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 mod_luaUpgrade httpd-develUpgrade mod_sessionUpgrade mod_ldapUpgrade httpd-filesystemUpgrade mod_proxy_htmlUpgrade httpd-coreUpgrade mod_sslUpgrade httpd-toolsUpgrade mod_mdUpgrade mod_http2Upgrade httpd-manual | Apr 21, 2023 | Mar 7, 2023 |
| Alpine Linux | — | Upgrade apache2 | Mar 26, 2024 | Mar 7, 2023 |
| Amazon Linux Ami 2 | — | Upgrade httpd-manualUpgrade mod_mdUpgrade httpd-filesystemUpgrade mod_sslUpgrade mod_sessionUpgrade httpd-debuginfoUpgrade mod_proxy_htmlUpgrade httpd-develUpgrade httpdUpgrade mod_ldapUpgrade httpd-tools | Mar 22, 2023 | Mar 7, 2023 |
| Amazon_linux | — | Upgrade httpd24 | Mar 23, 2023 | Mar 7, 2023 |
| Amazon_linux_2023 | — | Upgrade httpd-coreUpgrade httpd-toolsUpgrade httpd-develUpgrade httpdUpgrade mod_ldap-debuginfoUpgrade mod_ssl-debuginfoUpgrade httpd-core-debuginfoUpgrade mod_luaUpgrade mod_proxy_html-debuginfoUpgrade httpd-manualUpgrade httpd-filesystemUpgrade httpd-debugsourceUpgrade httpd-debuginfoUpgrade mod_sessionUpgrade mod_proxy_htmlUpgrade mod_lua-debuginfoUpgrade mod_sslUpgrade mod_session-debuginfoUpgrade httpd-tools-debuginfoUpgrade mod_ldap | 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 httpd-manualUpgrade mod_proxy_htmlUpgrade mod_sessionUpgrade httpdUpgrade mod_sslUpgrade mod_ldapUpgrade httpd-debuginfoUpgrade httpd-devel | 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 httpd-filesystemUpgrade mod_sslUpgrade httpd-toolsUpgrade httpd | Jul 5, 2023 | Mar 7, 2023 |
| Huawei Euleros 2_0_sp5 | — | Upgrade httpd-manualUpgrade mod_sessionUpgrade httpdUpgrade mod_sslUpgrade httpd-develUpgrade httpd-tools | Jun 9, 2023 | Mar 7, 2023 |
| Huawei Euleros 2_0_sp8 | — | Upgrade httpd-toolsUpgrade mod_sessionUpgrade httpd-manualUpgrade mod_sslUpgrade httpdUpgrade httpd-develUpgrade httpd-filesystem | Jun 9, 2023 | Mar 7, 2023 |
| Huawei Euleros 2_0_sp9 | — | Upgrade httpdUpgrade httpd-toolsUpgrade httpd-filesystemUpgrade mod_ssl | May 10, 2023 | Mar 7, 2023 |
| Ibm Http_server | — | Apply IBM HTTP Server Interim Fix PH53014Apply IBM HTTP Server version 9.0.5.16 or laterApply IBM HTTP Server version 8.5.5.24 or later | May 16, 2024 | Apr 4, 2023 |
| Oracle_linux | — | Upgrade mod_http2Upgrade httpd-toolsUpgrade mod_luaUpgrade httpd-coreUpgrade httpdUpgrade mod_sslUpgrade mod_ldapUpgrade mod_sessionUpgrade httpd-develUpgrade httpd-manualUpgrade httpd-filesystemUpgrade mod_proxy_htmlUpgrade mod_md | Apr 5, 2023 | Mar 7, 2023 |
| Redhat_linux | — | Upgrade httpd-coreUpgrade httpd-filesystemUpgrade mod_lua-debuginfoUpgrade mod_http2Upgrade httpd-debugsourceUpgrade httpd-core-debuginfoUpgrade mod_proxy_html-debuginfoUpgrade mod_ldapUpgrade mod_luaUpgrade httpd-tools-debuginfoUpgrade mod_sessionUpgrade mod_md-debuginfoUpgrade mod_session-debuginfoUpgrade httpd-manualUpgrade httpdUpgrade mod_sslUpgrade httpd-develUpgrade mod_ssl-debuginfoUpgrade mod_mdUpgrade httpd-debuginfoUpgrade mod_md-debugsourceUpgrade mod_proxy_htmlUpgrade httpd-toolsUpgrade mod_ldap-debuginfoUpgrade mod_http2-debugsourceUpgrade mod_http2-debuginfo | Apr 6, 2023 | Mar 7, 2023 |
| Rocky_linux | — | Upgrade mod_sessionUpgrade httpd-debugsourceUpgrade httpd-develUpgrade mod_md-debuginfoUpgrade mod_lua-debuginfoUpgrade mod_http2-debuginfoUpgrade mod_proxy_html-debuginfoUpgrade mod_sslUpgrade httpdUpgrade mod_ldapUpgrade httpd-tools-debuginfoUpgrade mod_ldap-debuginfoUpgrade mod_mdUpgrade httpd-debuginfoUpgrade mod_session-debuginfoUpgrade mod_md-debugsourceUpgrade mod_ssl-debuginfoUpgrade mod_proxy_htmlUpgrade mod_luaUpgrade mod_http2Upgrade httpd-toolsUpgrade httpd-coreUpgrade mod_http2-debugsourceUpgrade httpd-core-debuginfo | Mar 12, 2024 | Mar 7, 2023 |
| Suse | — | Upgrade apache2-eventUpgrade apache2-develUpgrade apache2-utilsUpgrade apache2-docUpgrade 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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