CVE-2021-33191

CriticalCVSS 9.8/10Last modified Jun 17, 2026

Description

From Apache NiFi MiNiFi C++ version 0.5.0 the c2 protocol implements an "agent-update" command which was designed to patch the application binary. This "patching" command defaults to calling a trusted binary, but might be modified to an arbitrary value through a "c2-update" command. Said command is then executed using the same privileges as the application binary. This was addressed in version 0.10.0

Metrics

CVSS 3.1 9.8/10CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Weakness enumeration

CWE-78

Affected software

Vendor	Product	Versions
Apache Software Foundation	Apache NiFi - MiNiFi C++	>= 0.5.0, < Apache NiFi - MiNiFi C++*

References

http://www.openwall.com/lists/oss-security/2021/08/24/1Mailing List, Third Party Advisory
https://lists.apache.org/thread.html/r6f27a2454f5f67dbe4e21c8eb1db537b01863a0bc3758f28aa60f032%40%3Cannounce.apache.org%3E
https://www.openwall.com/lists/oss-security/2021/08/24/1Mailing List, Third Party Advisory
http://www.openwall.com/lists/oss-security/2021/08/24/1Mailing List, Third Party Advisory
https://lists.apache.org/thread.html/r6f27a2454f5f67dbe4e21c8eb1db537b01863a0bc3758f28aa60f032%40%3Cannounce.apache.org%3E
https://www.openwall.com/lists/oss-security/2021/08/24/1Mailing List, Third Party Advisory

Timeline

Published: Aug 24, 2021
Last modified: Jun 17, 2026
NVD status: Modified

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