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CVE-2024-3651

Publication date 23 April 2024

Last updated 24 July 2024

Ubuntu priority

Medium

Why this priority?

Cvss 3 Severity Score

7.5 · High

Score breakdown

A vulnerability was identified in the kjd/idna library, specifically within the `idna.encode()` function, affecting version 3.6. The issue arises from the function's handling of crafted input strings, which can lead to quadratic complexity and consequently, a denial of service condition. This vulnerability is triggered by a crafted input that causes the `idna.encode()` function to process the input with considerable computational load, significantly increasing the processing time in a quadratic manner relative to the input size.

Read the notes from the security team

Status

Package Ubuntu Release Status
python-idna 24.04 LTS noble
Fixed 3.6-2ubuntu0.1
23.10 mantic
Fixed 3.3-2ubuntu0.1
22.04 LTS jammy
Fixed 3.3-1ubuntu0.1
20.04 LTS focal
Fixed 2.8-1ubuntu0.1
18.04 LTS bionic
16.04 LTS xenial
python-pip 24.04 LTS noble
Needs evaluation
23.10 mantic Ignored
22.04 LTS jammy
Needs evaluation
20.04 LTS focal
Needs evaluation
18.04 LTS bionic
Needs evaluation
16.04 LTS xenial
Needs evaluation
14.04 LTS trusty
Needs evaluation

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Notes

mdeslaur

On focal and earlier, the python-pip package bundles python-idna binaries when built. After updating python-idna, a no-change rebuild of python-pip is required. On jammy and later, python-idna is bundled in the python-pip package and needs to be patched.

Patch details

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

Package Patch details
python-idna

Severity score breakdown

Parameter Value
Base score 7.5 · High
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Scope Unchanged
Confidentiality None
Integrity impact None
Availability impact High
Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

References

Related Ubuntu Security Notices (USN)

Other references