CVE-2023-49083 — cryptography vulnerable to NULL-dereference when loading PKCS7 certificates

Affected: pyca cryptography

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.

USN-6539-1 — python-cryptography vulnerabilities

Affected: Ubuntu:20.04:LTS: python-cryptography, Ubuntu:22.04:LTS: python-cryptography

It was discovered that the python-cryptography Cipher.update_into function would incorrectly accept objects with immutable buffers. This would result in corrupted output, contrary to expectations. This issue only affected Ubuntu 20.04 LTS, Ubuntu 22.04 LTS, and Ubuntu 23.04. (CVE-2023-23931)

It was dicovered that python-cryptography incorrectly handled loading certain PKCS7 certificates. A remote attacker could possibly use this issue to cause python-cryptography to crash, resulting in a denial of service. This issue only affected Ubuntu 22.04 LTS, Ubuntu 23.04, and Ubuntu 23.10. (CVE-2023-49083)

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CVE-2023-49083 — cryptography vulnerable to NULL-dereference when loading PKCS7 certificates

USN-6539-1 — python-cryptography vulnerabilities