=========================================================================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