Citrix has released patches for Citrix Hypervisor that address two vulnerabilities. If exploited, an attacker could exploit privileged code in a guest VM and cause the host to crash or become unresponsive.
Advanced persistent threat actors (APTs) are exploiting multiple legacy vulnerabilities in combination with newer "Zerologon" to target government networks, critical infrastructure, and elections organizations.
Chinese Ministry of State Security (MSS)-affiliated cyber threat actors are targeting U.S. government agencies, as well as exploiting four popular vulnerabilities over the past 12 months.
U.S. government cybersecurity experts are providing guidance on the "top 10" most commonly exploited vulnerabilites. The alert helps highlight the importance of patching and prioritizing vulnerabilities with known exploits.
Researchers from FireEye have discovered Chinese cyber threat group APT41 carry out a broad cyber campaign between January 20 and March 11, 2020. The actors have attempted to exploit vulnerabilities in Citrix NetScaler/ADC, Cisco routers, and Zoho ManageEngine Desktop Central products against 75 FireEye customers.
Citrix has made available a new permanent fix for a critical vulnerability CVE-2019-19781 in affected versions of Citrix SD-WAN WANOP. The update comes nearly five days after Citrix provided firmware updates for the same vulnerability in Application Delivery Controller (ADC) and Citrix Gateway products. An unathenticated attacker could exploit the vulnerability and execute arbitrary code.
Security researchers have discovered critical vulnerabilities in Citrix SD-WAN appliance. Hackers could remotely exploit the vulnerabilities without authentication and gain root access.
Citrix warned it was a victim of a cyberattack whereby hackers gained unauthorized access to large amounts of internal data. The company is actively cooperating with the FBI and have launched a forensics investigation into the breach.
Citrix has released patches for Citrix XenServer that address several vulnerabilities. If exploited, an attacker or malicious administrator of a guest VM could crash or compromise certain XenServer hosts.