Cyrene
ae50acfe40
Passwords failed on 10/16 challenges while state.json looked correct:
- only the 6 native GEMASTIK XVIII images provision 'ctfuser'; every imported
XVI/XVII image does 'echo root:${PASSWORD} | chpasswd' and logs in as root.
set_ssh_passwords() hardcoded ctfuser, so chpasswd set a password on an
account nobody uses -> 'Permission denied' everywhere.
Registry gains a per-challenge 'ssh_user'; chpasswd now targets the real
login (and ctfuser/ctf when present) and reports failures loudly.
- phew checker: chall.py block-buffers stdout through the docker exec pipe
(PYTHONUNBUFFERED now set) and leaks chall.py inside the container on
timeout (26 orphans, container saturated) -> reaps the whole exec process
group. Startup does a fresh Pailier keygen (~12 s) so crypto reads need
_CRYPTO_TIMEOUT, not the 5 s prompt default.
Adds panel/verify_ssh_creds.py (proves the state->container binding from
inside via a real login), audit_ssh_users.sh, reset_runtime.sh.
68 lines
2.6 KiB
Python
68 lines
2.6 KiB
Python
from .Challenge import Challenge
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import requests
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import zlib
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import gzip
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import json
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MOCK_URL = 'http://google.com'
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MOCK_DATA_WGET = 'Google</title>'
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MOCK_DATA_CURL = '<HTML><HEAD><meta http-equiv="content-type" content="text/html;charset=utf-8">'
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class GemasFetcher(Challenge):
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flag_location = 'flags/gemas-fetcher.txt'
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history_location = 'history/gemas-fetcher.txt'
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def distribute(self, flag):
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try:
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with open(self.flag_location, 'w') as f:
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f.write(flag)
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with open(self.history_location, 'a') as f:
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f.write(flag + '\n')
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self.logger.info(f'Flag {flag} written to {self.flag_location}')
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return True
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except Exception as e:
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self.logger.error(f'Could not write flag to {self.flag_location}: {e}')
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return False
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def check(self):
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try:
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sess = requests.Session()
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## register
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username = self.random_string(5)
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password = self.random_string(5)
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r = sess.post(self.url(f'/auth/register'), data={"username":username,"password": password}, allow_redirects=False)
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assert r.headers.get("location") == "/auth/login", "Register Failed"
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## login
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r = sess.post(self.url(f'/auth/login'), data={"username":username,"password": password}, allow_redirects=False)
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assert r.headers.get("location") == "/dashboard", "Login Failed"
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## wget
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content = {"provider": "wget","url":MOCK_URL}
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files = {"file": ("visit", b"\x00\x00"+gzip.compress(zlib.compress(json.dumps(content).encode())))}
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r = sess.post(self.url(f'/dashboard/fetch_by_file'), files=files)
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assert MOCK_DATA_WGET in r.text, "wget Failed"
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## curl
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content = {"provider": "curl","url":MOCK_URL}
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files = {"file": ("visit", b"\x00\x01"+gzip.compress(zlib.compress(json.dumps(content).encode())))}
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r = sess.post(self.url(f'/dashboard/fetch_by_file'), files=files)
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assert r.text.split('\n').pop(0) == MOCK_DATA_CURL, "curl Failed"
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## python
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content = {"provider": "python","url":MOCK_URL}
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files = {"file": ("visit", b"\x00\x02"+gzip.compress(zlib.compress(json.dumps(content).encode())))}
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r = sess.post(self.url(f'/dashboard/fetch_by_file'), files=files)
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assert r.text.startswith('"PCFkb2N0eXBlIGh0bWw'), "python Failed"
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return True
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except Exception as e:
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self.logger.error(f'Could not check gemas-fetcher: {e}')
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return False
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