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 mod_luaUpgrade httpd-develUpgrade httpdUpgrade mod_ldapUpgrade mod_proxy_htmlUpgrade mod_sslUpgrade httpd-filesystemUpgrade httpd-manualUpgrade mod_http2Upgrade mod_mdUpgrade httpd-toolsUpgrade httpd-core | Apr 21, 2023 | Mar 7, 2023 |
| Alpine Linux | — | Upgrade apache2 | Mar 26, 2024 | Mar 7, 2023 |
| Amazon Linux Ami 2 | — | Upgrade httpd-manualUpgrade mod_sessionUpgrade mod_proxy_htmlUpgrade httpdUpgrade httpd-filesystemUpgrade httpd-debuginfoUpgrade mod_sslUpgrade mod_mdUpgrade httpd-develUpgrade 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-debugsourceUpgrade mod_lua-debuginfoUpgrade mod_sslUpgrade httpd-filesystemUpgrade httpd-manualUpgrade mod_sessionUpgrade mod_ldapUpgrade httpd-tools-debuginfoUpgrade httpd-debuginfoUpgrade mod_proxy_htmlUpgrade mod_session-debuginfoUpgrade mod_proxy_html-debuginfoUpgrade mod_ssl-debuginfoUpgrade mod_ldap-debuginfoUpgrade httpdUpgrade httpd-toolsUpgrade httpd-coreUpgrade mod_luaUpgrade httpd-core-debuginfoUpgrade httpd-devel | 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 httpd-toolsUpgrade mod_proxy_htmlUpgrade httpd-manualUpgrade httpdUpgrade httpd-debuginfoUpgrade mod_sessionUpgrade mod_sslUpgrade httpd-develUpgrade mod_ldap | 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 httpdUpgrade mod_ssl | May 9, 2023 | Mar 7, 2023 |
| Huawei Euleros 2_0_sp11 | — | Upgrade httpd-filesystemUpgrade mod_sslUpgrade httpdUpgrade httpd-tools | Jul 5, 2023 | Mar 7, 2023 |
| Huawei Euleros 2_0_sp5 | — | Upgrade httpd-develUpgrade httpd-toolsUpgrade mod_sessionUpgrade httpdUpgrade httpd-manualUpgrade mod_ssl | Jun 9, 2023 | Mar 7, 2023 |
| Huawei Euleros 2_0_sp8 | — | Upgrade mod_sessionUpgrade httpd-manualUpgrade httpd-develUpgrade httpd-filesystemUpgrade mod_sslUpgrade httpdUpgrade httpd-tools | Jun 9, 2023 | Mar 7, 2023 |
| Huawei Euleros 2_0_sp9 | — | Upgrade httpdUpgrade httpd-toolsUpgrade mod_sslUpgrade httpd-filesystem | May 10, 2023 | Mar 7, 2023 |
| Ibm Http_server | — | Apply IBM HTTP Server version 8.5.5.24 or laterApply IBM HTTP Server Interim Fix PH53014Apply IBM HTTP Server version 9.0.5.16 or later | May 16, 2024 | Apr 4, 2023 |
| Oracle_linux | — | Upgrade mod_luaUpgrade httpd-toolsUpgrade mod_http2Upgrade mod_sessionUpgrade httpd-coreUpgrade mod_mdUpgrade httpd-filesystemUpgrade httpd-manualUpgrade mod_proxy_htmlUpgrade httpdUpgrade httpd-develUpgrade mod_ldapUpgrade mod_ssl | Apr 5, 2023 | Mar 7, 2023 |
| Redhat_linux | — | Upgrade httpd-coreUpgrade httpd-tools-debuginfoUpgrade httpd-debugsourceUpgrade mod_lua-debuginfoUpgrade mod_ldapUpgrade mod_proxy_html-debuginfoUpgrade mod_http2Upgrade httpd-core-debuginfoUpgrade mod_sessionUpgrade httpd-manualUpgrade mod_session-debuginfoUpgrade mod_md-debuginfoUpgrade mod_luaUpgrade httpd-filesystemUpgrade httpd-toolsUpgrade mod_mdUpgrade httpd-debuginfoUpgrade mod_http2-debugsourceUpgrade mod_ldap-debuginfoUpgrade mod_md-debugsourceUpgrade mod_proxy_htmlUpgrade mod_sslUpgrade mod_ssl-debuginfoUpgrade httpd-develUpgrade mod_http2-debuginfoUpgrade httpd | Apr 6, 2023 | Mar 7, 2023 |
| Rocky_linux | — | Upgrade mod_http2-debugsourceUpgrade mod_md-debugsourceUpgrade httpd-core-debuginfoUpgrade mod_ssl-debuginfoUpgrade httpd-coreUpgrade mod_luaUpgrade httpd-toolsUpgrade mod_http2Upgrade mod_proxy_htmlUpgrade httpd-develUpgrade httpd-debuginfoUpgrade mod_session-debuginfoUpgrade mod_ldap-debuginfoUpgrade mod_lua-debuginfoUpgrade mod_proxy_html-debuginfoUpgrade mod_http2-debuginfoUpgrade httpdUpgrade mod_mdUpgrade httpd-tools-debuginfoUpgrade mod_sslUpgrade mod_ldapUpgrade httpd-debugsourceUpgrade mod_sessionUpgrade mod_md-debuginfo | Mar 12, 2024 | Mar 7, 2023 |
| Suse | — | Upgrade apache2-preforkUpgrade apache2-workerUpgrade apache2Upgrade apache2-example-pagesUpgrade apache2-docUpgrade apache2-eventUpgrade apache2-utilsUpgrade apache2-devel | 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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