UBUNTU-CVE-2025-61770

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Source
https://ubuntu.com/security/CVE-2025-61770
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-61770.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2025-61770
Upstream
Published
2025-10-07T15:16:00Z
Modified
2025-10-10T15:30:19Z
Severity
  • 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

Rack is a modular Ruby web server interface. In versions prior to 2.2.19, 3.1.17, and 3.2.2, Rack::Multipart::Parser buffers the entire multipart preamble (bytes before the first boundary) in memory without any size limit. A client can send a large preamble followed by a valid boundary, causing significant memory use and potential process termination due to out-of-memory (OOM) conditions. Remote attackers can trigger large transient memory spikes by including a long preamble in multipart/form-data requests. The impact scales with allowed request sizes and concurrency, potentially causing worker crashes or severe slowdown due to garbage collection. Versions 2.2.19, 3.1.17, and 3.2.2 enforce a preamble size limit (e.g., 16 KiB) or discard preamble data entirely. Workarounds include limiting total request body size at the proxy or web server level and monitoring memory and set per-process limits to prevent OOM conditions.

References

Affected packages

Ubuntu:22.04:LTS

ruby-rack

Package

Name
ruby-rack
Purl
pkg:deb/ubuntu/ruby-rack@2.1.4-5ubuntu1.1?arch=source&distro=jammy

Affected ranges

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

Affected versions

2.*

2.1.4-3
2.1.4-4
2.1.4-5
2.1.4-5ubuntu1
2.1.4-5ubuntu1.1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "2.1.4-5ubuntu1.1",
            "binary_name": "ruby-rack"
        }
    ]
}

Ubuntu:24.04:LTS

ruby-rack

Package

Name
ruby-rack
Purl
pkg:deb/ubuntu/ruby-rack@2.2.7-1ubuntu0.4?arch=source&distro=noble

Affected ranges

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

Affected versions

2.*

2.2.4-3
2.2.7-1
2.2.7-1ubuntu0.1
2.2.7-1ubuntu0.2
2.2.7-1ubuntu0.3
2.2.7-1ubuntu0.4

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "2.2.7-1ubuntu0.4",
            "binary_name": "ruby-rack"
        }
    ]
}

Ubuntu:25.04

ruby-rack

Package

Name
ruby-rack
Purl
pkg:deb/ubuntu/ruby-rack@2.2.7-1.1ubuntu0.25.04.3?arch=source&distro=plucky

Affected ranges

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

Affected versions

2.*

2.2.7-1.1
2.2.7-1.1ubuntu0.25.04.1
2.2.7-1.1ubuntu0.25.04.2
2.2.7-1.1ubuntu0.25.04.3

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "2.2.7-1.1ubuntu0.25.04.3",
            "binary_name": "ruby-rack"
        }
    ]
}

Ubuntu:25.10

ruby-rack

Package

Name
ruby-rack
Purl
pkg:deb/ubuntu/ruby-rack@3.1.16-0.1?arch=source&distro=questing

Affected ranges

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

Affected versions

2.*

2.2.7-1.1

3.*

3.1.16-0.1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "3.1.16-0.1",
            "binary_name": "ruby-rack"
        }
    ]
}

Ubuntu:Pro:14.04:LTS

ruby-rack

Package

Name
ruby-rack
Purl
pkg:deb/ubuntu/ruby-rack@1.5.2-3+deb8u3ubuntu1~esm10?arch=source&distro=esm-infra-legacy/trusty

Affected ranges

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

Affected versions

1.*

1.5.2-1
1.5.2-1ubuntu0.1~esm1
1.5.2-3+deb8u3ubuntu1~esm2
1.5.2-3+deb8u3ubuntu1~esm3
1.5.2-3+deb8u3ubuntu1~esm4
1.5.2-3+deb8u3ubuntu1~esm6
1.5.2-3+deb8u3ubuntu1~esm7
1.5.2-3+deb8u3ubuntu1~esm8
1.5.2-3+deb8u3ubuntu1~esm9
1.5.2-3+deb8u3ubuntu1~esm10

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "1.5.2-3+deb8u3ubuntu1~esm10",
            "binary_name": "librack-ruby"
        },
        {
            "binary_version": "1.5.2-3+deb8u3ubuntu1~esm10",
            "binary_name": "librack-ruby1.8"
        },
        {
            "binary_version": "1.5.2-3+deb8u3ubuntu1~esm10",
            "binary_name": "librack-ruby1.9.1"
        },
        {
            "binary_version": "1.5.2-3+deb8u3ubuntu1~esm10",
            "binary_name": "ruby-rack"
        }
    ]
}

Ubuntu:Pro:16.04:LTS

ruby-rack

Package

Name
ruby-rack
Purl
pkg:deb/ubuntu/ruby-rack@1.6.4-3ubuntu0.2+esm8?arch=source&distro=esm-apps/xenial

Affected ranges

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

Affected versions

1.*

1.5.2-4
1.6.4-2
1.6.4-3
1.6.4-3ubuntu0.1
1.6.4-3ubuntu0.2
1.6.4-3ubuntu0.2+esm1
1.6.4-3ubuntu0.2+esm2
1.6.4-3ubuntu0.2+esm4
1.6.4-3ubuntu0.2+esm5
1.6.4-3ubuntu0.2+esm6
1.6.4-3ubuntu0.2+esm7
1.6.4-3ubuntu0.2+esm8

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "1.6.4-3ubuntu0.2+esm8",
            "binary_name": "ruby-rack"
        }
    ]
}

Ubuntu:Pro:18.04:LTS

ruby-rack

Package

Name
ruby-rack
Purl
pkg:deb/ubuntu/ruby-rack@1.6.4-4ubuntu0.2+esm8?arch=source&distro=esm-apps/bionic

Affected ranges

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

Affected versions

1.*

1.6.4-4
1.6.4-4ubuntu0.1
1.6.4-4ubuntu0.2
1.6.4-4ubuntu0.2+esm1
1.6.4-4ubuntu0.2+esm2
1.6.4-4ubuntu0.2+esm4
1.6.4-4ubuntu0.2+esm5
1.6.4-4ubuntu0.2+esm6
1.6.4-4ubuntu0.2+esm7
1.6.4-4ubuntu0.2+esm8

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "1.6.4-4ubuntu0.2+esm8",
            "binary_name": "ruby-rack"
        }
    ]
}

Ubuntu:Pro:20.04:LTS

ruby-rack

Package

Name
ruby-rack
Purl
pkg:deb/ubuntu/ruby-rack@2.0.7-2ubuntu0.1+esm7?arch=source&distro=esm-apps/focal

Affected ranges

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

Affected versions

2.*

2.0.6-3
2.0.7-2
2.0.7-2ubuntu0.1
2.0.7-2ubuntu0.1+esm1
2.0.7-2ubuntu0.1+esm2
2.0.7-2ubuntu0.1+esm3
2.0.7-2ubuntu0.1+esm4
2.0.7-2ubuntu0.1+esm5
2.0.7-2ubuntu0.1+esm6
2.0.7-2ubuntu0.1+esm7

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "2.0.7-2ubuntu0.1+esm7",
            "binary_name": "ruby-rack"
        }
    ]
}