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 mod_sessionUpgrade httpd-develUpgrade httpdUpgrade mod_luaUpgrade httpd-coreUpgrade mod_ldapUpgrade mod_http2Upgrade mod_sslUpgrade httpd-manualUpgrade httpd-toolsUpgrade httpd-filesystemUpgrade mod_proxy_htmlUpgrade mod_md | Apr 21, 2023 | Mar 7, 2023 |
| Alpine Linux | — | Upgrade apache2 | Mar 26, 2024 | Mar 7, 2023 |
| Amazon Linux Ami 2 | — | Upgrade httpd-toolsUpgrade mod_ldapUpgrade mod_proxy_htmlUpgrade httpd-filesystemUpgrade httpdUpgrade mod_sslUpgrade mod_sessionUpgrade mod_mdUpgrade httpd-debuginfoUpgrade httpd-develUpgrade httpd-manual | Mar 22, 2023 | Mar 7, 2023 |
| Amazon_linux | — | Upgrade httpd24 | Mar 23, 2023 | Mar 7, 2023 |
| Amazon_linux_2023 | — | Upgrade mod_proxy_html-debuginfoUpgrade mod_sessionUpgrade mod_session-debuginfoUpgrade httpd-filesystemUpgrade httpd-manualUpgrade httpd-tools-debuginfoUpgrade mod_proxy_htmlUpgrade mod_sslUpgrade httpd-debugsourceUpgrade mod_lua-debuginfoUpgrade httpd-debuginfoUpgrade mod_ldapUpgrade httpd-toolsUpgrade mod_ssl-debuginfoUpgrade httpd-coreUpgrade mod_luaUpgrade httpd-core-debuginfoUpgrade mod_ldap-debuginfoUpgrade httpd-develUpgrade httpd | 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_ldapUpgrade httpdUpgrade mod_sessionUpgrade mod_sslUpgrade httpd-develUpgrade httpd-debuginfoUpgrade mod_proxy_htmlUpgrade httpd-toolsUpgrade httpd-manual | 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-toolsUpgrade httpd-filesystemUpgrade mod_sslUpgrade httpd | May 9, 2023 | Mar 7, 2023 |
| Huawei Euleros 2_0_sp11 | — | Upgrade httpd-toolsUpgrade httpdUpgrade httpd-filesystemUpgrade mod_ssl | Jul 5, 2023 | Mar 7, 2023 |
| Huawei Euleros 2_0_sp5 | — | Upgrade httpd-toolsUpgrade httpd-develUpgrade mod_sessionUpgrade httpdUpgrade httpd-manualUpgrade mod_ssl | Jun 9, 2023 | Mar 7, 2023 |
| Huawei Euleros 2_0_sp8 | — | Upgrade httpd-develUpgrade httpd-filesystemUpgrade mod_sslUpgrade httpd-toolsUpgrade mod_sessionUpgrade httpdUpgrade httpd-manual | 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 Interim Fix PH53014Apply IBM HTTP Server version 8.5.5.24 or laterApply IBM HTTP Server version 9.0.5.16 or later | May 16, 2024 | Apr 4, 2023 |
| Oracle_linux | — | Upgrade mod_luaUpgrade mod_http2Upgrade httpd-toolsUpgrade mod_proxy_htmlUpgrade httpd-manualUpgrade mod_sessionUpgrade httpd-coreUpgrade mod_ldapUpgrade mod_mdUpgrade httpd-filesystemUpgrade mod_sslUpgrade httpd-develUpgrade httpd | Apr 5, 2023 | Mar 7, 2023 |
| Redhat_linux | — | Upgrade mod_http2-debuginfoUpgrade mod_sslUpgrade mod_proxy_htmlUpgrade mod_ssl-debuginfoUpgrade mod_md-debugsourceUpgrade mod_http2-debugsourceUpgrade httpdUpgrade httpd-develUpgrade mod_ldap-debuginfoUpgrade httpd-debuginfoUpgrade httpd-toolsUpgrade mod_mdUpgrade mod_sessionUpgrade mod_ldapUpgrade mod_session-debuginfoUpgrade mod_md-debuginfoUpgrade mod_lua-debuginfoUpgrade httpd-filesystemUpgrade mod_luaUpgrade mod_proxy_html-debuginfoUpgrade httpd-core-debuginfoUpgrade httpd-coreUpgrade mod_http2Upgrade httpd-manualUpgrade httpd-tools-debuginfoUpgrade httpd-debugsource | Apr 6, 2023 | Mar 7, 2023 |
| Rocky_linux | — | Upgrade mod_http2Upgrade mod_http2-debugsourceUpgrade httpd-core-debuginfoUpgrade mod_md-debugsourceUpgrade mod_ssl-debuginfoUpgrade httpd-coreUpgrade mod_proxy_htmlUpgrade httpd-toolsUpgrade mod_luaUpgrade mod_ldap-debuginfoUpgrade mod_mdUpgrade mod_sslUpgrade httpdUpgrade mod_lua-debuginfoUpgrade httpd-debuginfoUpgrade httpd-tools-debuginfoUpgrade mod_ldapUpgrade mod_proxy_html-debuginfoUpgrade mod_http2-debuginfoUpgrade mod_session-debuginfoUpgrade mod_md-debuginfoUpgrade httpd-develUpgrade httpd-debugsourceUpgrade mod_session | Mar 12, 2024 | Mar 7, 2023 |
| Suse | — | Upgrade apache2-example-pagesUpgrade apache2Upgrade apache2-workerUpgrade apache2-preforkUpgrade apache2-eventUpgrade apache2-docUpgrade apache2-develUpgrade apache2-utils | 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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