CVE-2023-44487

Publication date 10 October 2023

Last updated 28 April 2025

Ubuntu priority

High

Why this priority?

Cvss 3 Severity Score

7.5 · High

Score breakdown

The HTTP/2 protocol allows a denial of service (server resource consumption) because request cancellation can reset many streams quickly, as exploited in the wild in August through October 2023.

Read the notes from the security team

Why is this CVE high priority?

Listed in CISA Known Exploited Vulnerabilities Catalog

Learn more about Ubuntu priority

Status

Package Ubuntu Release Status
dotnet6 25.04 plucky Not in release
24.10 oracular Not in release
24.04 LTS noble Not in release
23.10 mantic
Fixed 6.0.123-0ubuntu1
23.04 lunar
Fixed 6.0.123-0ubuntu1~23.04.1
22.04 LTS jammy
Fixed 6.0.123-0ubuntu1~22.04.1
20.04 LTS focal Not in release
18.04 LTS bionic Not in release
16.04 LTS xenial Not in release
14.04 LTS trusty Not in release
dotnet7 25.04 plucky Not in release
24.10 oracular Not in release
24.04 LTS noble Not in release
23.10 mantic
Fixed 7.0.112-0ubuntu1
23.04 lunar
Fixed 7.0.112-0ubuntu1~23.04.1
22.04 LTS jammy
Fixed 7.0.112-0ubuntu1~22.04.1
20.04 LTS focal Not in release
18.04 LTS bionic Not in release
16.04 LTS xenial Not in release
14.04 LTS trusty Not in release
dotnet8 25.04 plucky
Fixed 8.0.100-8.0.0-0ubuntu1
24.10 oracular
Fixed 8.0.100-8.0.0-0ubuntu1
24.04 LTS noble
Fixed 8.0.100-8.0.0-0ubuntu1
23.10 mantic
Fixed 8.0.100-8.0.0~rc2-0ubuntu1
23.04 lunar Not in release
22.04 LTS jammy
Not affected
20.04 LTS focal Not in release
18.04 LTS bionic Not in release
16.04 LTS xenial Not in release
14.04 LTS trusty Not in release
h2o 25.04 plucky
Not affected
24.10 oracular
Not affected
24.04 LTS noble
Not affected
23.10 mantic Ignored end of life, was needs-triage
23.04 lunar Ignored end of life, was needs-triage
22.04 LTS jammy
Not affected
20.04 LTS focal
Not affected
18.04 LTS bionic
Vulnerable
16.04 LTS xenial Not in release
14.04 LTS trusty Not in release
haproxy 25.04 plucky
Not affected
24.10 oracular
Not affected
24.04 LTS noble
Not affected
23.10 mantic
Not affected
23.04 lunar
Not affected
22.04 LTS jammy
Not affected
20.04 LTS focal
Not affected
18.04 LTS bionic
16.04 LTS xenial
Not affected
14.04 LTS trusty Ignored end of standard support
netty 25.04 plucky
Not affected
24.10 oracular
Not affected
24.04 LTS noble
Not affected
23.10 mantic Ignored end of life, was needed
23.04 lunar Ignored end of life, was needs-triage
22.10 kinetic Ignored end of life, was needs-triage
22.04 LTS jammy
Fixed 1:4.1.48-4+deb11u2build0.22.04.1
20.04 LTS focal
Fixed 1:4.1.45-1ubuntu0.2
18.04 LTS bionic
Not affected
16.04 LTS xenial
Not affected
14.04 LTS trusty
Not affected
nghttp2 25.04 plucky
Not affected
24.10 oracular
Not affected
24.04 LTS noble
Not affected
23.10 mantic
Fixed 1.55.1-1ubuntu0.1
23.04 lunar
Fixed 1.52.0-1ubuntu0.1
22.04 LTS jammy
Fixed 1.43.0-1ubuntu0.1
20.04 LTS focal
Fixed 1.40.0-1ubuntu0.2
18.04 LTS bionic
16.04 LTS xenial
14.04 LTS trusty Ignored end of standard support
nginx 25.04 plucky
Not affected
24.10 oracular
Not affected
24.04 LTS noble
Not affected
23.10 mantic
Not affected
23.04 lunar
Not affected
22.04 LTS jammy
Not affected
20.04 LTS focal
Not affected
18.04 LTS bionic
Not affected
16.04 LTS xenial
Not affected
14.04 LTS trusty
Not affected
nodejs 25.04 plucky
Not affected
24.10 oracular
Not affected
24.04 LTS noble
Not affected
23.10 mantic Ignored end of life, was needs-triage
23.04 lunar Ignored end of life, was needs-triage
22.04 LTS jammy
Vulnerable
20.04 LTS focal
Vulnerable
18.04 LTS bionic
Vulnerable
16.04 LTS xenial
Not affected
14.04 LTS trusty
Not affected
tomcat10 25.04 plucky
Not affected
24.10 oracular
Not affected
24.04 LTS noble
Not affected
23.10 mantic Ignored end of life, was needs-triage
23.04 lunar Ignored end of life, was needs-triage
22.04 LTS jammy Not in release
20.04 LTS focal Not in release
18.04 LTS bionic Ignored end of standard support
16.04 LTS xenial Ignored end of standard support
14.04 LTS trusty Ignored end of standard support
tomcat8 25.04 plucky Not in release
24.10 oracular Not in release
24.04 LTS noble Not in release
23.10 mantic Not in release
23.04 lunar Not in release
22.04 LTS jammy Not in release
20.04 LTS focal Not in release
18.04 LTS bionic
16.04 LTS xenial
Not affected
14.04 LTS trusty Not in release
tomcat9 25.04 plucky
Not affected
24.10 oracular
Not affected
24.04 LTS noble
Not affected
23.10 mantic Ignored end of life, was needs-triage
23.04 lunar Ignored end of life, was needs-triage
22.04 LTS jammy
Fixed 9.0.58-1ubuntu0.2
20.04 LTS focal
Fixed 9.0.31-1ubuntu0.9
18.04 LTS bionic
16.04 LTS xenial Ignored end of standard support
14.04 LTS trusty Ignored end of standard support
trafficserver 25.04 plucky
Not affected
24.10 oracular
Not affected
24.04 LTS noble
Not affected
23.10 mantic Ignored end of life, was needs-triage
23.04 lunar Ignored end of life, was needs-triage
22.04 LTS jammy
20.04 LTS focal
18.04 LTS bionic
Not affected
16.04 LTS xenial
Not affected
14.04 LTS trusty Ignored end of standard support

