CVE-2023-49797

Source
https://nvd.nist.gov/vuln/detail/CVE-2023-49797
Import Source
https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2023-49797.json
JSON Data
https://api.test.osv.dev/v1/vulns/CVE-2023-49797
Aliases
Related
Published
2023-12-09T01:15:07Z
Modified
2025-02-14T04:08:42Z
Severity
  • 7.8 (High) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H CVSS Calculator
Summary
[none]
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.

References

Affected packages

Git / github.com/pyinstaller/pyinstaller

Affected ranges

Type
GIT
Repo
https://github.com/pyinstaller/pyinstaller
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed