CVE-2023-23931

MEDIUM
Published Feb 7, 20233y ago · Modified Jun 17, 20262w ago
6.5 CVSS 3.1
Medium
Find Similar
Published Feb 7, 2023 3y ago
Last Modified Jun 17, 2026 2w ago

Description

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 Details

Base Score
6.5
Exploitability
3.9
Impact
2.5
Vector string
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction None
Scope Unchanged
Confidentiality None
Integrity Low
Availability Low

Threat Intelligence

No active exploitation signals — not in CISA KEV and no EPSS score yet.

Exploit & Patch Status
Public Exploit Known
Patch Available

Weaknesses 1

CWE-754

Affected Products 1

VendorProductVersionRange
cryptography.iocryptography*≥1.8  –  <39.0.1

References 4

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

Remediation

  • github.com https://github.com/pyca/cryptography/pull/8230/commits/94a50a9731f35405f0357fa5f3b177d46a726ab3
    Patch