Cryptographyio Cryptography

cryptography is a package designed to expose cryptographic primitives and recipes to Python developers

CVE-2024-26130 7.5 - High - February 21, 2024

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.

NULL Pointer Dereference

A flaw was found in the python-cryptography package

CVE-2023-50782 7.5 - High - February 05, 2024

A flaw was found in the python-cryptography package. This issue may allow a remote attacker to decrypt captured messages in TLS servers that use RSA key exchanges, which may lead to exposure of confidential or sensitive data.

Side Channel Attack

cryptography is a package designed to expose cryptographic primitives and recipes to Python developers

CVE-2023-49083 7.5 - High - November 29, 2023

cryptography is a package designed to expose cryptographic primitives and recipes to Python developers. Calling `load_pem_pkcs7_certificates` or `load_der_pkcs7_certificates` could lead to a NULL-pointer dereference and segfault. Exploitation of this vulnerability poses a serious risk of Denial of Service (DoS) for any application attempting to deserialize a PKCS7 blob/certificate. The consequences extend to potential disruptions in system availability and stability. This vulnerability has been patched in version 41.0.6.

NULL Pointer Dereference

The cryptography package before 41.0.2 for Python mishandles SSH certificates

CVE-2023-38325 7.5 - High - July 14, 2023

The cryptography package before 41.0.2 for Python mishandles SSH certificates that have critical options.

Improper Certificate Validation

cryptography is a package designed to expose cryptographic primitives and recipes to Python developers

CVE-2023-23931 6.5 - Medium - February 07, 2023

cryptography is a package designed to expose cryptographic primitives and recipes to Python developers. In affected versions `Cipher.update_into` would accept Python objects which implement the buffer protocol, but provide only immutable buffers. This would allow immutable objects (such as `bytes`) to be mutated, thus violating fundamental rules of Python and resulting in corrupted output. This now correctly raises an exception. This issue has been present since `update_into` was originally introduced in cryptography 1.8.

Improper Check for Unusual or Exceptional Conditions

In the cryptography package before 3.3.2 for Python

CVE-2020-36242 9.1 - Critical - February 07, 2021

In the cryptography package before 3.3.2 for Python, certain sequences of update calls to symmetrically encrypt multi-GB values could result in an integer overflow and buffer overflow, as demonstrated by the Fernet class.

Memory Corruption

python-cryptography 3.2 is vulnerable to Bleichenbacher timing attacks in the RSA decryption API

CVE-2020-25659 5.9 - Medium - January 11, 2021

python-cryptography 3.2 is vulnerable to Bleichenbacher timing attacks in the RSA decryption API, via timed processing of valid PKCS#1 v1.5 ciphertext.

HKDF in cryptography before 1.5.2 returns an empty byte-string if used with a length less than algorithm.digest_size.

CVE-2016-9243 7.5 - High - March 27, 2017

HKDF in cryptography before 1.5.2 returns an empty byte-string if used with a length less than algorithm.digest_size.