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Citrix ADC and Gateway Remote Code Execution Vulnerability (CVE-2019-19781)

Update January 17, 2020: A new detection in Qualys Web Application Scanning was added. See “Detecting with Qualys WAS” below.

Citrix released a security advisory (CVE-2019-19781) for a remote code execution vulnerability in Citrix Application Delivery Controller (ADC) and Citrix Gateway products. The vulnerability allows an unauthenticated remote attacker to execute arbitrary code on the system. Once exploited, remote attackers could obtain access to private network resources without requiring authentication.

During the week of January 13, attacks on Citrix appliances have intensified. Because of the active attacks and the ease of exploitation, organizations are advised to pay close attention.

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