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CVE-2019-9511

Publication date 13 August 2019

Last updated 24 July 2024

Ubuntu priority

Medium

Why this priority?

Cvss 3 Severity Score

7.5 · High

Score breakdown

Some HTTP/2 implementations are vulnerable to window size manipulation and stream prioritization manipulation, potentially leading to a denial of service. The attacker requests a large amount of data from a specified resource over multiple streams. They manipulate window size and stream priority to force the server to queue the data in 1-byte chunks. Depending on how efficiently this data is queued, this can consume excess CPU, memory, or both.

Read the notes from the security team

Status

Package Ubuntu Release Status
nghttp2 24.04 LTS noble
Not affected
23.10 mantic
Not affected
23.04 lunar
Not affected
22.10 kinetic
Not affected
22.04 LTS jammy
Not affected
21.10 impish
Not affected
21.04 hirsute
Not affected
20.10 groovy
Not affected
20.04 LTS focal
Not affected
19.10 eoan
Not affected
19.04 disco Ignored end of life
18.10 cosmic Ignored end of life
18.04 LTS bionic
16.04 LTS xenial
14.04 LTS trusty Not in release
nginx 24.04 LTS noble
Fixed 1.16.1-0ubuntu1
23.10 mantic
Fixed 1.16.1-0ubuntu1
23.04 lunar
Fixed 1.16.1-0ubuntu1
22.10 kinetic
Fixed 1.16.1-0ubuntu1
22.04 LTS jammy
Fixed 1.16.1-0ubuntu1
21.10 impish
Fixed 1.16.1-0ubuntu1
21.04 hirsute
Fixed 1.16.1-0ubuntu1
20.10 groovy
Fixed 1.16.1-0ubuntu1
20.04 LTS focal
Fixed 1.16.1-0ubuntu1
19.10 eoan
Fixed 1.16.1-0ubuntu1
19.04 disco
Fixed 1.15.9-0ubuntu1.1
18.10 cosmic Ignored end of life
18.04 LTS bionic
Fixed 1.14.0-0ubuntu1.4
16.04 LTS xenial
Fixed 1.10.3-0ubuntu0.16.04.4
14.04 LTS trusty
Not affected
nodejs 24.04 LTS noble
Not affected
23.10 mantic
Not affected
23.04 lunar
Not affected
22.10 kinetic Ignored end of life, was needs-triage
22.04 LTS jammy
Not affected
21.10 impish Ignored end of life
21.04 hirsute Ignored end of life
20.10 groovy Ignored end of life
20.04 LTS focal
Not affected
18.04 LTS bionic Ignored changes too intrusive
16.04 LTS xenial Ignored changes too intrusive
14.04 LTS trusty Ignored changes too intrusive

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Notes

sbeattie

nginx added http2 support in 1.9.5 nghttp2: nghttpd and nghttp are affected, libnghttp2 is not

mdeslaur

nghttp2-server is in universe

sahnaseredini

nodejs patch is a version upgrade

Patch details

For informational purposes only. We recommend not to cherry-pick updates. How can I get the fixes?

Package Patch details
nginx

Severity score breakdown

Parameter Value
Base score 7.5 · High
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Scope Unchanged
Confidentiality None
Integrity impact None
Availability impact High
Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H