CVE-2024-26130: cryptography Null Dereference — Fix

Description

cryptography is a package designed to expose cryptographic primitives and recipes to Python developers. Starting in version 38.0.0 and prior to 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.

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CVSS v3.1 Score

7.5

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Weakness Type (CWE)

CWE-476 CWE-476

Affected Products

Vendor	Product	Versions
cryptography.io	cryptography	38.0.0 — 42.0.4

References

Advisories & Patches

https://github.com/pyca/cryptography/commit/97d231672763cdb5959a3b191e692a362f1b9e55 https://github.com/pyca/cryptography/pull/10423 https://github.com/pyca/cryptography/security/advisories/GHSA-6vqw-3v5j-54x4 https://github.com/pyca/cryptography/commit/97d231672763cdb5959a3b191e692a362f1b9e55 https://github.com/pyca/cryptography/pull/10423 https://github.com/pyca/cryptography/security/advisories/GHSA-6vqw-3v5j-54x4

Frequently Asked Questions

What is CVE-2024-26130? +

cryptography is a package designed to expose cryptographic primitives and recipes to Python developers. Starting in version 38.0.0 and prior to 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. It has a CVSS v3.1 base score of 7.5 (HIGH).

How severe is CVE-2024-26130? +

CVE-2024-26130 has a CVSS v3.1 score of 7.5 out of 10, rated HIGH. This is a high-severity vulnerability that should be prioritized for patching.

What products are affected by CVE-2024-26130? +

CVE-2024-26130 affects products from cryptography.io, specifically: cryptography. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2024-26130? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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