[USN-7715-1] nginx vulnerability

[noreply+usn-bot at canonical.com]

==========================================================================
Ubuntu Security Notice USN-7715-1
August 25, 2025

nginx vulnerability
==========================================================================

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

- Ubuntu 25.04
- Ubuntu 24.04 LTS
- Ubuntu 22.04 LTS

Summary:

nginx could be made to expose sensitive information over the
network.

Software Description:
- nginx: small, powerful, scalable web/proxy server

Details:

It was discovered that the nginx ngx_mail_smtp_module module incorrectly
handled certain memory operations when doing SMTP authentication. This
could possibly result in sensitive information being sent to the
authentication server.

Update instructions:

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

Ubuntu 25.04
  nginx                           1.26.3-2ubuntu1.2
  nginx-core                      1.26.3-2ubuntu1.2
  nginx-extras                    1.26.3-2ubuntu1.2
  nginx-full                      1.26.3-2ubuntu1.2
  nginx-light                     1.26.3-2ubuntu1.2

Ubuntu 24.04 LTS
  nginx                           1.24.0-2ubuntu7.5
  nginx-core                      1.24.0-2ubuntu7.5
  nginx-extras                    1.24.0-2ubuntu7.5
  nginx-full                      1.24.0-2ubuntu7.5
  nginx-light                     1.24.0-2ubuntu7.5

Ubuntu 22.04 LTS
  nginx                           1.18.0-6ubuntu14.7
  nginx-core                      1.18.0-6ubuntu14.7
  nginx-full                      1.18.0-6ubuntu14.7
  nginx-light                     1.18.0-6ubuntu14.7

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

References:
  https://ubuntu.com/security/notices/USN-7715-1
  CVE-2025-53859

Package Information:
  https://launchpad.net/ubuntu/+source/nginx/1.26.3-2ubuntu1.2
  https://launchpad.net/ubuntu/+source/nginx/1.24.0-2ubuntu7.5
  https://launchpad.net/ubuntu/+source/nginx/1.18.0-6ubuntu14.7
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