Enabling Online Certificate Status Protocol (OCSP) Stapling Causing Crash of Apache Httpd

Solution Unverified - Updated -

Issue

Client have added the following Apache HTTPD directives in ssl.conf file to enable OCSP stapling

    SSLStaplingCache shmcb:/var/run/ocsp(128000)
    SSLUseStapling on
    SSLStaplingResponderTimeout 5
    SSLStaplingReturnResponderErrors off

The above configuration is causing the Apache Httpd process to consume high memory which eventually is consuming all swap memory and crashing the Operating System, only a reboot of the server restores the issue.

Environment

  • Apache Httpd
    • 2.4.6

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