CVSS: 7.8EPSS: 0%CPEs: 1EXPL: 1CVE-2023-49083 – cryptography vulnerable to NULL-dereference when loading PKCS7 certificates
https://notcve.org/view.php?id=CVE-2023-49083
29 Nov 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 v... • https://github.com/pyca/cryptography/commit/f09c261ca10a31fe41b1262306db7f8f1da0e48a • CWE-476: NULL Pointer Dereference •
CVSS: 6.5EPSS: 1%CPEs: 1EXPL: 1CVE-2023-23931 – Cipher.update_into can corrupt memory in pyca cryptography
https://notcve.org/view.php?id=CVE-2023-23931
07 Feb 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 cr... • https://github.com/pyca/cryptography/pull/8230/commits/94a50a9731f35405f0357fa5f3b177d46a726ab3 • CWE-754: Improper Check for Unusual or Exceptional Conditions •
CVSS: 9.1EPSS: 1%CPEs: 3EXPL: 1CVE-2020-36242 – python-cryptography: Large inputs for symmetric encryption can trigger integer overflow leading to buffer overflow
https://notcve.org/view.php?id=CVE-2020-36242
07 Feb 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. En el paquete de criptografía versiones anteriores a 3.3.2 para Python, determinadas secuencias de llamadas de actualización para cifrar simétricamente valores de varios GB podrían resultar en un desbordamiento de enteros y un desbordamiento del búfer, como es demostrado por la clase Ferne... • https://github.com/pyca/cryptography/blob/master/CHANGELOG.rst • CWE-119: Improper Restriction of Operations within the Bounds of a Memory Buffer CWE-190: Integer Overflow or Wraparound CWE-787: Out-of-bounds Write •
CVSS: 7.5EPSS: 1%CPEs: 6EXPL: 0CVE-2016-9243 – Ubuntu Security Notice USN-3138-1
https://notcve.org/view.php?id=CVE-2016-9243
28 Nov 2016 — HKDF in cryptography before 1.5.2 returns an empty byte-string if used with a length less than algorithm.digest_size. HKDF en criptografía en versiones anteriores a 1.5.2 devuelve una cadena de bytes vacía si se utiliza con una longitud inferior que algorithm.digest_size. Markus Doering discovered that python-cryptography incorrectly handled certain HKDF lengths. This could result in python-cryptography returning an empty string instead of the expected derived key. • http://www.openwall.com/lists/oss-security/2016/11/09/2 • CWE-20: Improper Input Validation •