PyPI: cryptography
CVE-2024-26130
Safety vulnerability ID: SFTY-20240221-55899
Safety legacy ID: pyup.io-66704
cryptography is a package designed to expose cryptographic primitives and recipes to Python developers. Starting in version 38.0.0 and before version 42.0.4, if `pkcs12.serialize_key_and_certificates` is called with both a certificate whose public key did not match the provided private key and an `encryption_algorithm` with `hmac_hash` set (via `PrivateFormat.PKCS12.encryption_builder().hmac_hash(...)`, then a NULL pointer dereference would occur, crashing the Python process. This has been resolved in version 42.0.4, the first version in which a `ValueError` is properly raised.
Overview
cryptography NULL pointer dereference with pkcs12.serialize_key_and_certificates when called with a non-matching certificate and private key and an hmac_hash override
Advisory
cryptography is a package designed to expose cryptographic primitives and recipes to Python developers. Starting in version 38.0.0 and before version 42.0.4, if `pkcs12.serialize_key_and_certificates` is called with both a certificate whose public key did not match the provided private key and an `encryption_algorithm` with `hmac_hash` set (via `PrivateFormat.PKCS12.encryption_builder().hmac_hash(...)`, then a NULL pointer dereference would occur, crashing the Python process. This has been resolved in version 42.0.4, the first version in which a `ValueError` is properly raised.
How to Fix
Mitigation and Workarounds
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Vulnerable Functions
Functions linked to known vulnerabilities.
References
- https://getsafety.com/vulnerabilities/SFTY-20240221-55899/CVE-2024-26130
- https://github.com/pyca/cryptography/security/advisories/GHSA-6vqw-3v5j-54x4
- https://github.com/pyca/cryptography/pull/10423
- https://github.com/pyca/cryptography/commit/97d231672763cdb5959a3b191e692a362f1b9e55
- https://nvd.nist.gov/vuln/detail/CVE-2024-26130
- https://github.com/pypa/advisory-database/tree/main/vulns/cryptography/PYSEC-2024-225.yaml
- https://github.com/advisories/GHSA-6vqw-3v5j-54x4
Verified by Safety
Our Cybersecurity Intelligence Team reviewed this vulnerability. We combine public data with our own research to find issues not yet reported to public sources.
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