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"""
Test that CVEs stay fixed.
"""
from IPython.utils.tempdir import TemporaryDirectory, TemporaryWorkingDirectory
from pathlib import Path
import random
import sys
import os
import string
import subprocess
def test_cve_2022_21699():
"""
Here we test CVE-2022-21699.
We create a temporary directory, cd into it.
Make a profile file that should not be executed and start IPython in a subprocess,
checking for the value.
"""
dangerous_profile_dir = Path("profile_default")
dangerous_startup_dir = dangerous_profile_dir / "startup"
dangerous_expected = "CVE-2022-21699-" + "".join(
[random.choice(string.ascii_letters) for i in range(10)]
)
with TemporaryWorkingDirectory() as t:
dangerous_startup_dir.mkdir(parents=True)
(dangerous_startup_dir / "foo.py").write_text(
f'print("{dangerous_expected}")', encoding="utf-8"
)
# 1 sec to make sure FS is flushed.
# time.sleep(1)
cmd = [sys.executable, "-m", "IPython"]
env = os.environ.copy()
env["IPY_TEST_SIMPLE_PROMPT"] = "1"
# First we fake old behavior, making sure the profile is/was actually dangerous
p_dangerous = subprocess.Popen(
cmd + [f"--profile-dir={dangerous_profile_dir}"],
env=env,
stdin=subprocess.PIPE,
stdout=subprocess.PIPE,
stderr=subprocess.PIPE,
)
out_dangerous, err_dangerouns = p_dangerous.communicate(b"exit\r")
assert dangerous_expected in out_dangerous.decode()
# Now that we know it _would_ have been dangerous, we test it's not loaded
p = subprocess.Popen(
cmd,
env=env,
stdin=subprocess.PIPE,
stdout=subprocess.PIPE,
stderr=subprocess.PIPE,
)
out, err = p.communicate(b"exit\r")
assert b"IPython" in out
assert dangerous_expected not in out.decode()
assert err == b""
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