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Notes

mdeslaur

The nginx developers do not consider nginx to be affected by this issue due to the default configuration restricting the number of requests per connectiong (keepalive_requests). They did provide a patch to harden nginx even further in environments where the default are substantially modified. haproxy was fixed in 2018 by the commit listed below Debian’s tomcat9 update caused a regression, investigate before fixing tomcat packages.

ccdm94

see https://mailman.nginx.org/pipermail/nginx-devel/2023-October/S36Q5HBXR7CAIMPLLPRSSSYR4PCMWILK.html for more information on nginx developer’s position regarding this CVE.

leosilva

for haproxy xenial/esm-infra there is no source affected

mdeslaur

CVE-2023-39325 is the CVE assigned specifically for golang packages

gianz

Starting with 9.0.70-2 src:tomcat9 no longer ships the server stack, so versions greater than that are not vulnerable.

john-breton

Per apache, tomcat8 vulnerable versions are 8.5.0 to 8.5.93. Per apache, trafficserver is only vulnerable in 8.0.0 to 8.1.8 and 9.0.0 to 9.2.2. Earlier versions are not affected. Debian fixed h2o in 2.2.5+dfsg2-2 The vulnerability in NodeJS is within nghttp2, need to migrate the fix over. Further the dep for nghttp2 was only added to NodeJS after 4.x.x.

Patch details

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

Package Patch details
h2o
haproxy
nghttp2
nginx
nodejs
tomcat10
tomcat8
tomcat9
trafficserver

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

References

Related Ubuntu Security Notices (USN)

Other references