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Netdata is an open source observability tool. Prior to 2.10.4, the setuid-root ndsudo helper command fail2ban-client-status-socket in src/collectors/utils/ndsudo.c accepts a caller-controlled --socket_path from the low-privileged netdata service account. The account can direct root fail2ban-client to a malicious UNIX socket, and fail2ban/client/csocket.py CSocket.receive() passes the returned data to pickle.loads(), allowing attacker-controlled code to execute as root on systems with fail2ban-client installed. This issue is fixed in version 2.10.4 and nightly build 2.10.0-782-nightly.
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1 valid exploit after Mallory filtered fakes, detection scripts, and README-only repos.
This two-file repository contains a README and a standalone Python local-privilege-escalation PoC. The script locates a setuid ndsudo binary, confirms its setuid bit, creates a malicious AF_UNIX server at /tmp/welp.sock, and invokes ndsudo's fail2ban-client-status-socket command with that socket path. When root-privileged fail2ban-client connects, the server returns a serialized malicious pickle followed by the Fail2Ban end marker. Deserialization executes a hardcoded shell command that creates a world-writable setuid-root Bash copy at /tmp/.rootsh; the script then launches that binary with -p. No external network endpoint is contacted. The claimed target is Netdata Agent before 2.10.4 with Fail2Ban installed and an attacker authorized to invoke ndsudo. The README's stated discovery date (December 31, 2026) is later than the supplied analysis date, so its historical timeline cannot be independently consistent at analysis time.
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