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THE THREAT On August 21st, 2023, Ivanti disclosed a new vulnerability impacting Ivanti Sentry (formerly MobileIron Sentry). Ivanti has confirmed limited exploitation occurred prior to the disclosure… READ NOW
Our Threat Response Unit (TRU) publishes security advisories, blogs, reports, industry publications and webinars based on its original research and the insights driven through proactive threat hunts.
eSentire is The Authority in Managed Detection and Response Services, protecting the critical data and applications of 2000+ organizations in 80+ countries from known and unknown cyber threats. Founded in 2001, the company's mission is to hunt, investigate and stop cyber threats before they become business disrupting events.
Waterloo, ON–September 6, 2023 – eSentire, Inc., the Authority in Managed Detection and Response (MDR), and Kterio, the leading provider of smart building operating systems, today announced that they… READ NOW
We provide sophisticated cybersecurity solutions for Managed Security Service Providers (MSSPs), Managed Service Providers (MSPs), and Value-Added Resellers (VARs). Find out why you should partner with eSentire, the Authority in Managed Detection and Response, today.
We believe a multi-signal approach is paramount to protecting your complete attack surface. See why eSentire MDR means multi-signal telemetry and complete response.
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On July 18, 2023, Citrix disclosed three vulnerabilities impacting NetScaler ADC (formerly Citrix ADC) and NetScaler Gateway (formerly Citrix Gateway), one of which is confirmed to be exploited in the wild, prior to the release of security patches. The zero-day vulnerability, tracked as CVE-2023-3519 (CVSS: 9.8), may be exploited by a remote and unauthenticated threat actor to achieve code execution. Citrix has not released any details relating to the current exploitation activity targeting NetScaler ADC and Gateway.
As exploitation has been confirmed in the wild, eSentire strongly encourages organizations using Citrix products to update to the most current version as soon as possible.
While details surrounding CVE-2023-3519 are still minimal, it should be noted, that for successful exploitation of the vulnerability, a vulnerable device must be configured as a Gateway or AAA virtual server. Citrix servers are not configured as Gateways or AAA virtual servers by default. The eSentire Threat Intelligence team will continue to track this vulnerability going forward.
The two other vulnerabilities, disclosed by Citrix in this release, are rated as high severity but have not been exploited in real-world attacks at this time.
Impacted Citrix Products:
NetScaler Gateway and NetScaler ADC version 12.1 is out of support and will not receive any additional updates. Organizations using version 12.1 are strongly recommended to update to a supported version as soon as possible.