filelock Time-of-Check-Time-of-Use (TOCTOU) Symlink Vulnerability in SoftFileLock
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | ||||||
|---|---|---|---|---|---|---|---|---|---|
| tox-dev | filelock | affected |
|
No data.
| Vendor | Product | Versions |
|---|---|---|
| Tox-dev | Filelock | — |
| Source | ID | Title |
|---|---|---|
Github GHSA |
GHSA-qmgc-5h2g-mvrw | filelock Time-of-Check-Time-of-Use (TOCTOU) Symlink Vulnerability in SoftFileLock |
No CVSS v4.0
No CVSS v3.0
No CVSS v2
This CVE is not in the KEV list.
Exploit prediction score: < 1% (0.127% probability within 30 days)
| Type | Values Removed | Values Added |
|---|---|---|
| CPEs | cpe:2.3:a:tox-dev:filelock:*:*:*:*:*:python:*:* |
| Type | Values Removed | Values Added |
|---|---|---|
| References |
| |
| Metrics |
threat_severity
|
threat_severity
|
| Type | Values Removed | Values Added |
|---|---|---|
| Metrics |
ssvc
|
| Type | Values Removed | Values Added |
|---|---|---|
| First Time appeared |
Tox-dev
Tox-dev filelock |
|
| Vendors & Products |
Tox-dev
Tox-dev filelock |
| Type | Values Removed | Values Added |
|---|---|---|
| Description | filelock is a platform-independent file lock for Python. Prior to version 3.20.3, a TOCTOU race condition vulnerability exists in the SoftFileLock implementation of the filelock package. An attacker with local filesystem access and permission to create symlinks can exploit a race condition between the permission validation and file creation to cause lock operations to fail or behave unexpectedly. The vulnerability occurs in the _acquire() method between raise_on_not_writable_file() (permission check) and os.open() (file creation). During this race window, an attacker can create a symlink at the lock file path, potentially causing the lock to operate on an unintended target file or leading to denial of service. This issue has been patched in version 3.20.3. | |
| Title | filelock Time-of-Check-Time-of-Use (TOCTOU) Symlink Vulnerability in SoftFileLock | |
| Weaknesses | CWE-362 CWE-367 CWE-59 |
|
| References |
| |
| Metrics |
cvssV3_1
|