CVE-2023-23931

cryptography is a package designed to expose cryptographic primitives and recipes to Python developers. In affected versions `Cipher.update_into` would accept Python objects which implement the buffer protocol, but provide only immutable buffers. This would allow immutable objects (such as `bytes`) to be mutated, thus violating fundamental rules of Python and resulting in corrupted output. This now correctly raises an exception. This issue has been present since `update_into` was originally introduced in cryptography 1.8.

CVSS v3 4.8 MEDIUM

4.8^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 2.2 / Impact : 2.5

Attack Vector NETWORK

Attack Complexity HIGH

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact LOW

Availability Impact LOW

Scope UNCHANGED

References

Link	Resource
https://github.com/pyca/cryptography/pull/8230/commits/94a50a9731f35405f0357fa5f3b177d46a726ab3	Patch
https://github.com/pyca/cryptography/security/advisories/GHSA-w7pp-m8wf-vj6r	Exploit Vendor Advisory
https://github.com/pyca/cryptography/pull/8230/commits/94a50a9731f35405f0357fa5f3b177d46a726ab3	Patch
https://github.com/pyca/cryptography/security/advisories/GHSA-w7pp-m8wf-vj6r	Exploit Vendor Advisory
https://lists.debian.org/debian-lts-announce/2024/10/msg00012.html
https://security.netapp.com/advisory/ntap-20230324-0007/

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 : 2023-02-07 21:15

Updated : 2025-11-03 22:16

NVD link : CVE-2023-23931

Mitre link : CVE-2023-23931

CVE.ORG link : CVE-2023-23931

JSON object : View

Products Affected

cryptography.io

cryptography

CWE

CWE-754

Improper Check for Unusual or Exceptional Conditions

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