A crafted method sent through HTTP/2 will bypass validation and be forwarded by mod_proxy, which can lead to request splitting or cache poisoning. This issue affects Apache HTTP Server 2.4.17 to 2.4.48.
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Alma_linux | — | Upgrade httpdUpgrade mod_ldapUpgrade httpd-develUpgrade mod_sessionUpgrade httpd-filesystemUpgrade mod_proxy_htmlUpgrade mod_sslUpgrade httpd-manualUpgrade mod_http2Upgrade httpd-toolsUpgrade mod_md | May 13, 2022 | Aug 16, 2021 |
| Alpine Linux | — | Upgrade apache2 | Aug 22, 2024 | Aug 16, 2021 |
| Amazon Linux Ami 2 | — | Upgrade mod_sslUpgrade httpd-filesystemUpgrade mod_ldapUpgrade httpd-debuginfoUpgrade mod_sessionUpgrade mod_mdUpgrade httpd-manualUpgrade httpdUpgrade mod_proxy_htmlUpgrade httpd-toolsUpgrade httpd-devel | Oct 18, 2021 | Aug 16, 2021 |
| Amazon_linux | — | Upgrade httpd24 | Oct 16, 2021 | Aug 16, 2021 |
| Apache Httpd | — | Upgrade to the latest version of Apache HTTPD | Dec 22, 2021 | Aug 16, 2021 |
| Centos_linux | — | Upgrade mod_proxy_htmlUpgrade httpd-filesystemUpgrade mod_http2-debugsourceUpgrade httpd-manualUpgrade httpd-debuginfoUpgrade mod_ldap-debuginfoUpgrade mod_md-debugsourceUpgrade httpd-develUpgrade mod_http2-debuginfoUpgrade mod_md-debuginfoUpgrade mod_mdUpgrade mod_sslUpgrade httpd-debugsourceUpgrade mod_proxy_html-debuginfoUpgrade mod_ldapUpgrade httpd-tools-debuginfoUpgrade httpd-toolsUpgrade mod_http2Upgrade mod_sessionUpgrade httpdUpgrade mod_ssl-debuginfoUpgrade mod_session-debuginfo | May 13, 2022 | Aug 16, 2021 |
| Check Point Gaia | — | Upgrade to supported version Check Point Gaia. | Feb 25, 2026 | Oct 27, 2021 |
| Cisco Telepresence Expressway | — | Upgrade to the latest version of Cisco TelePresence to resolve this vulnerability. | Sep 30, 2024 | Nov 24, 2021 |
| Debian | — | Upgrade apache2 | Mar 6, 2023 | Aug 16, 2021 |
| Freebsd | — | Upgrade apache24 | Nov 4, 2022 | Sep 17, 2021 |
| Gentoo Linux | — | Upgrade app-admin/apache-tools.Upgrade www-servers/apache. | Aug 16, 2022 | Aug 16, 2021 |
| Oracle Solaris | — | Upgrade web/server/apache-24 to version 2.4.51-11.4.38.0.1.101.6 on Solaris 11.4Upgrade web/server/apache-24/module/apache-ldap to version 2.4.51-11.4.38.0.1.101.6 on Solaris 11.4Upgrade web/server/apache-24/module/apache-dbd to version 2.4.51-11.4.38.0.1.101.6 on Solaris 11.4Upgrade web/server/apache-24/module/apache-ssl-fips-140 to version 2.4.51-11.4.38.0.1.101.6 on Solaris 11.4Upgrade web/server/apache-24/module/apache-gss to version 2.4.51-11.4.38.0.1.101.6 on Solaris 11.4Upgrade web/server/apache-24/module/apache-ssl to version 2.4.51-11.4.38.0.1.101.6 on Solaris 11.4Upgrade web/server/apache-24/module/apache-lua to version 2.4.51-11.4.38.0.1.101.6 on Solaris 11.4 | Nov 17, 2021 | Aug 16, 2021 |
| Oracle_linux | — | Upgrade httpd-filesystemUpgrade httpd-toolsUpgrade mod_http2Upgrade mod_ldapUpgrade httpd-develUpgrade httpd-manualUpgrade mod_sessionUpgrade mod_mdUpgrade mod_proxy_htmlUpgrade mod_sslUpgrade httpd | Apr 14, 2022 | Aug 5, 2021 |
| Redhat_linux | — | Upgrade mod_http2-debugsourceUpgrade mod_sslUpgrade mod_mdUpgrade mod_sessionUpgrade httpd-filesystemUpgrade mod_ldap-debuginfoUpgrade mod_proxy_htmlUpgrade mod_http2-debuginfoUpgrade mod_md-debuginfoUpgrade mod_md-debugsourceUpgrade mod_http2Upgrade httpd-toolsUpgrade httpd-debugsourceNo solution existsUpgrade httpd-manualUpgrade httpd-develUpgrade mod_session-debuginfoUpgrade httpdUpgrade mod_ssl-debuginfoUpgrade httpd-debuginfoUpgrade mod_proxy_html-debuginfoUpgrade mod_ldapUpgrade httpd-tools-debuginfo | May 13, 2022 | Aug 16, 2021 |
| Rocky_linux | — | Upgrade mod_proxy_htmlUpgrade mod_mdUpgrade httpd-toolsUpgrade httpd-develUpgrade mod_http2-debuginfoUpgrade httpdUpgrade mod_ssl-debuginfoUpgrade mod_md-debugsourceUpgrade httpd-debugsourceUpgrade mod_proxy_html-debuginfoUpgrade httpd-debuginfoUpgrade mod_session-debuginfoUpgrade mod_http2-debugsourceUpgrade mod_http2Upgrade mod_sslUpgrade httpd-tools-debuginfoUpgrade mod_ldapUpgrade mod_sessionUpgrade mod_md-debuginfoUpgrade mod_ldap-debuginfo | Mar 5, 2024 | Aug 16, 2021 |
| Suse | — | Upgrade apache2-preforkUpgrade apache2Upgrade apache2-example-pagesUpgrade apache2-develUpgrade apache2-workerUpgrade apache2-docUpgrade apache2-eventUpgrade apache2-utils | Sep 3, 2021 | Aug 16, 2021 |
| Ubuntu | — | Upgrade apache2-binUpgrade apache2 | Sep 28, 2021 | Aug 16, 2021 |
| Vmware Photon_os | — | Use 'tdnf update' to upgrade all packages to the latest version. | Jan 20, 2025 | Aug 16, 2021 |
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