A vulnerability was found in Apache HTTP Server 2.4.34 to 2.4.38. When HTTP/2 was enabled for a http: host or H2Upgrade was enabled for h2 on a https: host, an Upgrade request from http/1.1 to http/2 that was not the first request on a connection could lead to a misconfiguration and crash. Server that never enabled the h2 protocol or that only enabled it for https: and did not set "H2Upgrade on" are unaffected by this issue.
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Alma_linux | — | Upgrade mod_md | May 4, 2022 | Jun 11, 2019 |
| Alpine Linux | — | Upgrade apache2 | Jun 11, 2019 | Jun 11, 2019 |
| Amazon Linux Ami 2 | — | Upgrade mod_proxy_htmlUpgrade mod_mdUpgrade httpd-toolsUpgrade httpd-manualUpgrade mod_sslUpgrade httpdUpgrade mod_sessionUpgrade httpd-filesystemUpgrade httpd-develUpgrade httpd-debuginfoUpgrade mod_ldap | Apr 27, 2020 | Jun 11, 2019 |
| Amazon_linux | — | Upgrade httpd24 | Aug 7, 2019 | Apr 5, 2019 |
| Apache Httpd | — | Upgrade to the latest version of Apache HTTPD | Jun 11, 2019 | Jun 11, 2019 |
| Arch Linux | — | Upgrade to the latest version of Arch Linux | Jul 11, 2025 | Jun 11, 2019 |
| Centos_linux | — | Upgrade httpdUpgrade mod_ssl-debuginfoUpgrade mod_ldapUpgrade mod_session-debuginfoUpgrade mod_proxy_html-debuginfoUpgrade httpd-toolsUpgrade httpd-tools-debuginfoUpgrade httpd-manualUpgrade httpd-develUpgrade mod_http2Upgrade mod_proxy_htmlUpgrade mod_mdUpgrade mod_md-debuginfoUpgrade httpd-debugsourceUpgrade httpd-filesystemUpgrade mod_http2-debuginfoUpgrade mod_ldap-debuginfoUpgrade mod_sslUpgrade mod_http2-debugsourceUpgrade mod_md-debugsourceUpgrade mod_sessionUpgrade httpd-debuginfo | Nov 5, 2020 | Jun 11, 2019 |
| Debian | — | Upgrade apache2 | Jul 30, 2024 | Jun 11, 2019 |
| Hpux | — | Update hpuxwsAPACHE to the latest version | Sep 16, 2019 | Jun 11, 2019 |
| Huawei Euleros 2_0_sp8 | — | Upgrade httpd-develUpgrade httpdUpgrade mod_sessionUpgrade httpd-filesystemUpgrade mod_sslUpgrade httpd-manualUpgrade httpd-tools | Mar 24, 2020 | Jun 11, 2019 |
| Ibm Http_server | — | Apply IBM HTTP Server version 9.0.5.0 or later | Nov 5, 2019 | Jun 11, 2019 |
| Oracle Solaris | — | Upgrade web/server/apache-24/module/apache-dbd to version 2.4.39-0.175.3.36.0.11.0 on Solaris 11.3Upgrade web/server/apache-24 to version 2.4.39-11.4.9.0.1.1.0 on Solaris 11.4Upgrade web/server/apache-24/module/apache-lua to version 2.4.39-11.4.9.0.1.1.0 on Solaris 11.4Upgrade web/server/apache-24/module/apache-lua to version 2.4.39-0.175.3.36.0.11.0 on Solaris 11.3Upgrade web/server/apache-24/module/apache-ssl to version 2.4.39-0.175.3.36.0.11.0 on Solaris 11.3Upgrade web/server/apache-24/module/apache-ssl to version 2.4.39-11.4.9.0.1.1.0 on Solaris 11.4Upgrade web/server/apache-24/module/apache-ldap to version 2.4.39-0.175.3.36.0.11.0 on Solaris 11.3Upgrade web/server/apache-24/module/apache-gss to version 2.4.39-0.175.3.36.0.11.0 on Solaris 11.3Upgrade web/server/apache-24/module/apache-ldap to version 2.4.39-11.4.9.0.1.1.0 on Solaris 11.4Upgrade web/server/apache-24 to version 2.4.39-0.175.3.36.0.11.0 on Solaris 11.3Upgrade web/server/apache-24/module/apache-ssl-fips-140 to version 2.4.39-0.175.3.36.0.11.0 on Solaris 11.3Upgrade web/server/apache-24/module/apache-gss to version 2.4.39-11.4.9.0.1.1.0 on Solaris 11.4Upgrade web/server/apache-24/module/apache-ssl-fips-140 to version 2.4.39-11.4.9.0.1.1.0 on Solaris 11.4Upgrade web/server/apache-24/module/apache-dbd to version 2.4.39-11.4.9.0.1.1.0 on Solaris 11.4 | May 30, 2019 | May 30, 2019 |
| Oracle_linux | — | Upgrade mod_ldapUpgrade mod_proxy_htmlUpgrade mod_sslUpgrade mod_mdUpgrade httpd-filesystemUpgrade mod_http2Upgrade mod_sessionUpgrade httpd-manualUpgrade httpd-toolsUpgrade httpd-develUpgrade httpd | Nov 12, 2020 | Feb 1, 2019 |
| Redhat_linux | — | Upgrade mod_md-debugsourceUpgrade mod_session-debuginfoUpgrade mod_ssl-debuginfoUpgrade httpd-tools-debuginfoUpgrade mod_http2Upgrade httpd-filesystemUpgrade httpd-develUpgrade httpd-toolsUpgrade mod_http2-debuginfoUpgrade mod_proxy_htmlUpgrade httpd-manualUpgrade mod_ldap-debuginfoUpgrade httpdUpgrade mod_http2-debugsourceUpgrade mod_md-debuginfoUpgrade mod_proxy_html-debuginfoUpgrade httpd-debuginfoUpgrade mod_sslUpgrade mod_sessionUpgrade httpd-debugsourceUpgrade mod_mdUpgrade mod_ldap | Nov 5, 2020 | Jun 11, 2019 |
| Rocky_linux | — | Upgrade mod_md-debugsourceUpgrade mod_md-debuginfoUpgrade mod_md | Mar 12, 2024 | Jun 11, 2019 |
| Suse | — | Upgrade apache2-preforkUpgrade apache2-workerUpgrade apache2-utilsUpgrade apache2Upgrade apache2-develUpgrade apache2-example-pagesUpgrade apache2-eventUpgrade apache2-doc | Apr 5, 2019 | Apr 4, 2019 |
| Ubuntu | — | Upgrade apache2-binUpgrade apache2 | Aug 30, 2019 | Apr 5, 2019 |
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