What’s Vulnerable › Vulnerabilities

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

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 83.8% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2021-10-25 · updated 2026-06-17
• Weakness: CWE-74

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.

Affected products

• Apache Software Foundation Apache Storm: from 1.0.0 before 1.2.4; from 2.1.0 before 2.1.1; from 2.2.0 before 2.2.1 — fixed in 1.2.4, 2.1.1, 2.2.1

How to fix

Upgrade to a fixed version: Apache Software Foundation Apache Storm 1.2.4, 2.1.1, 2.2.1. Check the vendor advisory for mitigations.

References

• http://packetstormsecurity.com/files/165019/Apache-Storm-Nimbus-2.2.0-Command-Execution.html
• 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://lists.apache.org/thread.html/r5fe881f6ca883908b7a0f005d35115af49f43beea7a8b0915e377859%40%3Cuser.storm.apache.org%3E
• https://seclists.org/oss-sec/2021/q4/44

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