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The lifespan of TLS certificates will be officially reduced to 47 days, as the information contained in certificates becomes less reliable over time. This change aims to enhance security by ensuring more frequent validation of domain ownership and reducing the risks associated with compromised or outdated certificates.
You Should Know:
1. Checking Certificate Expiration Date
To check the expiration date of a TLS certificate on a Linux system, use:
openssl s_client -connect example.com:443 2>/dev/null | openssl x509 -noout -dates
This command connects to `example.com` and extracts the certificate’s validity period.
2. Automating Certificate Renewal with Certbot
For Let’s Encrypt certificates, automate renewal using Certbot:
sudo certbot renew --dry-run Test renewal sudo certbot renew Actual renewal
Ensure your cron jobs are set up:
sudo crontab -e
Add:
0 0 /usr/bin/certbot renew --quiet
3. Windows: Checking Certificates via PowerShell
List all certificates in the local machine store:
Get-ChildItem -Path Cert:\LocalMachine\My
Check expiration:
Get-ChildItem -Path Cert:\LocalMachine\My | Where-Object { $_.NotAfter -lt (Get-Date).AddDays(30) }
4. Forcing TLS 1.2/1.3 on Web Servers
Apache:
SSLProtocol -all +TLSv1.2 +TLSv1.3
Nginx:
ssl_protocols TLSv1.2 TLSv1.3;
5. Revoking Compromised Certificates
If a private key is exposed, revoke the certificate:
sudo certbot revoke --cert-path /etc/letsencrypt/live/example.com/cert.pem
What Undercode Say:
The reduction of TLS certificate lifespans to 47 days is a necessary security measure to combat domain spoofing, phishing, and outdated encryption. System administrators must now:
– Automate renewals to avoid downtime.
– Monitor expirations with tools like Nagios or Zabbix.
– Enforce strong TLS protocols (disable SSLv3, TLS 1.0/1.1).
– Use OCSP Stapling to speed up validation:
ssl_stapling on; ssl_stapling_verify on;
– Rotate keys frequently using:
openssl req -newkey rsa:4096 -nodes -keyout new.key -out new.csr
Expected Output:
A more secure web with reduced risks from stale certificates, enforced by automation and strict protocol adherence.
Reference: securite.developpez.com
References:
Reported By: Piveteau Pierre – Hackers Feeds
Extra Hub: Undercode MoN
Basic Verification: Pass ✅
