CVE-2024-0397
Memory race condition in ssl.SSLContext certificate store methods
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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.
Affected
Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.
Remediation
No guide yetNo remediation guidance has been written for this CVE yet. What the record does show:
Patch and advisory references
- https://github.com/python/cpython/commit/01c37f1d0714f5822d34063ca7180b595abf589d
- https://github.com/python/cpython/commit/29c97287d205bf2f410f4895ebce3f43b5160524
- https://github.com/python/cpython/commit/37324b421b72b7bc9934e27aba85d48d4773002e
- https://github.com/python/cpython/commit/542f3272f56f31ed04e74c40635a913fbc12d286
- https://github.com/python/cpython/commit/b228655c227b2ca298a8ffac44d14ce3d22f6faa
References (12)
SSVC — Action Prioritization
SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.
CVSS
- Attack Vector
- NETWORK
- Complexity
- HIGH
- Privileges
- NONE
- User Interaction
- NONE
- Scope
- UNCHANGED
- Confidentiality
- HIGH
- Integrity
- NONE
- Availability
- HIGH
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