anti
f2b3393669
Replaces LICENSE (GPLv3 -> AGPLv3) and prepends `SPDX-License-Identifier: AGPL-3.0-or-later` to every source file across decnet/, decnet_web/, tests/, scripts/, and tools/. Rationale: closes the GPLv3 ASP loophole so any party operating a modified DECNET as a network service must offer their modified source. Personal copyright (Samuel Paschuan) + inbound=outbound contributions make a future unilateral relicense infeasible. - LICENSE: full AGPL-3.0 text (gnu.org/licenses/agpl-3.0.txt) - COPYRIGHT: project copyright notice - tools/add_spdx_headers.py: idempotent header injector (shebang- and PEP 263-aware) Touches 1565 source files (.py, .ts, .tsx, .js, .jsx, .css, .sh). No behavior change; comments only.
118 lines
4.5 KiB
Python
118 lines
4.5 KiB
Python
# SPDX-License-Identifier: AGPL-3.0-or-later
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import os
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from pathlib import Path
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from decnet.services.base import BaseService, ServiceConfigField
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TEMPLATES_DIR = Path(__file__).parent.parent / "templates" / "telnet"
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ARTIFACTS_ROOT = os.environ.get("DECNET_ARTIFACTS_ROOT", "/var/lib/decnet/artifacts")
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class TelnetService(BaseService):
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"""
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Real telnetd using busybox telnetd + rsyslog logging pipeline.
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Replaced Cowrie emulation (which also started an SSH daemon on port 22)
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with a real busybox telnetd so only port 23 is exposed and auth events
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are logged as RFC 5424 via the same rsyslog bridge used by the SSH service.
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service_cfg keys:
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password Root password (default: "admin")
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user Non-root user name (default: "ubuntu") for
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realistic "telnet user@host" lures + privesc capture
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user_password Non-root user's password (default: "admin")
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hostname Override container hostname
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"""
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name = "telnet"
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ports = [23]
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default_image = "build"
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config_schema = [
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ServiceConfigField(
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key="password",
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label="Root password",
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type="password",
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default="admin",
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secret=True,
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help="Plaintext root password for the in-container telnetd.",
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),
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ServiceConfigField(
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key="user",
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label="Non-root user",
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type="string",
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default="ubuntu",
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help=(
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"Username for the second account on the decoy. The telnet "
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"image is busybox + real /bin/login (PAM-aware), so a "
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"non-root user widens the attack surface — captures "
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"enumeration scripts that only try common usernames "
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"(`telnet ubuntu@host`) and post-login `su -` privesc "
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"attempts via the existing PAM auth-helper."
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),
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),
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ServiceConfigField(
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key="user_password",
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label="Non-root user password",
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type="password",
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default="admin",
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secret=True,
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help=(
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"Password for the non-root user. Captured at PAM auth "
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"time via the same auth-helper that handles root logins. "
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"Telnet has no sudo (busybox+login image); privesc rides "
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"`su -` which itself flows through PAM."
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),
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),
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ServiceConfigField(
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key="hostname",
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label="Container hostname",
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type="string",
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placeholder="e.g. mail-01.corp.local",
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help=(
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"Cosmetic override for the telnet banner — keeps decoys "
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"looking heterogeneous. Decky identity (NODE_NAME) is unaffected."
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),
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),
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]
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def compose_fragment(
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self,
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decky_name: str,
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log_target: str | None = None,
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service_cfg: dict | None = None,
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) -> dict:
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cfg = service_cfg or {}
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env: dict = {
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"TELNET_ROOT_PASSWORD": cfg.get("password", "admin"),
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# Non-root user account — created at runtime by the
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# entrypoint iff TELNET_USER is non-empty. Defaults to
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# "ubuntu"/"admin" to mirror the SSH service shape and
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# match the Ubuntu-flavoured motd already baked into the
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# telnet image.
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"TELNET_USER": cfg.get("user", "ubuntu"),
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"TELNET_USER_PASSWORD": cfg.get("user_password", "admin"),
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# NODE_NAME is the authoritative decky identifier for log
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# attribution — matches the host path used for the artifacts
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# bind mount below.
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"NODE_NAME": decky_name,
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}
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if "hostname" in cfg:
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env["TELNET_HOSTNAME"] = cfg["hostname"]
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# Quarantine mount symmetric to the SSH service — sessrec appends
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# pty transcripts to /var/lib/systemd/coredump/transcripts/ inside
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# the container, which the host sees under artifacts/<decky>/telnet/.
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quarantine_host = f"{ARTIFACTS_ROOT}/{decky_name}/telnet"
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return {
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"build": {"context": str(TEMPLATES_DIR)},
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"container_name": f"{decky_name}-telnet",
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"restart": "unless-stopped",
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"cap_add": ["NET_BIND_SERVICE"],
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"environment": env,
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"volumes": [f"{quarantine_host}:/var/lib/systemd/coredump:rw"],
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}
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def dockerfile_context(self) -> Path:
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return TEMPLATES_DIR
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