Description
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.
References (5)
Core 5
Core References
Mailing List, Third Party Advisory
https://lists.fedoraproject.org/archives/list/[email protected]/message/QMNTYMUGFJSDBYBU22FUYBHFRZODRKXV/
Exploit, Vendor Advisory x_refsource_confirm
https://github.com/pyca/cryptography/security/advisories/GHSA-jfhm-5ghh-2f97
Issue Tracking, Patch x_refsource_misc
https://github.com/pyca/cryptography/pull/9926
Scores
CVSS v3
5.9
EPSS
0.0093
EPSS Percentile
76.2%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
CISA SSVC
Vulnrichment
Exploitation
poc
Automatable
no
Technical Impact
partial
Details
CWE
CWE-476
Status
published
Products (2)
cryptography.io/cryptography
3.1 - 41.0.6
pypi/cryptography
3.1 - 41.0.6PyPI
Published
Nov 29, 2023
Tracked Since
Feb 18, 2026