filelock: StrictSoftFileLock follows a symbolic link swapped in at <path>.filelock and creates claim files in a directory another local user chooses

Özet

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filelock is a platform-independent file lock for Python. From 3.30.0 until 4.2.1, On POSIX platforms, StrictSoftFileLock and AsyncStrictSoftFileLock validate the coordination directory in _ensure_protocol_directory but later reach the claims directory through _open_directory by pathname, allowing a local account that can rename the coordination name to swap in a symbolic link between check and use during acquisition. That race can create and leave claim files in another writable directory or strand claims in a different strict lock so the second lock times out. Separately, the claims property and force_break follow a resting symbolic link without a race when the lock user inspects or recovers the lock. Claims inspection discloses a file name to the other account only if the resulting exception text or claim_name reaches that account through a shared log, CI output, or error report. A blind force_break recovery that removes live claims from another strict lock can allow two processes into that lock's critical section; this path reaches other strict locks, not arbitrary files. This issue is fixed in version 4.2.1.

Etkilenen sürümler1 yazılım

Kaynaklar7 kaynak

• CVE.org kaydı
• NVD kaydı
• github.com/…lelock/security/advisories/GHSA-m462-7rxw-wvpg Diğer
• github.com/tox-dev/filelock/pull/839 Diğer
• github.com/…ommit/aaa18595d29795fab599a69d6b184d9a505dab4b Diğer
• github.com/…ommit/bfa066d65a1ba9106f86ee9d027f7588b9c77e03 Diğer
• github.com/tox-dev/filelock/releases/tag/4.2.1 Diğer

Kayıt geçmişi

1. 6 Kas 2026 00:51Yayımlandı

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