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 httpdUpgrade httpd-develUpgrade mod_luaUpgrade mod_sessionUpgrade httpd-coreUpgrade httpd-manualUpgrade mod_mdUpgrade mod_proxy_htmlUpgrade mod_sslUpgrade mod_ldapUpgrade httpd-toolsUpgrade httpd-filesystemUpgrade mod_http2 | Apr 21, 2023 | Mar 7, 2023 |
| Alpine Linux | — | Upgrade apache2 | Mar 26, 2024 | Mar 7, 2023 |
| Amazon Linux Ami 2 | — | Upgrade mod_mdUpgrade httpdUpgrade httpd-debuginfoUpgrade mod_proxy_htmlUpgrade httpd-filesystemUpgrade httpd-develUpgrade mod_sessionUpgrade httpd-manualUpgrade mod_sslUpgrade 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-tools-debuginfoUpgrade mod_ldapUpgrade mod_session-debuginfoUpgrade mod_proxy_htmlUpgrade mod_proxy_html-debuginfoUpgrade httpd-debugsourceUpgrade httpd-filesystemUpgrade mod_sslUpgrade httpd-manualUpgrade mod_lua-debuginfoUpgrade mod_sessionUpgrade httpd-debuginfoUpgrade mod_luaUpgrade httpd-core-debuginfoUpgrade httpdUpgrade mod_ssl-debuginfoUpgrade httpd-develUpgrade mod_ldap-debuginfoUpgrade httpd-coreUpgrade httpd-tools | 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 mod_sslUpgrade mod_sessionUpgrade httpd-debuginfoUpgrade httpdUpgrade httpd-develUpgrade httpd-toolsUpgrade httpd-manualUpgrade mod_proxy_html | 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 httpdUpgrade mod_sslUpgrade httpd-toolsUpgrade httpd-filesystem | 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 httpd-manualUpgrade httpdUpgrade mod_sessionUpgrade mod_ssl | Jun 9, 2023 | Mar 7, 2023 |
| Huawei Euleros 2_0_sp8 | — | Upgrade httpd-develUpgrade httpd-filesystemUpgrade httpd-manualUpgrade mod_sslUpgrade httpdUpgrade httpd-toolsUpgrade mod_session | Jun 9, 2023 | Mar 7, 2023 |
| Huawei Euleros 2_0_sp9 | — | Upgrade mod_sslUpgrade httpd-filesystemUpgrade httpd-toolsUpgrade httpd | 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-coreUpgrade httpd-develUpgrade mod_sslUpgrade mod_sessionUpgrade mod_proxy_htmlUpgrade httpd-filesystemUpgrade mod_ldapUpgrade httpdUpgrade mod_mdUpgrade httpd-manualUpgrade httpd-toolsUpgrade mod_http2Upgrade mod_lua | Apr 5, 2023 | Mar 7, 2023 |
| Redhat_linux | — | Upgrade httpd-toolsUpgrade mod_http2-debugsourceUpgrade mod_ssl-debuginfoUpgrade mod_http2-debuginfoUpgrade mod_md-debugsourceUpgrade mod_mdUpgrade httpdUpgrade mod_proxy_htmlUpgrade mod_sslUpgrade httpd-develUpgrade mod_ldap-debuginfoUpgrade httpd-debuginfoUpgrade mod_lua-debuginfoUpgrade mod_luaUpgrade mod_proxy_html-debuginfoUpgrade httpd-coreUpgrade mod_sessionUpgrade httpd-manualUpgrade mod_session-debuginfoUpgrade mod_md-debuginfoUpgrade mod_ldapUpgrade mod_http2Upgrade httpd-core-debuginfoUpgrade httpd-debugsourceUpgrade httpd-filesystemUpgrade httpd-tools-debuginfo | Apr 6, 2023 | Mar 7, 2023 |
| Rocky_linux | — | Upgrade httpd-debugsourceUpgrade mod_ldapUpgrade mod_lua-debuginfoUpgrade mod_sslUpgrade mod_mdUpgrade httpd-debuginfoUpgrade mod_ldap-debuginfoUpgrade mod_sessionUpgrade mod_md-debuginfoUpgrade httpdUpgrade httpd-tools-debuginfoUpgrade mod_proxy_html-debuginfoUpgrade httpd-develUpgrade mod_http2-debuginfoUpgrade mod_session-debuginfoUpgrade httpd-core-debuginfoUpgrade httpd-coreUpgrade mod_ssl-debuginfoUpgrade mod_md-debugsourceUpgrade mod_http2-debugsourceUpgrade mod_luaUpgrade mod_http2Upgrade httpd-toolsUpgrade mod_proxy_html | Mar 12, 2024 | Mar 7, 2023 |
| Suse | — | Upgrade apache2-docUpgrade apache2-eventUpgrade apache2-utilsUpgrade apache2-develUpgrade apache2-workerUpgrade apache2-preforkUpgrade apache2-example-pagesUpgrade apache2 | 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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