CVE-2023-49083: fallo de gravedad media en pyca cryptography
cryptography vulnerable to NULL-dereference when loading PKCS7 certificates
Publicada el · Actualizada el
Aviso por correo cuando entre en el KEV, tenga PoC pública o suba de nota.
13Vexday Risk Score
Sin señal de explotación. Ningún artefacto público de explotación conocido hasta ahora.
ssvc Trackcvss 5.9epss 1.0%
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.
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
Productos afectados
pyca · cryptographyCVEs relacionadas — pyca cryptography
En el mismo producto, de las más peligrosas a las menos.
CVE-2023-23931MEDIUMCipher.update_into can corrupt memory in pyca cryptographyEPSS 1.3%CVE-2024-26130HIGHcryptography NULL pointer deference with pkcs12.serialize_key_and_certificates when called with a non-matching certificate and private key and an hmac_hash overrideEPSS 0.8%CVE-2026-39892MEDIUMcryptography has a buffer overflow if non-contiguous buffers were passed to APIsEPSS 0.7%CVE-2026-26007HIGHcryptography Subgroup Attack Due to Missing Subgroup Validation for SECT CurvesEPSS 0.4%CVE-2026-69247HIGHcryptography: PKCS#7 EnvelopedData decryption exposes a Bleichenbacher oracle through distinguishable errors and timingEPSS 0.3%CVE-2026-69249HIGHpython-cryptography: Duplicate self-signed intermediates can cause exponential path-buildingEPSS 0.3%
Referencias
https://github.com/pyca/cryptography/commit/f09c261ca10a31fe41b1262306db7f8f1da0e48ahttps://github.com/pyca/cryptography/pull/9926https://github.com/pyca/cryptography/security/advisories/GHSA-jfhm-5ghh-2f97https://lists.debian.org/debian-lts-announce/2024/10/msg00012.htmlhttps://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/QMNTYMUGFJSDBYBU22FUYBHFRZODRKXV/