RCE in Apache Nifi Minifi C\+\+
CVE-2021-33191
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
Vulnerability class: Command Injection (OS Command Injection)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.040 (90.2th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 90th percentile — 90.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.040 · newest: 0.040 · change: 0.000
Affected products
- Apache Nifi Minifi C\+\+
- Apache Software Foundation Nifi - Minifi C++ — versions 0.5.0
Weakness classification (CWE)
References
- www.openwall.com/lists/oss-security/2021/08/24/1 (Mailing List, Third Party Advisory)
- www.openwall.com/lists/oss-security/2021/08/24/1 (mailing-list, Mailing List, Third Party Advisory)
- lists.apache.org/thread.html/r6f27a2454f5f67dbe4e21c8eb1db537b01863a0bc3758f28a… (mailing-list)
Frequently asked questions
- What is CVE-2021-33191?
- CVE-2021-33191 is a critical-severity vulnerability in Apache Nifi Minifi C\+\+, classified under OS Command Injection. CVSS score: 9.8/10. Published 2021-08-24.
- How severe is CVE-2021-33191?
- Critical severity. CVSS v3 base score is 9.8 out of 10.