UBUNTU-CVE-2025-61921

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Source
https://ubuntu.com/security/CVE-2025-61921
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-61921.json
JSON Data
https://api.test.osv.dev/v1/vulns/UBUNTU-CVE-2025-61921
Upstream
Published
2025-10-10T20:15:00Z
Modified
2025-11-04T05:28:40Z
Severity
  • 2.7 (Low) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U CVSS Calculator
  • 7.5 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
  • Ubuntu - medium
Summary
[none]
Details

Sinatra is a domain-specific language for creating web applications in Ruby. In versions prior to 4.2.0, there is a denial of service vulnerability in the If-Match and If-None-Match header parsing component of Sinatra, if the etag method is used when constructing the response. Carefully crafted input can cause If-Match and If-None-Match header parsing in Sinatra to take an unexpected amount of time, possibly resulting in a denial of service attack vector. This header is typically involved in generating the ETag header value. Any applications that use the etag method when generating a response are impacted. Version 4.2.0 fixes the issue.

References

Affected packages

Ubuntu:22.04:LTS

ruby-sinatra

Package

Name
ruby-sinatra
Purl
pkg:deb/ubuntu/ruby-sinatra@2.0.8.1-2+deb11u1build0.22.04.1?arch=source&distro=jammy

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

2.*

2.0.8.1-2
2.0.8.1-2+deb11u1build0.22.04.1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "ruby-rack-protection",
            "binary_version": "2.0.8.1-2+deb11u1build0.22.04.1"
        },
        {
            "binary_name": "ruby-sinatra",
            "binary_version": "2.0.8.1-2+deb11u1build0.22.04.1"
        },
        {
            "binary_name": "ruby-sinatra-contrib",
            "binary_version": "2.0.8.1-2+deb11u1build0.22.04.1"
        }
    ]
}

Ubuntu:24.04:LTS

ruby-sinatra

Package

Name
ruby-sinatra
Purl
pkg:deb/ubuntu/ruby-sinatra@3.0.5-3ubuntu1?arch=source&distro=noble

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

3.*

3.0.5-3
3.0.5-3ubuntu1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "ruby-rack-protection",
            "binary_version": "3.0.5-3ubuntu1"
        },
        {
            "binary_name": "ruby-sinatra",
            "binary_version": "3.0.5-3ubuntu1"
        },
        {
            "binary_name": "ruby-sinatra-contrib",
            "binary_version": "3.0.5-3ubuntu1"
        }
    ]
}

Ubuntu:25.04

ruby-sinatra

Package

Name
ruby-sinatra
Purl
pkg:deb/ubuntu/ruby-sinatra@3.2.0-1?arch=source&distro=plucky

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

3.*

3.0.5-3ubuntu1
3.2.0-1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "ruby-rack-protection",
            "binary_version": "3.2.0-1"
        },
        {
            "binary_name": "ruby-sinatra",
            "binary_version": "3.2.0-1"
        },
        {
            "binary_name": "ruby-sinatra-contrib",
            "binary_version": "3.2.0-1"
        }
    ]
}

Ubuntu:25.10

ruby-sinatra

Package

Name
ruby-sinatra
Purl
pkg:deb/ubuntu/ruby-sinatra@4.1.1-5?arch=source&distro=questing

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

3.*

3.2.0-1

4.*

4.1.1-5

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "ruby-rack-protection",
            "binary_version": "4.1.1-5"
        },
        {
            "binary_name": "ruby-sinatra",
            "binary_version": "4.1.1-5"
        },
        {
            "binary_name": "ruby-sinatra-contrib",
            "binary_version": "4.1.1-5"
        }
    ]
}

Ubuntu:Pro:16.04:LTS

ruby-sinatra

Package

Name
ruby-sinatra
Purl
pkg:deb/ubuntu/ruby-sinatra@1.4.7-3ubuntu0.1~esm2?arch=source&distro=esm-apps/xenial

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

1.*

1.4.6-2
1.4.7-3
1.4.7-3ubuntu0.1~esm2

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "ruby-sinatra",
            "binary_version": "1.4.7-3ubuntu0.1~esm2"
        }
    ]
}

Ubuntu:Pro:18.04:LTS

ruby-sinatra

Package

Name
ruby-sinatra
Purl
pkg:deb/ubuntu/ruby-sinatra@1.4.8-1ubuntu0.1~esm2?arch=source&distro=esm-apps/bionic

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

1.*

1.4.7-5
1.4.8-1
1.4.8-1ubuntu0.1~esm2

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "ruby-sinatra",
            "binary_version": "1.4.8-1ubuntu0.1~esm2"
        }
    ]
}

Ubuntu:Pro:20.04:LTS

ruby-sinatra

Package

Name
ruby-sinatra
Purl
pkg:deb/ubuntu/ruby-sinatra@2.0.8.1-1ubuntu0.1~esm2?arch=source&distro=esm-apps/focal

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

2.*

2.0.5-4ubuntu1
2.0.8.1-1
2.0.8.1-1ubuntu0.1~esm2

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "ruby-rack-protection",
            "binary_version": "2.0.8.1-1ubuntu0.1~esm2"
        },
        {
            "binary_name": "ruby-sinatra",
            "binary_version": "2.0.8.1-1ubuntu0.1~esm2"
        },
        {
            "binary_name": "ruby-sinatra-contrib",
            "binary_version": "2.0.8.1-1ubuntu0.1~esm2"
        }
    ]
}