Nginx Update for Ubuntu: Security Vulnerability Disclosure
A security vulnerability has been identified in the nginx web server that impacts users of Ubuntu versions 25.04, 24.04 LTS, and 22.04 LTS. This issue arises from improper memory handling within the ngx_mail_smtp_module during SMTP authentication, potentially allowing sensitive information to be transmitted over the network.
Details of the Vulnerability:
- Ubuntu Security Notice: USN-7715-1, dated August 25, 2025.
- Affected Releases:
- Ubuntu 25.04
- Ubuntu 24.04 LTS
- Ubuntu 22.04 LTS
- Impact: The vulnerability could allow sensitive data exposure during SMTP authentication.
- Software Description: Nginx is a small, powerful, and scalable web and proxy server.
Recommended Actions:
To mitigate this vulnerability, users are advised to update their systems to the specified package versions as follows:
- For 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
- For 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
- For 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
Users can perform a standard system update to implement all necessary changes.
Further Information:
For additional details, users can refer to:
- The official security notice: [Ubuntu Security Notice USN-7715-1](https://ubuntu.com/security/notices/USN-7715-1)
- The specific CVE entry: CVE-2025-53859
- Package information can be accessed via the following links:
- [nginx 1.26.3-2ubuntu1.2](https://launchpad.net/ubuntu/+source/nginx/1.26.3-2ubuntu1.2)
- [nginx 1.24.0-2ubuntu7.5](https://launchpad.net/ubuntu/+source/nginx/1.24.0-2ubuntu7.5)
- [nginx 1.18.0-6ubuntu14.7](https://launchpad.net/ubuntu/+source/nginx/1.18.0-6ubuntu14.7)
Conclusion:
All users of the affected Ubuntu versions are strongly encouraged to update their nginx installations promptly to protect against potential data breaches associated with this vulnerability. Regularly updating software is crucial in maintaining security and safeguarding sensitive information
A security vulnerability has been identified in the nginx web server that impacts users of Ubuntu versions 25.04, 24.04 LTS, and 22.04 LTS. This issue arises from improper memory handling within the ngx_mail_smtp_module during SMTP authentication, potentially allowing sensitive information to be transmitted over the network.
Details of the Vulnerability:
- Ubuntu Security Notice: USN-7715-1, dated August 25, 2025.
- Affected Releases:
- Ubuntu 25.04
- Ubuntu 24.04 LTS
- Ubuntu 22.04 LTS
- Impact: The vulnerability could allow sensitive data exposure during SMTP authentication.
- Software Description: Nginx is a small, powerful, and scalable web and proxy server.
Recommended Actions:
To mitigate this vulnerability, users are advised to update their systems to the specified package versions as follows:
- For 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
- For 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
- For 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
Users can perform a standard system update to implement all necessary changes.
Further Information:
For additional details, users can refer to:
- The official security notice: [Ubuntu Security Notice USN-7715-1](https://ubuntu.com/security/notices/USN-7715-1)
- The specific CVE entry: CVE-2025-53859
- Package information can be accessed via the following links:
- [nginx 1.26.3-2ubuntu1.2](https://launchpad.net/ubuntu/+source/nginx/1.26.3-2ubuntu1.2)
- [nginx 1.24.0-2ubuntu7.5](https://launchpad.net/ubuntu/+source/nginx/1.24.0-2ubuntu7.5)
- [nginx 1.18.0-6ubuntu14.7](https://launchpad.net/ubuntu/+source/nginx/1.18.0-6ubuntu14.7)
Conclusion:
All users of the affected Ubuntu versions are strongly encouraged to update their nginx installations promptly to protect against potential data breaches associated with this vulnerability. Regularly updating software is crucial in maintaining security and safeguarding sensitive information
Nginx update for Ubuntu
A security issue has been discovered in the nginx web server, affecting Ubuntu 25.04, 24.04 LTS, and 22.04 LTS releases. Due to incorrect memory handling by the ngx_mail_smtp_module module, the vulnerability enables the transmission of sensitive information over the network during SMTP authentication.
[USN-7715-1] nginx vulnerability
