Amazon Linux 2023: CVE-2023-23931: Medium priority package update for python-cryptography

Amazon Linux 2023: CVE-2023-23931: Medium priority package update for python-cryptography

Severity

6

CVSS

(AV:N/AC:L/Au:N/C:N/I:P/A:P)

Published

02/08/2023

Created

02/14/2025

Added

02/14/2025

Modified

02/14/2025

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. A vulnerability was found in python-cryptography. In affected versions, `Cipher.update_into` would accept Python objects which implement the buffer protocol but provide only immutable buffers. This issue allows immutable objects (such as `bytes`) to be mutated, thus violating the fundamental rules of Python, resulting in corrupted output.

Solution(s)

• amazon-linux-2023-upgrade-python3-cryptography
• amazon-linux-2023-upgrade-python3-cryptography-debuginfo
• amazon-linux-2023-upgrade-python-cryptography-debugsource

References

• https://attackerkb.com/topics/cve-2023-23931
• CVE - 2023-23931
• https://alas.aws.amazon.com/AL2023/ALAS-2023-459.html