Tag Archives: Citrix

Citrix Security Updates (June 2021)

Posted on 2021-06-10 by guenni

[German]A brief note for administrators who deal with Citrix products. The manufacturer has released several security bulletins including security updates for its products on June 8 and 9, 2021. There is a Citrix Hypervisor Security Update, Citrix Cloud Connector Security … Continue reading →

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Warning: DDoS attacks on Citrix NetScaler (ADC)

Posted on 2020-12-26 by guenni

[German]A brief information for Citrix NetScaler administrators. Now also CERT-Bund warns about worldwide UDP:443 (EDT) accesses to Citrix Netscaler gateways. Citrix has published a workaround. Advertising

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Cisco AnyConnect VPN 0-day exploit public available

Posted on 2020-11-05 by guenni

[German]Cisco hat vor wenigen Stunden eine Zero-Day-Schwachstelle in der Cisco AnyConnect Secure Mobility Client-Software bekannt gegeben. Zudem gibt es einen öffentlich zugänglichem Proof-of-Concept-Angriffscode, wie der Hersteller einräumte. Advertising

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Patches for Citrix security vulnerabilities (Sept. 2020)

Posted on 2020-09-30 by guenni

[German]Citrix has already issued a security bulletin regarding vulnerabilities and security updates for Citrix Application Delivery Controller, Citrix Gateway and Citrix SD-WAN WANOP appliance on September 18, 2020. Advertising

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Microsoft Defender blocks Citrix services as Trojan

Posted on 2020-08-14 by guenni

[German]Currently, there is a problem that Microsoft Defender detects Citrix services as Trojans after an update and deactivates these services. But there is a workaround, which is described in a support article. Advertising

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Vulnerabilities in Citrix ADC, Gateway & SD-Wan, patch asap

Posted on 2020-07-09 by guenni

[German]There are critical vulnerabilities in various Citrix products. The vendor has released security updates for Citrix Application Delivery Controller, Citrix Gateway and Citrix SD-WAN WANOP appliance. Administrators should urgently install the updates. Advertising

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Tip: Citrix StoreFront and SSL Certificates

Posted on 2020-02-23 by guenni

A little tip for people who work with Citrix StoreFront and want to secure the communication with the Delivery Controller via SSL certificates. Pay attention to the signature algorithm. Advertising

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Citrix ADC/Netscaler patches 11.1/12.0 released (01/19/2020)

Posted on 2020-01-20 by guenni

[German]Citrix has released first firmware updates for Citrix ADC/Netscaler 11.1/12.0 yesterday, intended to fix the CVE-2019-19781 vulnerability. Advertising

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Further actions required for Citrix Netscaler vulnerability

Posted on 2020-01-17 by guenni

[German]Another short collection for administrators who use the Citrix ADC (Application Delivery Controller, formerly Netscaler). The CVE-2019-19781 vulnerability has been exploited. In addition, other vulnerabilities and backdoors have been discovered. As there are no firmware updates available yet (coming next … Continue reading →

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PoC for Citrix ADC/Netscaler vulnerability CVE-2019-19781

Posted on 2020-01-13 by guenni

[German]There is an unpatched vulnerability CVE-2019-19781 in Citrix ADC (Application Delivery Controller, formerly Netscaler) and proof of concept (PoC) exploits have been available for a few days to exploit the vulnerability – and honeypots are already under attack. I got … Continue reading →

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