NICER Protocol Deep Dive: Internet Exposure of Citrix ADC/NetScaler

Welcome to the NICER Protocol Deep Dive blog series! When we started researching what all was out on the internet way back in January, we had no idea we'd end up with a hefty, 137-page tome of a research report. The sheer length of such a thing might put off folks who might otherwise learn a thin...

Debian DLA-2423-1 : wireshark security update

Several vulnerabilities were fixed in the Wireshark network protocol analyzer. CVE-2019-10894 GSS-API dissector crash CVE-2019-10895 NetScaler file parser crash CVE-2019-10896 DOF dissector crash CVE-2019-10899 SRVLOC dissector crash CVE-2019-10901 LDSS dissector crash CVE-2019-10903 DCERPC SPOOL...

Time Display on NetScaler Does Not Sync Using NTP

Time display on NetScaler does not sync using NTP...

How to Create Custom Theme for Logon Page of NetScaler Gateway 10.1 and 10.5

This article describes how to create custom theme for logon page of NetScaler Gateway virtual server...

FAQ: Citrix Secure Hub for Mobile Devices and MicroVPN Technology

Citrix Endpoint Management, using technology formerly called XenMobile This article contains frequently asked questions about MicroVPN with XenMobile App or Enterprise editions and NetScaler Gateway deployments. Q: What are the recommended versions of components for MicroVPN? Q: What is MicroVPN?...

General Information on NetScaler SDX LOM

This article provides general information on Lights Out Management LOM on the NetScaler SDX appliance and also about how to configure the NetScaler SDX appliance, initial settings and commands to troubleshoot. Background All NetScaler SDX devices are shipped with a LOM. The LOM has a separate CPU...

Radius Challenge Response Timeout Between NetScaler Gateway and Radius Server

When using two-factor challenge/response authentication through RADIUS, the NetScaler Gateway imposes a session timeout for the RADIUS challenge/response dialogue. In case of SMS token code delivery, there might be long delays between the challenge displayed to the user and the actual submission ...

NetScaler Appliance System Limits

This article contains information about various system limits for a NetScaler appliance with NetScaler software release 13.1 installed on the appliance. LSN Entities and Bindings Base System Limits Base Networking Limits Load Balancing and Monitoring Limits Advanced Policy/Expression Limits Rewri...

How to create message action to log to syslog in Citrix NetScaler

This article describes how to create a message action that can be bound to a responder or rewrite policy that logs to syslog in NetScaler...

Traffic Management Logout Functionality on NetScaler

This article covers the Traffic Management TM logout functionality on NetScaler which is added in 10.0 and 9.3.e releases. The TM logout functionality triggers AAA session logout on traffic action hit. NetScaler can be configured for "Initiate Logout" option in the TM traffic profile. The followi...

Election Systems Under Attack via Microsoft Zerologon Exploits

U.S. government officials have warned that advanced persistent threat actors APTs are now leveraging Microsoft’s severe privilege-escalation flaw, dubbed “Zerologon,” to target elections support systems. Days after Microsoft sounded the alarm that an Iranian nation-state actor was actively...

Customize Logon Page for Each NetScaler Gateway Virtual Server and Redirect Users Based on Each FQDN

This article helps you customize a different logon page for each VPN virtual server hosted on NetScaler Gateway, and configure the NetScaler appliance to redirect users to the customized page based on the FQDN. Prerequisites The NetScaler Gateway must be licensed for the Responder feature to...

Error: "Socket Operation on Non-Socket" and "Error 1030" When Launching Apps and Desktop Through NetScaler Gateway

1030 error when launching apps and desktop through NetScaler Gateway. Error "Unable to launch your application. Contact your help desk with the following information: Cannot connect to the Citrix XenApp server. Socket operation on non-socket" when launching apps through NetScaler Gateway...

How to Configure RDP Profile on NetScaler Gateway

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Error: "Login exceeds maximum allowed users" on NetScaler Gateway

Users get the following error message when they try to log on through NetScaler Gateway: "Login exceeds maximum allowed users". Usually this issue appears after a firmware upgrade from NetScaler Gateway 9.x to NetScaler Gateway 10.5 and Universal Gateway License is allocated...

How to Configure an NTP Server on a NetScaler Appliance

This article contains information about configuring a Network Time Protocol NTP server on a NetScaler appliance. Background In the earlier releases of the NetScaler software, you need to manually edit multiple files from the shell prompt of the NetScaler appliance to configure an NTP server. The...

The SNI Feature of NetScaler Appliance

This article contains information about Server Name Identification SNI feature of the NetScaler appliance. Background The SNI feature is included starting with the NetScaler software release 9.2. Note : The SNI feature is not supported on the back end connections. For information on how to...

CVE-2020-25143

An issue was discovered in Observium Professional, Enterprise & Community 20.8.10631. It is vulnerable to SQL Injection due to the fact that it is possible to inject malicious SQL statements in malformed parameter types. This can occur via /ajax/deviceentities.php?entitytype=netscalervsvr&devicei...

Citrix ADC and Citrix NetScaler Gateway Multiple Vulnerabilities (CTX281474)

The remote Citrix ADC or Citrix NetScaler Gateway device is version 11.1.x prior to 11.1-65.12, 12.1.x prior to 12.1-58.15 or 12.1-FIPS prior to 12.1-55.187 13.0.x prior to 13.0-64.35. It is, therefore, affected by multiple vulnerabilities: - A HTML injection vulnerability exists in Citrix ADC du...

Denial Of Service (DoS)

wireshark is vulnerable to denial of service DoS. The vulnerability exists as the NetScaler file parser could crash through poor data validation in wiretap/netscaler.c...