Some mod_proxy configurations on Apache HTTP Server versions 2.4.0 through 2.4.55 allow a HTTP Request Smuggling attack.
Configurations are affected when mod_proxy is enabled along with some form of RewriteRule or ProxyPassMatch in which a non-specific pattern matches some portion of the user-supplied request-target (URL) data and is then re-inserted into the proxied request-target using variable substitution. For example, something like:
RewriteEngine on RewriteRule "^/here/(.*)" "http://example.com:8080/elsewhere?$1"; [P] ProxyPassReverse /here/ http://example.com:8080/
Request splitting/smuggling could result in bypass of access controls in the proxy server, proxying unintended URLs to existing origin servers, and cache poisoning. Users are recommended to update to at least version 2.4.56 of Apache HTTP Server.
CVSS Details
- CVSS 3.1 Base Score: 9.8
- CVSS 3.1 Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H)
Covered by Rapid7
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Alma_linux | — | Upgrade httpd-develUpgrade mod_luaUpgrade httpdUpgrade mod_sessionUpgrade mod_proxy_htmlUpgrade mod_mdUpgrade mod_ldapUpgrade mod_sslUpgrade httpd-filesystemUpgrade httpd-toolsUpgrade httpd-manualUpgrade mod_http2Upgrade httpd-core | Apr 21, 2023 | Mar 7, 2023 |
| Alpine Linux | — | Upgrade apache2 | Mar 26, 2024 | Mar 7, 2023 |
| Amazon Linux Ami 2 | — | Upgrade httpd-filesystemUpgrade mod_sessionUpgrade mod_sslUpgrade httpdUpgrade httpd-manualUpgrade httpd-develUpgrade mod_mdUpgrade mod_proxy_htmlUpgrade httpd-debuginfoUpgrade httpd-toolsUpgrade mod_ldap | Mar 22, 2023 | Mar 7, 2023 |
| Amazon_linux | — | Upgrade httpd24 | Mar 23, 2023 | Mar 7, 2023 |
| Amazon_linux_2023 | — | Upgrade httpd-coreUpgrade httpd-core-debuginfoUpgrade httpd-develUpgrade mod_ldap-debuginfoUpgrade mod_luaUpgrade httpdUpgrade mod_ssl-debuginfoUpgrade httpd-toolsUpgrade mod_sslUpgrade mod_ldapUpgrade mod_sessionUpgrade httpd-debuginfoUpgrade httpd-filesystemUpgrade mod_proxy_htmlUpgrade httpd-manualUpgrade httpd-debugsourceUpgrade mod_lua-debuginfoUpgrade mod_session-debuginfoUpgrade mod_proxy_html-debuginfoUpgrade httpd-tools-debuginfo | Feb 17, 2025 | Mar 7, 2023 |
| Apache Httpd | — | Upgrade to the latest version of Apache HTTPD | Nov 29, 2023 | Mar 7, 2023 |
| Centos_linux | — | Upgrade mod_proxy_htmlUpgrade httpd-toolsUpgrade httpd-manualUpgrade httpdUpgrade mod_sessionUpgrade httpd-debuginfoUpgrade mod_ldapUpgrade httpd-develUpgrade mod_ssl | Apr 6, 2023 | Mar 7, 2023 |
| Debian | — | Upgrade apache2 | Mar 22, 2023 | Mar 7, 2023 |
| Freebsd | — | Upgrade apache24 | Mar 23, 2023 | Mar 11, 2023 |
| Gentoo Linux | — | Upgrade www-servers/apache. | Sep 11, 2023 | Mar 7, 2023 |
| Huawei Euleros 2_0_sp10 | — | Upgrade httpd-filesystemUpgrade httpd-toolsUpgrade mod_sslUpgrade httpd | May 9, 2023 | Mar 7, 2023 |
