 11.0 * NetScaler 10.5 * NetScaler Gateway 12.0 * NetScaler Gateway 11.1 * NetScaler Gateway 11.0 * NetScaler Gateway 10.5 Description of Problem A number of vulnerabilities have been identified in supported versions of Citrix NetScaler Application Delivery Controller (ADC) and NetScaler Gateway. The following vulnerabilities have been addressed: * CVE-2018-6810: Citrix NetScaler Application Delivery Controller (ADC) and NetScaler Gateway Directory Traversal Vulnerability * CVE-2018-6808: Citrix NetScaler Application Delivery Controller (ADC) and NetScaler Gateway Arbitrary File Download Vulnerability * CVE-2018-6809: Citrix NetScaler Application Delivery Controller (ADC) and NetScaler Gateway Privilege Escalation Vulnerability * CVE-2018-6811: Multiple Cross-Site Scripting vulnerabilities in Citrix NetScaler Application Delivery Controller (ADC) and NetScaler Gateway * CVE-2018-6186: Citrix NetScaler VPX through NS12.0 53.13.nc allows an SSRF attack via the /rapi/read_url URI by an authenticated attacker who has a webapp account. The attacker can gain access to the nsroot account, and execute remote commands with root privileges. The vulnerabilities affect the following versions of Citrix NetScaler ADC and NetScaler Gateway: * Citrix NetScaler ADC and NetScaler Gateway earlier than version 12.0 Build 57.19 * Citrix NetScaler ADC and NetScaler Gateway earlier than version 11.1 Build 56.15 * Citrix NetScaler ADC and NetScaler Gateway earlier than version 11.0 Build 71.18 * Citrix NetScaler ADC and NetScaler Gateway earlier than version 10.5 Build 67.10 - ------------------------------------------------------------------------------- What Customers Should Do These vulnerabilities have been addressed in the following versions of Citrix NetScaler ADC and NetScaler Gateway: * Citrix NetScaler ADC and NetScaler Gateway version 12.0 Build 57.19 and later * Citrix NetScaler ADC and NetScaler Gateway version 11.1 Build 56.15 and later * Citrix NetScaler ADC and NetScaler Gateway version 11.0 Build 71.18 and later * Citrix NetScaler ADC and NetScaler Gateway version 10.5 Build 67.10 and later Citrix recommends that affected customers upgrade their NetScaler appliances to a version of the appliance firmware that contains a fix for these issues as soon as their patching schedule allows. These versions are available on the Citrix website at the following addresses: https://www.citrix.com/downloads/netscaler-adc/ https://www.citrix.com/downloads/netscaler-gateway/ - ------------------------------------------------------------------------------- Acknowledgements Citrix thanks the Qualys Security Research Team (https://www.qualys.com) 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 https://www.citrix.com/support/open-a-support-case.html. - ------------------------------------------------------------------------------- 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 | |----------------------------------+------------------------------------------| |1st March 2018 |Initial publishing | +-----------------------------------------------------------------------------+ - --------------------------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 auscert@auscert.org.au 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. The decision to follow or act on information or advice contained in this security bulletin is the responsibility of each user or organisation, and should be considered in accordance with your organisation's site policies and procedures. AusCERT takes no responsibility for consequences which may arise from following or acting on information or advice contained in this security bulletin. NOTE: This is only the original release of the security bulletin. It may not be updated when updates to the original are made. If downloading at a later date, it is recommended that the bulletin is retrieved directly from the author's website to ensure that the information is still current. Contact information for the authors of the original document is included in the Security Bulletin above. If you have any questions or need further information, please contact them directly. Previous advisories and external security bulletins can be retrieved from: https://www.auscert.org.au/bulletins/ =========================================================================== Australian Computer Emergency Response Team The University of Queensland Brisbane Qld 4072 Internet Email: auscert@auscert.org.au 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). On call after hours for member emergencies only. =========================================================================== -----BEGIN PGP SIGNATURE----- Comment: http://www.auscert.org.au/render.html?it=1967 iQIVAwUBWpi6rYx+lLeg9Ub1AQgI4g//fMt9T2jymINnLYYb7VXe71C8F73ow7wT ntFrBhG3vv580QTjNBD343Va/R8hnya6gWM1rtxAokVnKx2Eyb719wz+AOJogJIN 9gmtOKWuLB52+AFJENG23agnU9gkvMzkhqjzrrZ7iqZzXZPkFBL6FvMVRb3t7kZE 1JjjSTchexI6/L5xUbynF72XY/B7V1ljBEZgwGwjttUG1slLX3MXm3MPL/Tu/Spu RgeoGOBHbVPsjMQQu+P3fICpovx0DYB6MBKA+nF8gvHrYQfRi3UweIDt/FYPxRje wubbQZluyslAfcI/Eeq5mjRof/Sy0xzMW8joiIp9t4it1CqEG6C0W9vzRorXrGdE 4y4uSTeqICF0EvxJuIXv2uvnbwevFL34Dmj1zcUy6KxVAr9qsk4DDm+nrQLw5vdW /AOPh8vB559jjPaP8Af6UsbRVbDB8McB6AHVJQeqpcUISrGcUX/6yIJP5yDaxg94 1FZcNClf+KHjUAQYTyrLxEpFMq87HQuAv2m6czLOxncsCex+zFB8EE1EonT/a6WO EiLz95aUg+hMPhb5wb5iJGDnh4W3TUZBFFiONVk8asQ4C8M2tdJzIqvg4gCVwzlV WMcUQmu6UoDvipE7hHxcqcCSW85gdHApD0HCehhehqE0LJqlGvV15Nm87STO9JdI 6H4NeeKeqDI= =FLzC -----END PGP SIGNATURE-----