CVE-2023-49083

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 v3 5.9 MEDIUM

5.9^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 2.2 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity HIGH

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://github.com/pyca/cryptography/commit/f09c261ca10a31fe41b1262306db7f8f1da0e48a	Patch
https://github.com/pyca/cryptography/pull/9926	Issue Tracking Patch
https://github.com/pyca/cryptography/security/advisories/GHSA-jfhm-5ghh-2f97	Exploit Vendor Advisory
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/QMNTYMUGFJSDBYBU22FUYBHFRZODRKXV/
https://github.com/pyca/cryptography/commit/f09c261ca10a31fe41b1262306db7f8f1da0e48a	Patch
https://github.com/pyca/cryptography/pull/9926	Issue Tracking Patch
https://github.com/pyca/cryptography/security/advisories/GHSA-jfhm-5ghh-2f97	Exploit Vendor Advisory
https://lists.debian.org/debian-lts-announce/2024/10/msg00012.html
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/QMNTYMUGFJSDBYBU22FUYBHFRZODRKXV/

Configurations

Configuration 1 (hide)

cpe:2.3:a:cryptography.io:cryptography:*:*:*:*:*:python:*:*

History

03 Nov 2025, 22:16

Type	Values Removed	Values Added
References		() https://lists.debian.org/debian-lts-announce/2024/10/msg00012.html -

Information

Published : 2023-11-29 19:15

Updated : 2025-11-03 22:16

NVD link : CVE-2023-49083

Mitre link : CVE-2023-49083

CVE.ORG link : CVE-2023-49083

JSON object : View

Products Affected

cryptography.io

cryptography

CWE

CWE-476

NULL Pointer Dereference

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