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CVE-2021-3580

Publication date 10 June 2021

Last updated 24 July 2024


Ubuntu priority

Cvss 3 Severity Score

7.5 · High

Score breakdown

A flaw was found in the way nettle's RSA decryption functions handled specially crafted ciphertext. An attacker could use this flaw to provide a manipulated ciphertext leading to application crash and denial of service.

Read the notes from the security team

Status

Package Ubuntu Release Status
nettle 22.10 kinetic
Not affected
22.04 LTS jammy
Not affected
21.10 impish
Not affected
21.04 hirsute
Fixed 3.7-2.1ubuntu1.1
20.10 groovy
Fixed 3.6-2ubuntu0.2
20.04 LTS focal
Fixed 3.5.1+really3.5.1-2ubuntu0.2
18.04 LTS bionic
Fixed 3.4.1-0ubuntu0.18.04.1
16.04 LTS xenial Ignored change too intrusive
14.04 LTS trusty Ignored change too intrusive

Notes


mdeslaur

this fix relies on the RSA refactoring that is required to fix CVE-2018-16869, which is too intrusive to backport to older releases

Patch details

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

Package Patch details
nettle

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