Your submission was sent successfully! Close

Thank you for contacting us. A member of our team will be in touch shortly. Close

You have successfully unsubscribed! Close

Thank you for signing up for our newsletter!
In these regular emails you will find the latest updates about Ubuntu and upcoming events where you can meet our team.Close

CVE-2023-23931

Publication date 7 February 2023

Last updated 24 July 2024

Ubuntu priority

Low

Why this priority?

Cvss 3 Severity Score

6.5 · Medium

Score breakdown

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.

Read the notes from the security team

Status

Package Ubuntu Release Status
python-cryptography 24.10 oracular
Not affected
24.04 LTS noble
Not affected
23.10 mantic
Not affected
23.04 lunar
Fixed 38.0.4-2ubuntu0.1
22.10 kinetic Ignored end of life, was needed
22.04 LTS jammy
Fixed 3.4.8-1ubuntu2.1
20.04 LTS focal
Fixed 2.8-3ubuntu0.2
18.04 LTS bionic
Vulnerable
16.04 LTS xenial
Not affected
14.04 LTS trusty Ignored end of standard support, was not-affected

Notes

mdeslaur

Per the upstream advisory: "This is a soundness bug -- it allows programmers to misuse an API, it cannot be exploited by attacker controlled data alone."

seth-arnold

Debian's update was incomplete, see 2.6.1-3+deb10u4

ccdm94

as per the advisory, this vulnerability was introduced in version 1.8.

Patch details

For informational purposes only. We recommend not to cherry-pick updates. How can I get the fixes?

Package Patch details
python-cryptography

Severity score breakdown

Parameter Value
Base score 6.5 · Medium
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Scope Unchanged
Confidentiality None
Integrity impact Low
Availability impact Low
Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L