Home/CVE/cryptography is a package designed to expose cryptographic primitives and recipes to Python developers. Calling `load_pe
CVE

CVE-2023-49083

cryptography is a package designed to expose cryptographic primitives and recipes to Python developers. Calling `load_pe

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.

MEDIUM · CVSS 5.9 EPSS 0.01255
Schedule remediation
  • Public exploit or PoC is available
Sigma rules0 YARA rules0
⬡

Weakness Classification

CWE-476NULL Pointer Dereference
▤

Affected Products & Versions

1
cryptography.io cryptography>= 3.1 and < 41.0.6
▤

Affected Packages

1
Language-ecosystem packages (from OSV) tied to this CVE, with the version that fixes it - the dependency-level detail NVD doesn’t carry.
PyPI cryptography MODERATE fixed in 41.0.6
⚠

Public Exploits & PoCs

1
pocgithub.com · GHSA-jfhm-5ghh-2f97github.com
▣

Scoring & Timeline

5.9
MEDIUM · CVSS v3.1 · security-advisories@github.com
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD29 Nov 2023 · 07:15 PM
CVSS VectorCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
SSVC triage · cisa-vulnrichment
Exploitation
poc
Automatable
no
Technical impact
partial
SSVC asks the questions that actually drive patch urgency: is it being exploited, can attacks be automated, and how total is the impact.
⚑

Vendor Advisories

22
suse-csafopenSUSE-SU-2024:13472-1
rhsaRHSA-2024:3781Moderate
rhsaRHSA-2024:1640Important
rhsaRHSA-2024:1878Moderate
suse-csafSUSE-SU-2023:4921-1
🔗

References & Sources

4
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
https://github.com/pyca/cryptography/commit/f09c261ca10a31fe41b1262306db7f8f1da0e48aPatch
https://github.com/pyca/cryptography/pull/9926Issue TrackingPatch
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/QMNTYMUGFJSDBYBU22FUYBHFRZODRKXV/
https://lists.debian.org/debian-lts-announce/2024/10/msg00012.html
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