Local Privilege Escalation in Windows
Impact
A PyInstaller built application, elevated as a privileged process, may be tricked by an unprivileged attacker into deleting files the unprivileged user does not otherwise have access to.
A user is affected if all the following are satisfied:
- The user runs an application containing either
matplotliborwin32com. - The application is ran as administrator (or at least a user with higher privileges than the attacker).
- The user's temporary directory is not locked to that specific user (most likely due to
TMP/TEMPenvironment variables pointing to an unprotected, arbitrary, non default location). - Either:
- The attacker is able to very carefully time the replacement of a temporary file with a symlink. This switch must occur exactly between
shutil.rmtree()'s builtin symlink check and the deletion itself - The application was built with Python 3.7.x or earlier which has no protection against Directory Junctions links
- The attacker is able to very carefully time the replacement of a temporary file with a symlink. This switch must occur exactly between
Patches
The vulnerability has been addressed in https://github.com/pyinstaller/pyinstaller/pull/7827 which corresponds to pyinstaller >= 5.13.1
Workarounds
Is there a way for users to fix or remediate the vulnerability without upgrading?
No workaround, although the attack complexity becomes much higher if the application is built with Python >= 3.8.0.
Czego dotyczy
Kliknij technologię, aby zobaczyć wszystkie dotyczące jej podatności.
| Platforma | Paczka | Podatne wersje | Poprawka w wersji |
|---|---|---|---|
| Python (PyPI) | pyinstaller | < 5.13.1 | 5.13.1 |
Odnośniki
- https://github.com/pyinstaller/pyinstaller/security/advisories/GHSA-9w2p-rh8c-v9g5
- https://github.com/pyinstaller/pyinstaller/pull/7827
- https://github.com/python/cpython/blob/0fb18b02c8ad56299d6a2910be0bab8ad601ef24/Lib/shutil.py#L623
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/ISRWT34FAF23PUOLVZ7RVWBZMWPDR5U7/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/2K2XIQLEMZIKUQUOWNDYWTEWYQTKMAN7/
- https://nvd.nist.gov/vuln/detail/CVE-2023-49797
- https://github.com/pyinstaller/pyinstaller
- https://github.com/pypa/advisory-database/tree/main/vulns/pyinstaller/PYSEC-2023-292.yaml
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/2K2XIQLEMZIKUQUOWNDYWTEWYQTKMAN7
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/ISRWT34FAF23PUOLVZ7RVWBZMWPDR5U7
- Wektor CVSS
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H- Słabość (CWE)
CWE-379, CWE-732- Platforma
- Python (PyPI)
- Paczka
pyinstaller- Ujawniono
- 09.12.2023
- Aktualizacja
- 11.10.2026 11:20
Źródła i licencje
OSV / GitHub Advisory Database - PYSEC-2023-292 - PyPA Advisory Database; CC BY 4.0
OSV / GitHub Advisory Database - GHSA-9w2p-rh8c-v9g5 - CC BY 4.0
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