CVE-2024-0397
Memory race condition in ssl.SSLContext certificate store methods
- State
- Published
- Severity
- 7.4 High
- Published
- Jun 17, 2024
- Updated
- Nov 3, 2025
- Reserved
- Jan 10, 2024
Description
A defect was discovered in the Python “ssl” module where there is a memory race condition with the ssl.SSLContext methods “cert_store_stats()” and “get_ca_certs()”. The race condition can be triggered if the methods are called at the same time as certificates are loaded into the SSLContext, such as during the TLS handshake with a certificate directory configured. This issue is fixed in CPython 3.10.14, 3.11.9, 3.12.3, and 3.13.0a5.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 3.1 | 7.4 High | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:H | CISA-ADP |
Weaknesses
- CWE-362 Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')
Affected Products
| Product | Versions |
|---|---|
CPythonPython Software Foundation |
|
References
- https://github.com/python/cpython/issues/114572issue-tracking
- https://github.com/python/cpython/pull/114573patch
- https://mail.python.org/archives/list/security-announce@python.org/thread/BMAK5BCGKYWNJOACVUSLUF6SFGBIM4VP/vendor-advisory
- https://github.com/python/cpython/commit/01c37f1d0714f5822d34063ca7180b595abf589dpatch
- https://github.com/python/cpython/commit/29c97287d205bf2f410f4895ebce3f43b5160524patch
- https://github.com/python/cpython/commit/37324b421b72b7bc9934e27aba85d48d4773002epatch
- https://github.com/python/cpython/commit/542f3272f56f31ed04e74c40635a913fbc12d286patch
- https://github.com/python/cpython/commit/b228655c227b2ca298a8ffac44d14ce3d22f6faapatch
- https://github.com/python/cpython/commit/bce693111bff906ccf9281c22371331aaff766abpatch
- http://www.openwall.com/lists/oss-security/2024/06/17/2
- https://security.netapp.com/advisory/ntap-20250411-0006/
- https://lists.debian.org/debian-lts-announce/2024/12/msg00000.html
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