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-toolsUpgrade mod_sslUpgrade httpd-manualUpgrade httpd-filesystemUpgrade httpd-coreUpgrade mod_proxy_htmlUpgrade mod_ldapUpgrade mod_mdUpgrade mod_http2Upgrade mod_luaUpgrade httpd-develUpgrade mod_sessionUpgrade httpd | Apr 21, 2023 | Mar 7, 2023 |
| Alpine Linux | — | Upgrade apache2 | Mar 26, 2024 | Mar 7, 2023 |
| Amazon Linux Ami 2 | — | Upgrade mod_ldapUpgrade httpd-toolsUpgrade httpd-develUpgrade mod_proxy_htmlUpgrade mod_sessionUpgrade mod_sslUpgrade httpdUpgrade httpd-manualUpgrade mod_mdUpgrade httpd-filesystemUpgrade httpd-debuginfo | Mar 22, 2023 | Mar 7, 2023 |
| Amazon_linux | — | Upgrade httpd24 | Mar 23, 2023 | Mar 7, 2023 |
| Amazon_linux_2023 | — | Upgrade httpd-tools-debuginfoUpgrade mod_lua-debuginfoUpgrade mod_ldapUpgrade httpd-filesystemUpgrade mod_proxy_html-debuginfoUpgrade mod_session-debuginfoUpgrade mod_proxy_htmlUpgrade httpd-debuginfoUpgrade mod_sslUpgrade httpd-manualUpgrade httpd-debugsourceUpgrade mod_sessionUpgrade httpd-develUpgrade mod_ssl-debuginfoUpgrade httpd-toolsUpgrade httpd-coreUpgrade mod_luaUpgrade httpd-core-debuginfoUpgrade httpdUpgrade mod_ldap-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 mod_sessionUpgrade mod_sslUpgrade httpdUpgrade httpd-develUpgrade httpd-debuginfoUpgrade 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 mod_sslUpgrade httpd | May 9, 2023 | Mar 7, 2023 |
| Huawei Euleros 2_0_sp11 | — | Upgrade httpdUpgrade httpd-toolsUpgrade httpd-filesystemUpgrade mod_ssl | Jul 5, 2023 | Mar 7, 2023 |
| Huawei Euleros 2_0_sp5 | — | Upgrade httpd-toolsUpgrade httpd-develUpgrade mod_sessionUpgrade mod_sslUpgrade httpdUpgrade httpd-manual | Jun 9, 2023 | Mar 7, 2023 |
| Huawei Euleros 2_0_sp8 | — | Upgrade mod_sessionUpgrade httpd-toolsUpgrade mod_sslUpgrade httpdUpgrade httpd-manualUpgrade httpd-filesystemUpgrade httpd-devel | Jun 9, 2023 | Mar 7, 2023 |
| Huawei Euleros 2_0_sp9 | — | Upgrade httpd-toolsUpgrade httpdUpgrade httpd-filesystemUpgrade mod_ssl | May 10, 2023 | Mar 7, 2023 |
| Ibm Http_server | — | Apply IBM HTTP Server version 9.0.5.16 or laterApply IBM HTTP Server Interim Fix PH53014Apply IBM HTTP Server version 8.5.5.24 or later | May 16, 2024 | Apr 4, 2023 |
| Oracle_linux | — | Upgrade httpd-coreUpgrade httpdUpgrade mod_ldapUpgrade mod_sessionUpgrade httpd-manualUpgrade mod_proxy_htmlUpgrade httpd-filesystemUpgrade mod_mdUpgrade httpd-develUpgrade mod_sslUpgrade mod_luaUpgrade mod_http2Upgrade httpd-tools | Apr 5, 2023 | Mar 7, 2023 |
| Redhat_linux | — | Upgrade httpd-coreUpgrade httpd-filesystemUpgrade mod_luaUpgrade mod_sessionUpgrade httpd-manualUpgrade mod_session-debuginfoUpgrade mod_proxy_html-debuginfoUpgrade mod_md-debuginfoUpgrade mod_lua-debuginfoUpgrade httpd-debugsourceUpgrade httpd-tools-debuginfoUpgrade httpd-core-debuginfoUpgrade mod_http2Upgrade mod_ldapUpgrade mod_mdUpgrade mod_md-debugsourceUpgrade httpd-toolsUpgrade mod_proxy_htmlUpgrade mod_ldap-debuginfoUpgrade httpd-debuginfoUpgrade httpd-develUpgrade mod_ssl-debuginfoUpgrade mod_sslUpgrade httpdUpgrade mod_http2-debuginfoUpgrade mod_http2-debugsource | Apr 6, 2023 | Mar 7, 2023 |
| Rocky_linux | — | Upgrade mod_sessionUpgrade httpd-debugsourceUpgrade mod_md-debuginfoUpgrade mod_mdUpgrade mod_lua-debuginfoUpgrade httpd-develUpgrade mod_sslUpgrade httpdUpgrade httpd-debuginfoUpgrade httpd-tools-debuginfoUpgrade mod_ldap-debuginfoUpgrade mod_ldapUpgrade mod_session-debuginfoUpgrade mod_http2-debuginfoUpgrade mod_proxy_html-debuginfoUpgrade httpd-coreUpgrade mod_http2Upgrade httpd-toolsUpgrade mod_md-debugsourceUpgrade mod_http2-debugsourceUpgrade httpd-core-debuginfoUpgrade mod_proxy_htmlUpgrade mod_luaUpgrade mod_ssl-debuginfo | Mar 12, 2024 | Mar 7, 2023 |
| Suse | — | Upgrade apache2-utilsUpgrade apache2-eventUpgrade apache2-develUpgrade apache2-docUpgrade apache2Upgrade apache2-preforkUpgrade apache2-example-pagesUpgrade apache2-worker | 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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