CVE-2019-11286
📋 TL;DR
This vulnerability allows remote authenticated attackers to execute arbitrary code on affected VMware GemFire systems by exploiting improper input validation in the JMX service. It affects VMware GemFire and Tanzu GemFire for VMs installations with vulnerable versions exposed to the network. Attackers need valid credentials but can achieve full system compromise.
💻 Affected Systems
- VMware GemFire
- VMware Tanzu GemFire for VMs
📦 What is this software?
Gemfire by Vmware
Gemfire by Vmware
Gemfire by Vmware
Tanzu Gemfire For Virtual Machines by Vmware
View all CVEs affecting Tanzu Gemfire For Virtual Machines →
⚠️ Risk & Real-World Impact
Worst Case
Complete system takeover with attacker gaining full control over the GemFire server, potentially leading to data theft, system destruction, or lateral movement within the network.
Likely Case
Remote code execution leading to data exfiltration, installation of backdoors, or cryptocurrency mining malware deployment.
If Mitigated
Limited impact if proper network segmentation and authentication controls prevent unauthorized access to the JMX service.
🎯 Exploit Status
Exploitation requires authentication but uses crafted credentials to bypass input validation. No public exploit code was available at disclosure.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: GemFire: 9.10.0, 9.9.1, 9.8.5, 9.7.5 or later; Tanzu GemFire for VMs: 1.11.0, 1.10.1, 1.9.2, 1.8.2 or later
Vendor Advisory: https://tanzu.vmware.com/security/cve-2019-11286
Restart Required: Yes
Instructions:
1. Download the patched version from VMware support portal. 2. Backup configuration and data. 3. Stop GemFire services. 4. Install the update. 5. Restart services. 6. Verify functionality.
🔧 Temporary Workarounds
Disable JMX network access
allConfigure JMX service to listen only on localhost or disable remote JMX access entirely
Modify gemfire.properties: jmx-manager-hostname-for-clients=localhost
Set jmx-manager-port=0 to disable JMX manager
Restrict network access
linuxUse firewall rules to limit access to JMX ports (default 1099) to trusted IPs only
iptables -A INPUT -p tcp --dport 1099 -s trusted_ip -j ACCEPT
iptables -A INPUT -p tcp --dport 1099 -j DROP
🧯 If You Can't Patch
- Implement strict network segmentation to isolate GemFire servers from untrusted networks
- Enforce strong authentication mechanisms and regularly rotate credentials
🔍 How to Verify
Check if Vulnerable:
Check GemFire version using 'gfsh version' command and compare against affected versionsCheck Version:
gfsh versionVerify Fix Applied:
Verify installed version is equal to or higher than patched versions listed in advisory📡 Detection & Monitoring
Log Indicators:
- Unusual JMX authentication attempts
- Failed authentication with crafted credentials
- Unexpected process execution from JMX service
Network Indicators:
- Unusual connections to JMX port (default 1099) from unauthorized sources
- Suspicious JMX protocol traffic patterns
SIEM Query:
source="gemfire.log" AND ("JMX" OR "authentication") AND ("failed" OR "unusual")