A nghttp2 security update has been released for Ubuntu Linux 16.04 LTS, 18.04 LTS, and 20.04 LTS.

[USN-6142-1] nghttp2 vulnerability

==========================================================================
Ubuntu Security Notice USN-6142-1
June 06, 2023

nghttp2 vulnerability
==========================================================================

A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 20.04 LTS
- Ubuntu 18.04 LTS (Available with Ubuntu Pro)
- Ubuntu 16.04 LTS (Available with Ubuntu Pro)

Summary:

nghttp2 could be made to crash if it opened a specially crafted file.

Software Description:
- nghttp2: HTTP/2 C Library and tools

Details:

Gal Goldshtein discovered that nghttp2 incorrectly handled certain inputs. If
a user or an automated system were tricked into opening a specially crafted
input file, a remote attacker could possibly use this issue to cause a
denial of service.

Update instructions:

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

Ubuntu 20.04 LTS:
libnghttp2-14 1.40.0-1ubuntu0.1
libnghttp2-dev 1.40.0-1ubuntu0.1
nghttp2 1.40.0-1ubuntu0.1
nghttp2-client 1.40.0-1ubuntu0.1
nghttp2-proxy 1.40.0-1ubuntu0.1
nghttp2-server 1.40.0-1ubuntu0.1

Ubuntu 18.04 LTS (Available with Ubuntu Pro):
libnghttp2-14 1.30.0-1ubuntu1+esm1
libnghttp2-dev 1.30.0-1ubuntu1+esm1
nghttp2 1.30.0-1ubuntu1+esm1
nghttp2-client 1.30.0-1ubuntu1+esm1
nghttp2-proxy 1.30.0-1ubuntu1+esm1
nghttp2-server 1.30.0-1ubuntu1+esm1

Ubuntu 16.04 LTS (Available with Ubuntu Pro):
libnghttp2-14 1.7.1-1ubuntu0.1~esm1
libnghttp2-dev 1.7.1-1ubuntu0.1~esm1
nghttp2 1.7.1-1ubuntu0.1~esm1
nghttp2-client 1.7.1-1ubuntu0.1~esm1
nghttp2-proxy 1.7.1-1ubuntu0.1~esm1
nghttp2-server 1.7.1-1ubuntu0.1~esm1

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

References:
https://ubuntu.com/security/notices/USN-6142-1
CVE-2020-11080

Package Information:
https://launchpad.net/ubuntu/+source/nghttp2/1.40.0-1ubuntu0.1