UBUNTU-CVE-2025-9784

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Source
https://ubuntu.com/security/CVE-2025-9784
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-9784.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2025-9784
Upstream
Published
2025-09-02T14:15:00Z
Modified
2026-01-20T19:17:24.918398Z
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

A flaw was found in Undertow where malformed client requests can trigger server-side stream resets without triggering abuse counters. This issue, referred to as the "MadeYouReset" attack, allows malicious clients to induce excessive server workload by repeatedly causing server-side stream aborts. While not a protocol bug, this highlights a common implementation weakness that can be exploited to cause a denial of service (DoS).

References

Affected packages

Ubuntu:16.04:LTS

undertow

Package

Name
undertow
Purl
pkg:deb/ubuntu/undertow@1.3.16-1?arch=source&distro=xenial

Affected ranges

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

Affected versions

1.*

1.3.4-1
1.3.5-1
1.3.7-1
1.3.11-1
1.3.16-1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "libundertow-java",
            "binary_version": "1.3.16-1"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-9784.json"

Ubuntu:18.04:LTS

undertow

Package

Name
undertow
Purl
pkg:deb/ubuntu/undertow@1.4.23-3?arch=source&distro=bionic

Affected ranges

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

Affected versions

1.*

1.4.20-1
1.4.21-1
1.4.22-1
1.4.23-1
1.4.23-2build1
1.4.23-3

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "libundertow-java",
            "binary_version": "1.4.23-3"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-9784.json"

Ubuntu:20.04:LTS

undertow

Package

Name
undertow
Purl
pkg:deb/ubuntu/undertow@2.0.29-1?arch=source&distro=focal

Affected ranges

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

Affected versions

2.*

2.0.23-1
2.0.27-1
2.0.28-1
2.0.29-1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "libundertow-java",
            "binary_version": "2.0.29-1"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-9784.json"

Ubuntu:22.04:LTS

undertow

Package

Name
undertow
Purl
pkg:deb/ubuntu/undertow@2.2.16-1?arch=source&distro=jammy

Affected ranges

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

Affected versions

2.*

2.2.8-1
2.2.12-1
2.2.13-1
2.2.14-1
2.2.16-1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "libundertow-java",
            "binary_version": "2.2.16-1"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-9784.json"

Ubuntu:24.04:LTS

undertow

Package

Name
undertow
Purl
pkg:deb/ubuntu/undertow@2.3.8-2?arch=source&distro=noble

Affected ranges

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

Affected versions

2.*

2.3.8-2

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "libundertow-java",
            "binary_version": "2.3.8-2"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-9784.json"

Ubuntu:25.10

resteasy

Package

Name
resteasy
Purl
pkg:deb/ubuntu/resteasy@3.6.2-3?arch=source&distro=questing

Affected ranges

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

Affected versions

3.*

3.6.2-3

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "libresteasy-java",
            "binary_version": "3.6.2-3"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-9784.json"

undertow

Package

Name
undertow
Purl
pkg:deb/ubuntu/undertow@2.3.18-2?arch=source&distro=questing

Affected ranges

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

Affected versions

2.*

2.3.18-1
2.3.18-2

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "libundertow-java",
            "binary_version": "2.3.18-2"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-9784.json"

Ubuntu:Pro:16.04:LTS

resteasy

Package

Name
resteasy
Purl
pkg:deb/ubuntu/resteasy@3.0.6-3ubuntu0.1~esm1?arch=source&distro=esm-apps/xenial

Affected ranges

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

Affected versions

3.*

3.0.6-3
3.0.6-3ubuntu0.1~esm1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "libresteasy-java",
            "binary_version": "3.0.6-3ubuntu0.1~esm1"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-9784.json"

Ubuntu:Pro:20.04:LTS

resteasy

Package

Name
resteasy
Purl
pkg:deb/ubuntu/resteasy@3.6.2-2ubuntu0.20.04.1~esm1?arch=source&distro=esm-apps/focal

Affected ranges

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

Affected versions

3.*

3.6.2-2
3.6.2-2ubuntu0.20.04.1~esm1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "libresteasy-java",
            "binary_version": "3.6.2-2ubuntu0.20.04.1~esm1"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-9784.json"

Ubuntu:Pro:22.04:LTS

resteasy

Package

Name
resteasy
Purl
pkg:deb/ubuntu/resteasy@3.6.2-2ubuntu0.22.04.1~esm1?arch=source&distro=esm-apps/jammy

Affected ranges

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

Affected versions

3.*

3.6.2-2
3.6.2-2ubuntu0.22.04.1~esm1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "libresteasy-java",
            "binary_version": "3.6.2-2ubuntu0.22.04.1~esm1"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-9784.json"

Ubuntu:Pro:24.04:LTS

resteasy

Package

Name
resteasy
Purl
pkg:deb/ubuntu/resteasy@3.6.2-2ubuntu0.24.04.1~esm1?arch=source&distro=esm-apps/noble

Affected ranges

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

Affected versions

3.*

3.6.2-2
3.6.2-2ubuntu0.24.04.1~esm1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "libresteasy-java",
            "binary_version": "3.6.2-2ubuntu0.24.04.1~esm1"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-9784.json"