GHSA-6vqw-3v5j-54x4
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
Packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| PyPI | cryptography | >= 38.0.0, < 42.0.4 | 42.0.4 |
Details
As written in the advisory (Markdown source, shown as plain text).
If `pkcs12.serialize_key_and_certificates` is called with both:
1. A certificate whose public key did not match the provided private key
2. 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, and now a `ValueError` is properly raised.
Patched in https://github.com/pyca/cryptography/pull/10423
References
External links from the advisory. They lead to third-party sites.
- https://github.com/pyca/cryptography/security/advisories/GHSA-6vqw-3v5j-54x4
- https://nvd.nist.gov/vuln/detail/CVE-2024-26130
- https://github.com/pyca/cryptography/pull/10423
- https://github.com/pyca/cryptography/commit/97d231672763cdb5959a3b191e692a362f1b9e55
- https://github.com/pyca/cryptography
- https://github.com/pypa/advisory-database/tree/main/vulns/cryptography/PYSEC-2024-225.yaml