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Ubuntu 24.04 LTS: USN-7285-2 severe: nginx client cert bypass

ubuntu
Calendar Grey April 1, 2025
Dist Ubuntu Esm H88
The Ubuntu 24.04 LTS version of nginx presents a vulnerability related to authentication bypass, demanding prompt updates to alleviate potential security threats.
nginx could be made to bypass client certificate authentication requirements.

Summary

nginx could be made to bypass client certificate authentication

requirements.

Software Description:

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

Details:

USN-7285-1 fixed vulnerabilities in nginx.

This update provides the corresponding updates for Ubuntu 24.04 LTS.

Original advisory details:

It was discovered that nginx incorrectly handled when multiple

server blocks are configured to share the same IP address and port.

An attacker could use this issue to use session resumption to bypass

client certificate authentication requirements on these servers.

Topics%20covered

Topics Covered

security advisory Ubuntu issue authentication session management nginx

Update Instructions

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

Ubuntu 24.04 LTS
  nginx                           1.24.0-2ubuntu7.3
  nginx-common                    1.24.0-2ubuntu7.3
  nginx-core                      1.24.0-2ubuntu7.3
  nginx-extras                    1.24.0-2ubuntu7.3
  nginx-full                      1.24.0-2ubuntu7.3
  nginx-light                     1.24.0-2ubuntu7.3

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

References

https://ubuntu.com/security/notices/USN-7285-2

https://ubuntu.com/security/notices/USN-7285-1

CVE-2025-23419

Severity
critical
Lowest
Low
Medium
High
Critical

Ubuntu Security Notice USN-7285-2

Topics%20covered

Topics Covered

security advisory Ubuntu issue authentication session management nginx

Package Information

https://launchpad.net/ubuntu/+source/nginx/1.24.0-2ubuntu7.3

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