CVE-2023-52323

Publication date 5 January 2024

Last updated 26 August 2025

Ubuntu priority

Medium

Why this priority?

Cvss 3 Severity Score

5.9 · Medium

Score breakdown

Description

PyCryptodome and pycryptodomex before 3.19.1 allow side-channel leakage for OAEP decryption, exploitable for a Manger attack.

Read the notes from the security team

Status

Package Ubuntu Release Status
pycryptodome 24.04 LTS noble
Not affected
23.10 mantic Ignored end of life, was needed
23.04 lunar Ignored end of life, was needed
22.04 LTS jammy
Fixed 3.11.0+dfsg1-3ubuntu0.1
20.04 LTS focal Ignored
18.04 LTS bionic Ignored end of standard support
16.04 LTS xenial Not in release
14.04 LTS trusty Not in release

Notes

mdeslaur

Ubuntu 20.04 LTS and older contain a substantially older codebase which would require major intrusive changes to remediate all side-channel attacks. Due to the high risk of regressions, we will not be fixing this issue in focal and older. If this issue is critical in your environment, we recommend migrating to a more recent version of Ubuntu.

Patch details

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

Package Patch details
pycryptodome

Severity score breakdown

CVSS version: CVSS v3.0

Base score 5.9 · Medium

Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N

References

Related Ubuntu Security Notices (USN)

    • USN-6595-1
    • PyCryptodome vulnerability
    • 23 January 2024

Other references

Access our resources on patching vulnerabilities