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RHEL 8 へのアップグレード後に "SSL_CTX_use_certificate:ee key too small" というエラーが表示される

Solution In Progress - Updated -

Issue

  • "SSL Library Error: error:140AB18F:SSL routines:SSL_CTX_use_certificate:ee key too small" というメッセージが表示されて httpd が起動に失敗するのはなぜですか? 以下は /var/log/httpd/ssl_error_log のサンプルです。

    AH02562: Failed to configure certificate www1.example.com:443:0 (with chain), check /etc/pki/tls/certs/server.crt
    SSL Library Error: error:140AB18F:SSL routines:SSL_CTX_use_certificate:ee key too small
    
  • NGINX は "key too small" というエラーで起動に失敗します。

    [emerg] SSL_CTX_use_certificate("/etc/nginx/certs/cert") failed (SSL: error:140AB18F:SSL routines:SSL_CTX_use_certificate:ee key too small)
    

Environment

  • Red Hat Enterprise Linux (RHEL) 8.x
    • httpd-2.4.37
  • Red Hat Software Collections (RHSCL)
  • Red Hat JBoss Core Services (JBCS)
  • Apache HTTPD
    • mod_ssl
  • NGINX

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