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Ubuntu Security Notice USN-6754-2
May 07, 2024

nghttp2 vulnerability
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A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 24.04 LTS

Summary:

Several security issues were fixed in nghttp2.

Software Description:
- 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 LTS
   libnghttp2-14                   1.59.0-1ubuntu0.1
   nghttp2                         1.59.0-1ubuntu0.1
   nghttp2-client                  1.59.0-1ubuntu0.1
   nghttp2-proxy                   1.59.0-1ubuntu0.1
   nghttp2-server                  1.59.0-1ubuntu0.1

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

References:
   https://ubuntu.com/security/notices/USN-6754-2
   https://ubuntu.com/security/notices/USN-6754-1
   CVE-2024-28182

Package Information:
   https://launchpad.net/ubuntu/+source/nghttp2/1.59.0-1ubuntu0.1