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Malicious actors recently exploited a Citrix vulnerability to steal active directory data from a critical infrastructure organization, the Cybersecurity and Infrastructure Security Agency reported recently, urging organizations to take certain steps to detect a potential system compromise and apply patches.

“This serious vulnerability in the very commonly used Citrix/Netscaler Application Delivery Controller was unknown prior to exploitation,” said John Riggi, AHA’s national advisor for cybersecurity and risk. “According to security researchers, the vulnerability may be associated with a Chinese government espionage campaign targeting critical infrastructure and allows hackers to access key network resources, such as active directory, and remotely execute malicious code. It is recommended that organizations using this service upgrade to the latest version of Netscaler ADC and Netscaler Gateway and patch according to bulletin CVE-2023-3467. The implementation of phishing-resistant multi-factor authentication also is highly recommended as a baseline security practice to help mitigate the risk of this and all other cyberattacks.”

For more information on this or other cyber and risk issues, contact Riggi at . For the latest cyber and risk resources and threat intelligence, visit aha.org/cybersecurity.