🟢 Low ⏱ 5–15 min Last verified: 1 April 2022 Affected versions: Ubuntu 20.04 (focal) 📖 ~4 min read • Source: Ubuntu Security Notice USN-6901-1 Related CVEs: CVE-2021-20230 Upstream summary: It was discovered that stunnel did not properly validate client certificates when configured to use both the redirect and verifyChain options. A remote attacker […]
🔴 Critical ⏱ 5–30 min Last verified: 1 April 2022 Affected versions: Debian 11 📖 ~1 min read Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – Alternative Approaches Verification & Acceptance Criteria Rollback Plan Prevention & Hardening Related Errors & […]
Let’s Encrypt provides free, automatically renewable TLS certificates, and Certbot is the recommended client for obtaining and managing them. On RHEL 8, the certbot and python3-certbot-nginx packages are available from the EPEL (Extra Packages for Enterprise Linux) repository. Once installed, Certbot can automatically obtain a certificate and modify your Nginx configuration to enable HTTPS. This […]
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