PYSEC-2023-292
Vulnerability from pysec - Published: 2023-12-09 01:15 - Updated: 2024-11-21 14:22PyInstaller bundles a Python application and all its dependencies into a single package. 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: 1. The user runs an application containing either matplotlib or win32com. 2. The application is ran as administrator (or at least a user with higher privileges than the attacker). 3. The user's temporary directory is not locked to that specific user (most likely due to TMP/TEMP environment variables pointing to an unprotected, arbitrary, non default location). Either: A. 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 B: The application was built with Python 3.7.x or earlier which has no protection against Directory Junctions links. The vulnerability has been addressed in PR #7827 which corresponds to pyinstaller >= 5.13.1. Users are advised to upgrade. There are no known workarounds for this vulnerability.
| Name | purl | pyinstaller | pkg:pypi/pyinstaller |
|---|
{
"affected": [
{
"package": {
"ecosystem": "PyPI",
"name": "pyinstaller",
"purl": "pkg:pypi/pyinstaller"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "5.13.1"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"1.5",
"1.5.1",
"2.0",
"2.1",
"3.0",
"3.1",
"3.1.1",
"3.2",
"3.2.1",
"3.3",
"3.3.1",
"3.4",
"3.5",
"3.6",
"4.0",
"4.1",
"4.10",
"4.2",
"4.3",
"4.4",
"4.5",
"4.5.1",
"4.6",
"4.7",
"4.8",
"4.9",
"5.0",
"5.0.1",
"5.1",
"5.10.0",
"5.10.1",
"5.11.0",
"5.12.0",
"5.13.0",
"5.2",
"5.3",
"5.4",
"5.4.1",
"5.5",
"5.6",
"5.6.1",
"5.6.2",
"5.7.0",
"5.8.0",
"5.9.0"
]
}
],
"aliases": [
"CVE-2023-49797",
"GHSA-9w2p-rh8c-v9g5"
],
"details": "PyInstaller bundles a Python application and all its dependencies into a single package. 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: 1. The user runs an application containing either `matplotlib` or `win32com`. 2. The application is ran as administrator (or at least a user with higher privileges than the attacker). 3. The user\u0027s temporary directory is not locked to that specific user (most likely due to `TMP`/`TEMP` environment variables pointing to an unprotected, arbitrary, non default location). Either: A. 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()`\u0027s builtin symlink check and the deletion itself B: The application was built with Python 3.7.x or earlier which has no protection against Directory Junctions links. The vulnerability has been addressed in PR #7827 which corresponds to `pyinstaller \u003e= 5.13.1`. Users are advised to upgrade. There are no known workarounds for this vulnerability.",
"id": "PYSEC-2023-292",
"modified": "2024-11-21T14:22:59.796437+00:00",
"published": "2023-12-09T01:15:00+00:00",
"references": [
{
"type": "ADVISORY",
"url": "https://github.com/pyinstaller/pyinstaller/security/advisories/GHSA-9w2p-rh8c-v9g5"
},
{
"type": "REPORT",
"url": "https://github.com/pyinstaller/pyinstaller/pull/7827"
},
{
"type": "FIX",
"url": "https://github.com/pyinstaller/pyinstaller/pull/7827"
},
{
"type": "WEB",
"url": "https://github.com/python/cpython/blob/0fb18b02c8ad56299d6a2910be0bab8ad601ef24/Lib/shutil.py#L623"
},
{
"type": "WEB",
"url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/ISRWT34FAF23PUOLVZ7RVWBZMWPDR5U7/"
},
{
"type": "WEB",
"url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/2K2XIQLEMZIKUQUOWNDYWTEWYQTKMAN7/"
}
],
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
}
]
}
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
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- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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