Advisory: Guidance for Apache HTTP Server 2.4 vulnerabilities (11/06/2023)   CVE-2021-44790   Affected version: Out-of-bounds Read vulnerability in mod_macro of Apache HTTP Server. This issue affects Apache HTTP Server: through 2.4.57.   Update 2.4.58 released 2023-10-19 Affects <=2.4.57   Diagnosis Execute below command to check the version of Apache HTTP Server 2.4:   sudo apt list --installed | grep apache   If the output showing version less than 2.4.58, you will need to perform the steps to upgrade the apache2 libraries. Solution Prerequisites: Your Expedition VM should have connectivity to http://ppa.launchpad.net and subdomains. ONLY required to do the libraries upgrade.   In Expedition CLI execute below commands:   Update the package repository: sudo apt-add-repository ppa:ondrej/apache2 Install deb lib packages: sudo apt-get install apache2 Check packages are installed sudo apt list --installed | grep apache Expected output: apache2-bin/focal,now 2.4.58-1+ubuntu20.04.1+deb.sury.org+1 amd64 [installed,automatic] apache2-data/focal,now 2.4.58-1+ubuntu20.04.1+deb.sury.org+1 all [installed,automatic] apache2-utils/focal,now 2.4.58-1+ubuntu20.04.1+deb.sury.org+1 amd64 [installed,automatic] apache2/focal,now 2.4.58-1+ubuntu20.04.1+deb.sury.org+1 amd64 [installed] libapache2-mod-php7.0/now 7.0.33-57+ubuntu20.04.1+deb.sury.org+1 amd64 [installed,upgradable to: 7.0.33-68+ubuntu20.04.1+deb.sury.org+2]​ Make /tmp folder writable for apache2 service Open file to edit: sudo vi /lib/systemd/system/apache2. service Change setting PrivateTmp from true to false (PrivateTmp=false) Save file and restart below services: sudo systemctl daemon-reload; sudo systemctl restart apache2