07/02/2020
Citrix first disclosed this vulnerability in an Advisory on 17 December 2019. Initially, no patch was available although Citrix provided mitigation advice. On 19 January 2020, Citrix began to release fixes, which were available for all affected builds by 24 January. Links can be found below.
The NCSC recommends the following vendor best practice advice to mitigate vulnerabilities. In this case, the most important aspect is to install the latest updates as soon as practicable and to follow the vendor mitigation advice immediately.
Citrix have now updated the fixes for all affected ADC versions:
https://www.citrix.com/downloads/citrix-adc/
Fixes for all affected Gateway versions:
https://www.citrix.com/downloads/citrix-gateway/
Fixes for all affected SD-WAN models:
https://www.citrix.com/downloads/citrix-sd-wan/
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