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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2020.0103.2 CVE-2020-6175 - Citrix SD-WAN Security Update 13 January 2020 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: Citrix SD-WAN Appliance Publisher: Citrix Operating System: Network Appliance Impact/Access: Provide Misleading Information -- Remote/Unauthenticated Access Confidential Data -- Remote/Unauthenticated Resolution: Patch/Upgrade CVE Names: CVE-2020-6175 Reference: ESB-2020.0103 Original Bulletin: https://support.citrix.com/article/CTX263526 Revision History: January 10 2020: Updated URL January 09 2020: Initial Release - --------------------------BEGIN INCLUDED TEXT-------------------- CVE-2020-6175 - Citrix SD-WAN Security Update Reference: CTX263526 Category : High Created : 09 Jan 2020 Modified : 10 Jan 2020 Applicable Products o Citrix SD-WAN o Citrix SD-WAN 10.1 o NetScaler SD-WAN 10.0 Description of Problem An information disclosure vulnerability has been identified in the Citrix SD-WAN Appliance. This vulnerability could allow an unauthenticated attacker to perform a man-in-the-middle attack against management traffic. The vulnerability has been assigned the following CVE number. CVE-2020-6175- Information Disclosure in Citrix SD-WAN Appliance 10.2.x before 10.2.6 and 11.0.x before 11.0.3 Affected Versions: o All versions of NetScaler SD-WAN 10.0.x and earlier * o All versions of Citrix SD-WAN 10.1.x * o All versions of Citrix SD-WAN 10.2.x earlier than 10.2.6 o All versions of Citrix SD-WAN 11.0.x earlier than 11.0.3 * Upgrade to 10.2.6, 11.0.3, or newer for security update Mitigating Factors In order to protect against these vulnerabilities and web application related issues, Citrix recommends access to the management interface be restricted. In situations where customers have deployed their appliances in line with industry best practice, network access to this interface should already be restricted and default system certificates should be replaced by certificates from a reputable Certificate Authority. Security Best Practices: 10.2.x - https://docs.citrix.com/en-us/citrix-sd-wan/10-2/best-practices/ security-best-practices.html 11.x - https://docs.citrix.com/en-us/citrix-sd-wan/11/best-practices/ security-best-practices.html What Customers Should Do This vulnerability has been addressed in the following software versions: o Citrix SD-WAN 10.2.6 o Citrix SD-WAN 11.0.3 Citrix strongly recommends that customers using vulnerable combinations of hardware and software upgrade their appliances to a fixed version or later as soon as possible. Citrix also recommends that customers either: replace default system certificates by uploading and installing certificates from a reputable Certificate Authority, or regenerate their self-signed certificate. The functionality for both actions can be accessed at: Configuration> Appliance Settings> Administrator Interface> HTTPS Certs in the SD-WAN appliance GUI as described in the Best Practices Guide under section "Secure administrator interface". The new software versions will be available on the Citrix website. Information on the available versions can be found at the following location: https://www.citrix.com/downloads/netscaler-sd-wan/ In line with general best practice, Citrix also recommends that customers limit access to the management console of the Citrix SD-WAN Appliance to trusted network traffic only. Changelog +-----------------------------------+-----------------------------------------+ |Date |Change | +-----------------------------------+-----------------------------------------+ |9th January 2020 |Initial Publication | +-----------------------------------+-----------------------------------------+ - --------------------------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. 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