cryptography

pyca/cryptography .. image:: https://img.shields.io/pypi/v/cryptography.svg :target: https://pypi.org/project/cryptography/ :alt: Latest Version .. image:: https://readthedocs.org/projects/cryptography/badge/?version=latest :target: https://cryptography.io :alt: Latest Docs .. image::...

Python Now Has a Post-Quantum Encryption Library

This is good: Post-quantum cryptography is now one pip-install away for the entire Python ecosystem. With funding from the Sovereign Tech Agency, we implemented support for ML-KEM, the NIST-standard key-establishment primitive, and ML-DSA, the NIST-standard digital-signature primitive, in...

pyca/cryptography has a vulnerable OpenSSL included in cryptography wheels

pyca/cryptography's wheels include a statically linked copy of OpenSSL. The versions of OpenSSL included in cryptography 37.0.0-43.0.0 are vulnerable to a security issue. More details about the vulnerability itself can be found in https://openssl-library.org/news/secadv/20240903.txt. If you are...

Cipher.update_into can corrupt memory in pyca cryptography

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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

If pkcs12.serializekeyandcertificates is called with both: 1. A certificate whose public key did not match the provided private key 2. An encryptionalgorithm with hmachash set via PrivateFormat.PKCS12.encryptionbuilder.hmachash... Then a NULL pointer dereference would occur, crashing the Python...

pyca/cryptography's wheels include vulnerable OpenSSL

pyca/cryptography's wheels include a statically linked copy of OpenSSL. The versions of OpenSSL included in cryptography 0.8-41.0.2 are vulnerable to several security issues. More details about the vulnerabilities themselves can be found in https://www.openssl.org/news/secadv/20230731.txt,...

CVE-2023-23931 Cipher.update_into can corrupt memory in pyca cryptography

cryptography is a package designed to expose cryptographic primitives and recipes to Python developers. In affected versions Cipher.updateinto would accept Python objects which implement the buffer protocol, but provide only immutable buffers. This would allow immutable objects such as bytes to b...

CVE-2023-23931 Cipher.update_into can corrupt memory in pyca cryptography

cryptography is a package designed to expose cryptographic primitives and recipes to Python developers. In affected versions Cipher.updateinto would accept Python objects which implement the buffer protocol, but provide only immutable buffers. This would allow immutable objects such as bytes to b...

PyCA Cryptography symmetrically encrypting large values can lead to integer overflow

cryptography is a package designed to expose cryptographic primitives and recipes to Python developers. When certain sequences of update calls with large values multiple GBs for symetric encryption or decryption occur, it's possible for an integer overflow to happen, leading to mishandling of...

NaCl Is Not a High-Level API

When talking about high-level application cryptography APIs I usually hear mentioned libsodium, Tink, pyca/cryptography, and NaCl. One of these things is not like the others! The value NaCl had 10 years ago was that it was an opinionated library at a time when all cryptography libraries were...

PyCA Cryptography vulnerable to GCM tag forgery

A flaw was found in python-cryptography versions between =1.9.0 and 2.3. The finalizewithtag API did not enforce a minimum tag length. If a user did not validate the input length prior to passing it to finalizewithtag an attacker could craft an invalid payload with a shortened tag e.g. 1 byte suc...