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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How to find weak passwords in Active Directory and eliminate them with PowerShell

[Sponsored Post]Weak or compromised passwords are a known gateway for attackers. If you are able to identify which users in Active Directory (AD) are threatened by this, then PowerShell can help to remedy it. However, PowerShell scripts cannot eliminate basic AD deficits, other tools are needed for this. More ...

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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