UBUNTU-CVE-2023-23931

Advisory lineage Upstream: 1 Downstream: 2
Upstream
CVE-2023-23931
Published: 07 Feb 2023, 21:15
Last modified:28 Apr 2026, 16:31

Vulnerability Summary

Overall Risk (default)
medium
26/100
CVSS Score
6.5 MEDIUM
3.1 (osv_ubuntu)
EPSS Score
No data
KEV
Not listed
Ransomware
No reports
Public exploits
None found
Dark Web
Not detected

Timeline

07 Feb 2023, 21:15
Published
Vulnerability first disclosed
28 Apr 2026, 16:31
Last Modified
Vulnerability information updated

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 Metrics

  • v3.1•MEDIUM•Score: 6.5CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L

Affected Systems

  • ubuntu•python-cryptography

    all | < 2.8-3ubuntu0.2 | < 3.4.8-1ubuntu2.1

References (5)