| Huawei Euleros 2_0_sp11 | — | Upgrade httpdUpgrade httpd-toolsUpgrade mod_sslUpgrade httpd-filesystem | Jul 5, 2023 | Mar 7, 2023 |
| Huawei Euleros 2_0_sp5 | — | Upgrade httpd-toolsUpgrade httpd-develUpgrade mod_sslUpgrade httpdUpgrade httpd-manualUpgrade mod_session | Jun 9, 2023 | Mar 7, 2023 |
| Huawei Euleros 2_0_sp8 | — | Upgrade httpd-develUpgrade httpd-filesystemUpgrade mod_sslUpgrade httpd-manualUpgrade httpd-toolsUpgrade mod_sessionUpgrade httpd | Jun 9, 2023 | Mar 7, 2023 |
| Huawei Euleros 2_0_sp9 | — | Upgrade httpd-filesystemUpgrade mod_sslUpgrade httpdUpgrade httpd-tools | May 10, 2023 | Mar 7, 2023 |
| Ibm Http_server | — | Apply IBM HTTP Server version 8.5.5.24 or laterApply IBM HTTP Server version 9.0.5.16 or laterApply IBM HTTP Server Interim Fix PH53014 | May 16, 2024 | Apr 4, 2023 |
| Oracle_linux | — | Upgrade httpd-toolsUpgrade mod_http2Upgrade mod_luaUpgrade httpdUpgrade httpd-coreUpgrade mod_sslUpgrade httpd-manualUpgrade httpd-develUpgrade mod_sessionUpgrade httpd-filesystemUpgrade mod_mdUpgrade mod_proxy_htmlUpgrade mod_ldap | Apr 5, 2023 | Mar 7, 2023 |
| Redhat_linux | — | Upgrade mod_md-debugsourceUpgrade mod_proxy_htmlUpgrade mod_mdUpgrade mod_sslUpgrade mod_http2-debuginfoUpgrade mod_http2-debugsourceUpgrade mod_ldap-debuginfoUpgrade httpd-develUpgrade mod_ssl-debuginfoUpgrade httpdUpgrade httpd-debuginfoUpgrade httpd-toolsUpgrade httpd-manualUpgrade mod_sessionUpgrade mod_http2Upgrade httpd-tools-debuginfoUpgrade mod_md-debuginfoUpgrade httpd-debugsourceUpgrade mod_ldapUpgrade mod_lua-debuginfoUpgrade httpd-filesystemUpgrade httpd-coreUpgrade mod_proxy_html-debuginfoUpgrade mod_session-debuginfoUpgrade mod_luaUpgrade httpd-core-debuginfo | Apr 6, 2023 | Mar 7, 2023 |
| Rocky_linux | — | Upgrade mod_ssl-debuginfoUpgrade mod_http2-debugsourceUpgrade mod_md-debugsourceUpgrade httpd-coreUpgrade httpd-toolsUpgrade mod_proxy_htmlUpgrade mod_http2Upgrade mod_luaUpgrade httpd-core-debuginfoUpgrade mod_ldap-debuginfoUpgrade mod_mdUpgrade mod_session-debuginfoUpgrade httpd-tools-debuginfoUpgrade httpdUpgrade mod_proxy_html-debuginfoUpgrade mod_http2-debuginfoUpgrade httpd-debuginfoUpgrade httpd-develUpgrade httpd-debugsourceUpgrade mod_sessionUpgrade mod_sslUpgrade mod_md-debuginfoUpgrade mod_ldapUpgrade mod_lua-debuginfo | Mar 12, 2024 | Mar 7, 2023 |
| Suse | — | Upgrade apache2-utilsUpgrade apache2-docUpgrade apache2-develUpgrade apache2-eventUpgrade apache2-workerUpgrade apache2-preforkUpgrade apache2Upgrade apache2-example-pages | Mar 20, 2023 | Mar 7, 2023 |
| Ubuntu | — | Upgrade apache2Upgrade apache2 (Ubuntu Pro) | Mar 22, 2023 | Mar 7, 2023 |
| Vmware Photon_os | — | Use 'tdnf update' to upgrade all packages to the latest version. | Jan 20, 2025 | Mar 7, 2023 |
| Zimbra Collaboration | — | Upgrade Zimbra Collaboration to the latest version | Jan 20, 2025 | Mar 7, 2023 |
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