- Vmware horizon client log4j update#
- Vmware horizon client log4j download#
As a general practice, Rapid7 recommends never exposing VMware Horizon to the public internet, only allowing access behind a VPN.
Vmware horizon client log4j update#
Patch Immediately: Organizations that still have a vulnerable version of VMware Horizon in their environment should update to a patched version of Horizon on an emergency basis and review the system(s) for signs of compromise. We have a dedicated resource page for the Log4j vulnerability, which includes our AttackerKB analysis of Log4Shell containing a proof-of-concept exploit for VMware Horizon. Rapid7 researchers are currently evaluating the feasibility of adding a VMware Horizon vulnerability check for Nexpose/InsightVM.
On Januthis rule has been renamed "Suspicious Process - VMWare Horizon Spawns Process". Suspicious Process - VMWare Horizon Spawns CMD or PowerShell (created: Thursday, January 6, 2022, 14:18:21 UTC). Vmware horizon client log4j download#
Attacker Technique - PowerShell Download Cradles (created: Thursday, January 3, 2019, 15:31:27 UTC). Rapid7 InsightIDR and MDR customers: Alerts generated by the following detection rules can assist in identifying successful VMware Horizon exploitation: Rapid7 services and research teams expect to see a continued strong upward trend in attacker activity directed at VMware Horizon instances vulnerable to Log4Shell exploits. The activity our teams are observing is similar to observed threat activity detailed by NHS Digital. Detailsīeginning Friday, January 14, 2022, Rapid7 Managed Detection & Response (MDR) began monitoring a sudden increase in VMware Horizon exploitation. We’re sharing our observed activities and indicators of compromise (IOCs) related to this activity. We will update this blog with further information as it becomes available.Īttackers are actively targeting VMware Horizon servers vulnerable to Apache Log4j CVE-2021-44228 (Log4Shell) and related vulnerabilities that were patched in December 2021. However, on-premises components that are not managed by VMware should also be assessed and patched as soon as possible," VMware said.This post is co-authored by Charlie Stafford, Lead Security Researcher. "SaaS customers have had their cloud environments updated to resolve Log4j vulnerabilities and already received maintenance notifications through their service support channels. 19, 2021, (after the Apache Log4j maintainers updated their guidance) may already be compromised, providing directions on what to do in that case. The company warned that organizations that haven't patched or used the latest workarounds since Dec. While the message that was sent to Virtualization & Cloud Review mentioned only Horizon as a target, VMware's related guidance mentions many more products. These fixes are available in our security advisory, VMSA-2021-0028, for all internal and external Horizon components, including Horizon Connection Server, Horizon Agent, Horizon Cloud Connector, and VMware Unified Access Gateway. VMware has provided patches and workarounds that protect your environment from the industry-wide Log4j/Log4Shell exploits. 
Business disruption, ransomware, theft and extortion are possible outcomes for any unprotected environment. Your IT team should take immediate action to address this issue because unpatched Horizon environments are being actively targeted and compromised through the industry-wide Apache Log4j/Log4Shell vulnerabilities. Your company is using on-premises VMware Horizon products that are vulnerable to critical Apache Log4j/Log4Shell vulnerabilities unless properly patched or mitigated. In it's message to Horizon users, VMware said: The web shell can then be used by an attacker to carry out a number of malicious activities such as deploying additional malicious software, data exfiltration, or deployment of ransomware. Once a weakness has been identified, the attack then uses the Lightweight Directory Access Protocol (LDAP) to retrieve and execute a malicious Java class file that injects a web shell into the VM Blast Secure Gateway service. The attack likely consists of a reconnaissance phase, where the attacker uses the Java Naming and Directory InterfaceTM (JNDI) via Log4Shell payloads to call back to malicious infrastructure.
An unknown threat group has been observed targeting VMware Horizon servers running versions affected by Log4Shell vulnerabilities in order to establish persistence within affected networks.
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