nghttp2: CVSS (Max): 7.5

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AUSCERT External Security Bulletin Redistribution

ESB-2024.2854
USN-6754-2: nghttp2 vulnerability
8 May 2024

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AusCERT Security Bulletin Summary
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Product: nghttp2
Publisher: Ubuntu
Operating System: Ubuntu
Resolution: Patch/Upgrade
CVE Names: CVE-2023-44487 CVE-2024-28182 CVE-2019-9513
CVE-2019-9511

Original Bulletin:
https://ubuntu.com/security/notices/USN-6754-2

Comment: CVSS (Max): 7.5 CVE-2023-44487 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H)
CVSS Source: Red Hat, [Ubuntu]
Calculator: https://www.first.org/cvss/calculator/3.1#CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

The following are listed in the CISA Known Exploited Vulnerabilities (KEV) Catalog:
CISA KEV CVE(s): CVE-2023-44487
CISA KEV URL: https://www.cisa.gov/known-exploited-vulnerabilities-catalog

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USN-6754-2: nghttp2 vulnerability

7 May 2024

Several security issues were fixed in nghttp2.

Releases

o Ubuntu 24.04 LTS

Packages

o nghttp2 – HTTP/2 C Library and tools

Details

USN-6754-1 fixed vulnerabilities in nghttp2. This update provides the
corresponding update for Ubuntu 24.04 LTS.

Original advisory details:

It was discovered that nghttp2 incorrectly handled the HTTP/2
implementation. A remote attacker could possibly use this issue to cause
nghttp2 to consume resources, leading to a denial of service. This issue
only affected Ubuntu 16.04 LTS and Ubuntu 18.04 LTS. ( CVE-2019-9511 ,
CVE-2019-9513 )

It was discovered that nghttp2 incorrectly handled request cancellation. A
remote attacker could possibly use this issue to cause nghttp2 to consume
resources, leading to a denial of service. This issue only affected Ubuntu
16.04 LTS and Ubuntu 18.04 LTS. ( CVE-2023-44487 )

It was discovered that nghttp2 could be made to process an unlimited number
of HTTP/2 CONTINUATION frames. A remote attacker could possibly use this
issue to cause nghttp2 to consume resources, leading to a denial of
service. ( CVE-2024-28182 )

Update instructions

The problem can be corrected by updating your system to the following package
versions:

Ubuntu 24.04

o libnghttp2-14 – 1.59.0-1ubuntu0.1
o nghttp2 – 1.59.0-1ubuntu0.1
o nghttp2-client – 1.59.0-1ubuntu0.1
o nghttp2-proxy – 1.59.0-1ubuntu0.1
o nghttp2-server – 1.59.0-1ubuntu0.1

In general, a standard system update will make all the necessary changes.

References

o CVE-2024-28182

Related notices

o USN-6754-1 : nghttp2-server, libnghttp2-dev, nghttp2, libnghttp2-doc,
libnghttp2-14, nghttp2-client, nghttp2-proxy

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