Description (CNA)
There is a defect in the CPython standard library module “mimetypes” where on Windows the default list of known file locations are writable meaning other users can create invalid files to cause MemoryError to be raised on Python runtime startup or have file extensions be interpreted as the incorrect file type. This defect is caused by the default locations of Linux and macOS platforms (such as “/etc/mime.types”) also being used on Windows, where they are user-writable locations (“C:\etc\mime.types”). To work-around this issue a user can call mimetypes.init() with an empty list (“[]”) on Windows platforms to avoid using the default list of known file locations.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Python Software Foundation / CPython | affected 0 before 3.14.9; affected 3.15.0 before 3.15.1; affected 3.16.0a1 before 3.16.0 |
CWE
CWE-426
References
- https://mail.python.org/archives/list/security-announce@python.org/thread/CDXW34ND2LSAOYAR5N6UNONP4ZBX4D6R/
- https://github.com/python/cpython/issues/159428
- https://github.com/python/cpython/commit/04a29bf8f9ff8526cd96cb7368400173303a390a
- https://github.com/python/cpython/commit/5550519259656cbb8eeac09e3dbc0d5c248a4dea
- https://github.com/python/cpython/commit/76f4555c4ff10f5dda58d6528c17787df41e256c
ADP enrichment
No English description supplied.
No references supplied.
No English description supplied.