==========================================================================
Ubuntu Security Notice USN-6505-1
November 22, 2023
nghttp2 vulnerability
==========================================================================
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 23.10
- Ubuntu 23.04
- Ubuntu 22.04 LTS
- Ubuntu 20.04 LTS
Summary:
nghttp2 could be made to consume resources if it received specially crafted
network traffic.
Software Description:
- nghttp2: HTTP/2 C Library and tools
Details:
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.
Update instructions:
The problem can be corrected by updating your system to the following
package versions:
Ubuntu 23.10:
   libnghttp2-14                   1.55.1-1ubuntu0.1
   nghttp2                         1.55.1-1ubuntu0.1
   nghttp2-client                  1.55.1-1ubuntu0.1
   nghttp2-proxy                   1.55.1-1ubuntu0.1
   nghttp2-server                  1.55.1-1ubuntu0.1
Ubuntu 23.04:
   libnghttp2-14                   1.52.0-1ubuntu0.1
   nghttp2                         1.52.0-1ubuntu0.1
   nghttp2-client                  1.52.0-1ubuntu0.1
   nghttp2-proxy                   1.52.0-1ubuntu0.1
   nghttp2-server                  1.52.0-1ubuntu0.1
Ubuntu 22.04 LTS:
   libnghttp2-14                   1.43.0-1ubuntu0.1
   nghttp2                         1.43.0-1ubuntu0.1
   nghttp2-client                  1.43.0-1ubuntu0.1
   nghttp2-proxy                   1.43.0-1ubuntu0.1
   nghttp2-server                  1.43.0-1ubuntu0.1
Ubuntu 20.04 LTS:
   libnghttp2-14                   1.40.0-1ubuntu0.2
   nghttp2                         1.40.0-1ubuntu0.2
   nghttp2-client                  1.40.0-1ubuntu0.2
   nghttp2-proxy                   1.40.0-1ubuntu0.2
   nghttp2-server                  1.40.0-1ubuntu0.2
In general, a standard system update will make all the necessary changes.
References:
   https://ubuntu.com/security/notices/USN-6505-1
   CVE-2023-44487
Package Information:
   https://launchpad.net/ubuntu/+source/nghttp2/1.55.1-1ubuntu0.1
   https://launchpad.net/ubuntu/+source/nghttp2/1.52.0-1ubuntu0.1
   https://launchpad.net/ubuntu/+source/nghttp2/1.43.0-1ubuntu0.1
   https://launchpad.net/ubuntu/+source/nghttp2/1.40.0-1ubuntu0.2