filelock is a platform-independent file lock for Python. From 3.20.4 until 4.2.1, ReadWriteLock let SQLite reopen the database and side files by name; on POSIX systems an attacker with rename access in a non-sticky parent can swap those names to cause overwrite or unlink operations, while a writable adjacent hot journal is additionally required for attacker-chosen content overwrites. This issue is fixed in version 4.2.1.
Weakness
The product checks the status of a file or directory before accessing it, which produces a race condition in which the file can be replaced with a link before the access is performed, causing the product to access the wrong file.
Affected Software
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Filelock | Tox-dev | 3.20.4 (including) | 4.2.1 (excluding) |
Related Attack Patterns
References
- https://github.com/tox-dev/filelock/commit/5e3f2ec0c5fb17cb2635b60b2b68bc63ab81ca2d
- https://github.com/tox-dev/filelock/pull/834
- https://github.com/tox-dev/filelock/releases/tag/4.2.1
- https://github.com/tox-dev/filelock/security/advisories/GHSA-v4x8-3wr5-3wq8
- https://github.com/tox-dev/filelock/security/advisories/GHSA-v4x8-3wr5-3wq8