Security News

Citrix and Sophos products have been impacted by leap year flaws, leading to unexpected problems in their products. Leap years solve the synchronization problem caused by the Gregorian calendar measuring a year in 365 days, while the astronomical year is 365.24 days.

Two vulnerabilities in NetScaler's ADC and Gateway products have been fixed - but not before criminals found and exploited them, according to the vendor. The flaws only affected customer-managed NetScaler ADC and NetScaler Gateway, so customers using Netscaler-managed services don't have to worry about any of this.

Today, CISA ordered U.S. federal agencies to secure their systems against three recently patched Citrix NetScaler and Google Chrome zero-days actively exploited in attacks, pushing for a Citrix RCE bug to be patched within a week. Citrix urged customers on Tuesday to immediately patch Internet-exposed Netscaler ADC and Gateway appliances against the CVE-2023-6548 code injection vulnerability and the CVE-2023-6549 buffer overflow impacting the Netscaler management interface that could be exploited for remote code execution and denial-of-service attacks, respectively.

Citrix is warning of two zero-day security vulnerabilities in NetScaler ADC (formerly Citrix ADC) and NetScaler Gateway (formerly Citrix Gateway) that are being actively exploited in the wild. The...

Citrix urged customers on Tuesday to immediately patch Netscaler ADC and Gateway appliances exposed online against two actively exploited zero-day vulnerabilities.The two zero-days impact the Netscaler management interface and expose unpatched Netscaler instances to remote code execution and denial-of-service attacks, respectively.

Telecommunications company Comcast has confirmed a breach that exposed personal information of more than 35.8 million of Xfinity customers. CVE-2023-4966 - an information disclosure vulnerability in Citrix NetScaler ADC/Gateway devices - was disclosed on October 10, when Citrix issued a patch to fix the vulnerability.

Following an investigation into the impact of the security breach, Xfinity discovered on November 16 that the attackers also exfiltrated data belonging to an undisclosed number of customers from its systems. "After additional review of the affected systems and data, Xfinity concluded on December 6, 2023, that the customer information in scope included usernames and hashed passwords; for some customers, other information may also have been included, such as names, contact information, last four digits of social security numbers, dates of birth and/or secret questions and answers. However, the data analysis is continuing," the company said.

The U.S. Department of Health and Human Services warned hospitals this week to patch the critical 'Citrix Bleed' Netscaler vulnerability actively exploited in attacks. "The Citrix Bleed vulnerability is being actively exploited, and HC3 strongly urges organizations to upgrade to prevent further damage against the Healthcare and Public Health sector. This alert contains information on attack detection and mitigation of the vulnerability," HC3 warned.

How LockBit used Citrix Bleed to breach Boeing and other targetsCVE-2023-4966, aka "Citrix Bleed", has been exploited by LockBit 3.0 affiliates to breach Boeing's parts and distribution business, and "Other trusted third parties have observed similar activity impacting their organization," cybersecurity and law enforcement officials have confirmed on Tuesday. Apache ActiveMQ bug exploited to deliver Kinsing malwareAttackers are exploiting a recently fixed vulnerability in Apache ActiveMQ to install Kinsing malware and cryptocurrency miners on targeted Linux systems.

CVE-2023-4966, aka "Citrix Bleed", has been exploited by LockBit 3.0 affiliates to breach Boeing's parts and distribution business, and "Other trusted third parties have observed similar activity impacting their organization," cybersecurity and law enforcement officials have confirmed on Tuesday. "Due to the ease of exploitation, CISA and the authoring organizations expect to see widespread exploitation of the Citrix vulnerability in unpatched software services throughout both private and public networks," the agencies warned.