LOW
The severity is rated LOW because the survey itself does not describe a vulnerability but rather highlights a common operational issue. However, mismanagement of certificate expiry could lead to higher severity issues like service downtime and security breaches.

The survey focuses on how teams manage the expiry of TLS/mTLS certificates, particularly in the context of partner integrations. Managing certificate expiry is crucial as expired certificates can lead to service disruptions and security vulnerabilities. This issue affects a wide range of technologies including web servers (e.g., Apache HTTP Server, Nginx), application servers, and various client applications that rely on secure connections. The broader security implication here is the potential for man-in-the-middle attacks if certificate expiry is not properly managed. Engineers and sysadmins must implement robust monitoring and automated renewal processes to mitigate these risks.

Affected Systems
  • Apache HTTP Server
  • Nginx
  • Various Client Applications
Affected Versions: All versions
Remediation
  • Configure automated monitoring tools for certificate expiration. For example, using Certbot with Let's Encrypt: `certbot certonly --non-interactive --agree-tos --email your_email@example.com -d example.com`.
  • Set up automatic renewal processes in the configuration files of web servers (e.g., Apache HTTP Server and Nginx). In the case of Nginx, ensure to include a cron job for renewal: `0 2 * * * /usr/bin/certbot renew --quiet`.
  • Implement certificate transparency logs to monitor issuance and expiration in real-time.
Stack Impact

In homelab environments using common stacks like LAMP or LNMP, the lack of proper monitoring can lead to service interruptions when certificates expire. For instance, a web server running Apache HTTP Server version 2.4 on Ubuntu might require updates in `/etc/apache2/sites-available/default-ssl.conf` for SSL configuration.

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