UBUNTU-CVE-2019-9518

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Source
https://ubuntu.com/security/CVE-2019-9518
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2019/UBUNTU-CVE-2019-9518.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2019-9518
Upstream
Downstream
Related
Published
2019-08-13T00:00:00Z
Modified
2025-09-08T16:45:20Z
Severity
  • 7.5 (High) CVSS_V3 - CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H 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

Some HTTP/2 implementations are vulnerable to a flood of empty frames, potentially leading to a denial of service. The attacker sends a stream of frames with an empty payload and without the end-of-stream flag. These frames can be DATA, HEADERS, CONTINUATION and/or PUSH_PROMISE. The peer spends time processing each frame disproportionate to attack bandwidth. This can consume excess CPU.

References

Affected packages

Ubuntu:Pro:16.04:LTS / trafficserver

Package

Name
trafficserver
Purl
pkg:deb/ubuntu/trafficserver@5.3.0-2ubuntu2?arch=source&distro=esm-apps/xenial

Affected ranges

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

Affected versions

5.*

5.3.0-2ubuntu1
5.3.0-2ubuntu2

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "5.3.0-2ubuntu2",
            "binary_name": "trafficserver"
        },
        {
            "binary_version": "5.3.0-2ubuntu2",
            "binary_name": "trafficserver-dev"
        },
        {
            "binary_version": "5.3.0-2ubuntu2",
            "binary_name": "trafficserver-experimental-plugins"
        }
    ]
}

Ubuntu:Pro:18.04:LTS / netty

Package

Name
netty
Purl
pkg:deb/ubuntu/netty@1:4.1.7-4ubuntu0.1+esm1?arch=source&distro=esm-apps/bionic

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
1:4.1.7-4ubuntu0.1+esm1

Affected versions

1:4.*

1:4.1.7-4
1:4.1.7-4ubuntu0.1~esm1
1:4.1.7-4ubuntu0.1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "1:4.1.7-4ubuntu0.1+esm1",
            "binary_name": "libnetty-java"
        }
    ],
    "availability": "Available with Ubuntu Pro: https://ubuntu.com/pro"
}

Ubuntu:Pro:18.04:LTS / trafficserver

Package

Name
trafficserver
Purl
pkg:deb/ubuntu/trafficserver@7.1.2+ds-3?arch=source&distro=esm-apps/bionic

Affected ranges

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

Affected versions

7.*

7.0.0-5
7.1.2+ds-2
7.1.2+ds-2build1
7.1.2+ds-3

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "7.1.2+ds-3",
            "binary_name": "trafficserver"
        },
        {
            "binary_version": "7.1.2+ds-3",
            "binary_name": "trafficserver-dev"
        },
        {
            "binary_version": "7.1.2+ds-3",
            "binary_name": "trafficserver-experimental-plugins"
        }
    ]
}

Ubuntu:22.04:LTS / trafficserver

Package

Name
trafficserver
Purl
pkg:deb/ubuntu/trafficserver@9.1.1+ds-2build1?arch=source&distro=jammy

Affected ranges

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

Affected versions

8.*

8.1.1+ds-1.1

9.*

9.1.1+ds-2build1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "9.1.1+ds-2build1",
            "binary_name": "trafficserver"
        },
        {
            "binary_version": "9.1.1+ds-2build1",
            "binary_name": "trafficserver-dev"
        },
        {
            "binary_version": "9.1.1+ds-2build1",
            "binary_name": "trafficserver-experimental-plugins"
        }
    ]
}

Ubuntu:24.04:LTS / trafficserver

Package

Name
trafficserver
Purl
pkg:deb/ubuntu/trafficserver@9.2.3+ds-1+deb12u1build4?arch=source&distro=noble

Affected ranges

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

Affected versions

9.*

9.2.1+ds-1build1
9.2.2+ds-1
9.2.3+ds-1
9.2.3+ds-1+deb12u1
9.2.3+ds-1+deb12u1build1
9.2.3+ds-1+deb12u1build3
9.2.3+ds-1+deb12u1build4

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "9.2.3+ds-1+deb12u1build4",
            "binary_name": "trafficserver"
        },
        {
            "binary_version": "9.2.3+ds-1+deb12u1build4",
            "binary_name": "trafficserver-dev"
        },
        {
            "binary_version": "9.2.3+ds-1+deb12u1build4",
            "binary_name": "trafficserver-experimental-plugins"
        }
    ]
}

Ubuntu:25.04 / trafficserver

Package

Name
trafficserver
Purl
pkg:deb/ubuntu/trafficserver@9.2.5+ds-1ubuntu1?arch=source&distro=plucky

Affected ranges

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

Affected versions

9.*

9.2.4+ds-2
9.2.5+ds-1
9.2.5+ds-1ubuntu1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "9.2.5+ds-1ubuntu1",
            "binary_name": "trafficserver"
        },
        {
            "binary_version": "9.2.5+ds-1ubuntu1",
            "binary_name": "trafficserver-dev"
        },
        {
            "binary_version": "9.2.5+ds-1ubuntu1",
            "binary_name": "trafficserver-experimental-plugins"
        }
    ]
}