CVE-2023-49083

HIGH EPSS 57.9%

Published Nov 29, 20232y ago · Modified Jun 17, 20262w ago

7.5 CVSS 3.1

High

Published Nov 29, 2023 2y ago

Last Modified Jun 17, 2026 2w ago

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.

CVSS Details

Base Score

7.5

Exploitability

3.9

Impact

3.6

Vector string

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Attack Vector Network

Attack Complexity Low

Privileges Required None

User Interaction None

Scope Unchanged

Confidentiality None

Integrity None

Availability High

Threat Intelligence

EPSS Exploit Probability

57.9% percentile

Exploit & Patch Status

Public Exploit Known

Patch Available

Weaknesses 1

CWE-476 NULL Pointer Dereference Memory Safety

Affected Products 1

Vendor	Product	Version	Range
cryptography.io	cryptography	*	≥3.1 – <41.0.6

References 5

github.com https://github.com/pyca/cryptography/commit/f09c261ca10a31fe41b1262306db7f8f1da0e48a

Patch
github.com https://github.com/pyca/cryptography/pull/9926

Issue TrackingPatch
github.com https://github.com/pyca/cryptography/security/advisories/GHSA-jfhm-5ghh-2f97

ExploitVendor Advisory
lists.debian.org https://lists.debian.org/debian-lts-announce/2024/10/msg00012.html
lists.fedoraproject.org https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/QMNTYMUGFJSDBYBU22FUYBHFRZODRKXV/

Remediation

github.com https://github.com/pyca/cryptography/commit/f09c261ca10a31fe41b1262306db7f8f1da0e48a

Patch
github.com https://github.com/pyca/cryptography/pull/9926

Issue TrackingPatch