CVE-2021-41819

Publication date 1 January 2022

Last updated 25 August 2025

Ubuntu priority

Medium

Why this priority?

Cvss 3 Severity Score

7.5 · High

Score breakdown

Description

CGI::Cookie.parse in Ruby through 2.6.8 mishandles security prefixes in cookie names. This also affects the CGI gem through 0.3.0 for Ruby.

Status

Package Ubuntu Release Status
ruby2.3 16.04 LTS xenial
Fixed 2.3.1-2~ubuntu16.04.16+esm2
14.04 LTS trusty Ignored end of standard support
ruby2.5 18.04 LTS bionic
Fixed 2.5.1-1ubuntu1.11
16.04 LTS xenial Ignored end of standard support
14.04 LTS trusty Ignored end of standard support
ruby2.7 21.10 impish
Fixed 2.7.4-1ubuntu3.1
21.04 hirsute
Fixed 2.7.2-4ubuntu1.3
20.04 LTS focal
Fixed 2.7.0-5ubuntu1.6
16.04 LTS xenial Ignored end of standard support
14.04 LTS trusty Ignored end of standard support
ruby3.0 22.04 LTS jammy
Fixed 3.0.2-7ubuntu2
16.04 LTS xenial Ignored end of standard support
14.04 LTS trusty Ignored end of standard support

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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 High
Availability impact None
Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

References

Related Ubuntu Security Notices (USN)

Other references