pysec-2023-292
Vulnerability from pysec
Published
2023-12-09 01:15
Modified
2024-11-21 14:22
Severity ?
7.8 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
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'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.

Impacted products
Name purl
pyinstaller pkg:pypi/pyinstaller
Aliases


To clipboard 

{
  "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"
    }
  ]
}


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