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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2019.4302.2 Citrix ADC and Citrix Gateway Security Update (CVE-2019-0140) 23 October 2020 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: Citrix Application Delivery Controller (ADC) Citrix Gateway Publisher: Citrix Operating System: Network Appliance Impact/Access: Increased Privileges -- Existing Account Resolution: Patch/Upgrade CVE Names: CVE-2019-0140 Reference: ASB-2019.0320 Original Bulletin: https://support.citrix.com/article/CTX263807 Revision History: October 23 2020: Vendor issued updated guidance November 15 2019: Initial Release - --------------------------BEGIN INCLUDED TEXT-------------------- Citrix ADC and Citrix Gateway Security Update (CVE-2019-0140) Reference: CTX263807 Category : High Created : 12 Nov 2019 Modified : 21 Oct 2020 Applicable Products o Citrix ADC o Citrix Gateway Description of Problem A vulnerability has been identified affecting Citrix Application Delivery Controller (ADC) formerly known as NetScaler ADC, and Citrix Gateway, formerly known as NetScaler Gateway, platforms which could result in privilege escalation via layer 2 network access on all network interfaces. This vulnerability has been assigned the following CVE: o CVE-2019-0140: Buffer overflow in firmware for Intel(R) Ethernet 700 Series Controllers The following MPX/SDX series are affected: o 8900 o 14000-40G/14000-40S/14000-40C o 15000-25G/15000-50G o 25000-40G o 26000/26000-50G Only 10G/25G/40G ports are affected by this vulnerability. Mitigating Factors An attacker must have Layer 2 access to leverage this vulnerability, therefore limiting the exposure to peer switch access. This issue is mitigated if Link Layer Discovery Protocol (LLDP) is disabled at the peer switch connecting the MPX/SDX. What Customers Should Do Customers with affected versions of Citrix ADC MPX are recommended to upgrade the appliance firmware to one of the following versions: o 13.0 build 58.30 and later o 12.1 build 56.22 and later o 11.1 build 64.11 and later Customers must then upgrade the network interface card firmware by following the guidance in the following article: https://docs.citrix.com/en-us/ citrix-hardware-platforms/mpx/fortville-nic-firmware-upgrade.html . Please note that after the network interface card firmware version is upgraded on the MPX, customers can no longer downgrade the appliance firmware to anything before the aforementioned versions. Customers with affected versions of Citrix ADC SDX are recommended to upgrade the appliance firmware to a version which includes a firmware update for the vulnerable network interface card: o 13.0 build 58.30 and later o 12.1 build 57.18 and later o 11.1 build 65.10 and later Please note, that customers must first upgrade any VPX instances running on the appliance and then upgrade the SVM. More details are available in the following article: https://docs.citrix.com/en-us/citrix-hardware-platforms/sdx/ fortville-nic-firmware-upgrade-on-sdx.html . Alternatively, customers who are unable to upgrade are strongly recommended to Disable Link Layer Discovery Protocol (LLDP) at the peer switch connecting the MPX or SDX. Changelog +--------------------------+--------------------------------------------------+ |Date |Change | +--------------------------+--------------------------------------------------+ |2019-11-12 |Initial Publication | +--------------------------+--------------------------------------------------+ |2020-10-21 |Updated guidance | +--------------------------+--------------------------------------------------+ - --------------------------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. 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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 iQIVAwUBX5JSqONLKJtyKPYoAQjWpBAApfQ2FPpdec/Ybid7v5Ftg7eh7ESDXtY0 jlLiFbBtTOtC420cQ/4zd9rOJnapkWPNH2O9mwNr7Wxc1Um08TWwO1TZTmmYAEqJ D2xLhJkeUVLSdSGorALDtxY1I4Bco3SNmjJ1tieE6PzSiMKkHFuvkjs2Tfh0hFIX 9DX7+dwemhVPKFveGyP175jhFigRWc6v1WRHuIaAbGQL1K8ukooZ47TPQQHLMqgT ep2BJFOvwinUp4FqiCn9BpE+549uQ9HD7NDhxQpNXAZJaf06cvW39zTjFC47MZQB 14y4iFykAo/5+TXEM8ImK5GrVoJL87VAXwhXAJsbj/9Ywe283WNtfwtAFdRsZhx3 T67XV/2fnzWnl28t8QYhid50r80eDNAZWk61hVygpkgHCexyGMaq4Y/303w+FcwJ pJh2Y6Hf21Ug1y72HjY7ciYz3LaPnJUmx+IT/iSm1CiexVYWiEKNBcb+W8iBvfRv smZtvbtYAC2YdZeFfa91F8NaqZ9wNW+QqRoHTSApAYwrhd2K0D6LwcJiIgisc2rv 07xzsXkXdHKiasSOdSgq7jZZZUN0UZaq2KgWr+fxQtTFSNABYgnZIqbUVFDT/Yjb +n4inWhnPjBhyP0m4rScuFwma2koUGQjcVRiOqF9woC3812lJLthL5DJa3UMdV0Q Dpi/Y2uELok= =jocQ -----END PGP SIGNATURE-----