UBUNTU-CVE-2021-41819

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Source
https://ubuntu.com/security/CVE-2021-41819
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-41819.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2021-41819
Upstream
Downstream
Related
Published
2022-01-01T06:15:00Z
Modified
2025-09-08T16:47:22Z
Severity
  • 7.5 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N CVSS Calculator
  • 7.5 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N CVSS Calculator
  • Ubuntu - medium
Summary
[none]
Details

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.

References

Affected packages

Ubuntu:Pro:16.04:LTS / ruby2.3

Package

Name
ruby2.3
Purl
pkg:deb/ubuntu/ruby2.3@2.3.1-2~ubuntu16.04.16+esm2?arch=source&distro=esm-infra/xenial

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
2.3.1-2~ubuntu16.04.16+esm2

Affected versions

2.*

2.3.0-1
2.3.0-2
2.3.0-4ubuntu2
2.3.0-4ubuntu3
2.3.0-5ubuntu1
2.3.1-2~16.04
2.3.1-2~16.04.2
2.3.1-2~16.04.4
2.3.1-2~16.04.5
2.3.1-2~16.04.6
2.3.1-2~16.04.7
2.3.1-2~16.04.9
2.3.1-2~16.04.10
2.3.1-2~16.04.11
2.3.1-2~16.04.12
2.3.1-2~ubuntu16.04.13
2.3.1-2~ubuntu16.04.14
2.3.1-2~ubuntu16.04.15
2.3.1-2~ubuntu16.04.16
2.3.1-2~ubuntu16.04.16+esm1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "2.3.1-2~ubuntu16.04.16+esm2",
            "binary_name": "libruby2.3"
        },
        {
            "binary_version": "2.3.1-2~ubuntu16.04.16+esm2",
            "binary_name": "ruby2.3"
        },
        {
            "binary_version": "2.3.1-2~ubuntu16.04.16+esm2",
            "binary_name": "ruby2.3-dev"
        },
        {
            "binary_version": "2.3.1-2~ubuntu16.04.16+esm2",
            "binary_name": "ruby2.3-tcltk"
        }
    ],
    "availability": "Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro"
}

Ubuntu:18.04:LTS / ruby2.5

Package

Name
ruby2.5
Purl
pkg:deb/ubuntu/ruby2.5@2.5.1-1ubuntu1.11?arch=source&distro=bionic

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
2.5.1-1ubuntu1.11

Affected versions

2.*

2.5.0~preview1-1ubuntu2
2.5.0-4ubuntu1
2.5.0-4ubuntu4
2.5.0-5ubuntu1
2.5.0-6ubuntu1
2.5.1-1ubuntu1
2.5.1-1ubuntu1.1
2.5.1-1ubuntu1.2
2.5.1-1ubuntu1.4
2.5.1-1ubuntu1.5
2.5.1-1ubuntu1.6
2.5.1-1ubuntu1.7
2.5.1-1ubuntu1.8
2.5.1-1ubuntu1.9
2.5.1-1ubuntu1.10

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "2.5.1-1ubuntu1.11",
            "binary_name": "libruby2.5"
        },
        {
            "binary_version": "2.5.1-1ubuntu1.11",
            "binary_name": "ruby2.5"
        },
        {
            "binary_version": "2.5.1-1ubuntu1.11",
            "binary_name": "ruby2.5-dev"
        }
    ],
    "availability": "No subscription required"
}

Ubuntu:20.04:LTS / ruby2.7

Package

Name
ruby2.7
Purl
pkg:deb/ubuntu/ruby2.7@2.7.0-5ubuntu1.6?arch=source&distro=focal

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
2.7.0-5ubuntu1.6

Affected versions

2.*

2.7.0-1
2.7.0-2
2.7.0-3
2.7.0-4
2.7.0-4ubuntu1
2.7.0-5ubuntu1
2.7.0-5ubuntu1.1
2.7.0-5ubuntu1.2
2.7.0-5ubuntu1.3
2.7.0-5ubuntu1.4
2.7.0-5ubuntu1.5

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "2.7.0-5ubuntu1.6",
            "binary_name": "libruby2.7"
        },
        {
            "binary_version": "2.7.0-5ubuntu1.6",
            "binary_name": "ruby2.7"
        },
        {
            "binary_version": "2.7.0-5ubuntu1.6",
            "binary_name": "ruby2.7-dev"
        }
    ],
    "availability": "No subscription required"
}

Ubuntu:22.04:LTS / ruby3.0

Package

Name
ruby3.0
Purl
pkg:deb/ubuntu/ruby3.0@3.0.2-7ubuntu2?arch=source&distro=jammy

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
3.0.2-7ubuntu2

Affected versions

3.*

3.0.2-5ubuntu1
3.0.2-7

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "3.0.2-7ubuntu2",
            "binary_name": "libruby3.0"
        },
        {
            "binary_version": "3.0.2-7ubuntu2",
            "binary_name": "ruby3.0"
        },
        {
            "binary_version": "3.0.2-7ubuntu2",
            "binary_name": "ruby3.0-dev"
        }
    ],
    "availability": "No subscription required"
}