The mod_proxy module in the Apache HTTP Server 1.3.x through 1.3.42, 2.0.x through 2.0.64, and 2.2.x through 2.2.21 does not properly interact with use of (1) RewriteRule and (2) ProxyPassMatch pattern matches for configuration of a reverse proxy, which allows remote attackers to send requests to intranet servers via a malformed URI containing an initial @ (at sign) character.
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Alpine Linux | — | Upgrade apache2 | Aug 30, 2017 | Oct 5, 2011 |
| Apache Httpd | — | Upgrade to the latest version of Apache HTTPD | Apr 12, 2012 | Oct 5, 2011 |
| Apple Osx Apache | — | Apply OS X security update 2012-004Upgrade macOS to the latest version | Sep 27, 2012 | Oct 5, 2011 |
| Apple Osx Note | — | Apply OS X security update 2012-004Upgrade macOS to the latest version | Aug 28, 2015 | Oct 5, 2011 |
| Centos_linux | — | Upgrade mod_sslUpgrade httpdUpgrade httpd-suexecUpgrade httpd-develUpgrade httpd-manual | Dec 1, 2016 | Oct 5, 2011 |
| Debian | — | Upgrade apache2 | Jul 30, 2024 | Oct 5, 2011 |
| F5 Big Ip | — | Update F5 BIG-IP to the latest version | Jun 17, 2026 | Aug 3, 2015 |
| Freebsd | — | Upgrade ru-apache-1.3Upgrade apache+mod_ssl+ipv6Upgrade apache+sslUpgrade apache+mod_perlUpgrade apacheUpgrade ru-apache+mod_sslUpgrade apache+mod_sslUpgrade apache+ipv6 | Dec 10, 2025 | Nov 14, 2011 |
| Gentoo Linux | — | Upgrade www-servers/apache. | Oct 30, 2017 | Oct 5, 2011 |
| Hpsmh | — | Upgrade to the latest version of HP System Management Homepage | Oct 13, 2015 | Oct 5, 2011 |
| Ibm Http_server | — | Apply IBM HTTP Server version 8.0.0.3 or later | Jun 22, 2018 | Oct 5, 2011 |
| Oracle_linux | — | Upgrade httpd-toolsUpgrade httpd-develUpgrade mod_sslUpgrade httpd-manualUpgrade httpd | Oct 16, 2024 | Oct 5, 2011 |
| Suse | — | Upgrade apache2-preforkUpgrade apache2-utilsUpgrade apache2Upgrade apache2-develUpgrade apache2-eventUpgrade apache2-example-pagesUpgrade apache2-workerUpgrade apache2-manualUpgrade apache2-doc | Feb 17, 2015 | Jun 28, 2013 |
| Ubuntu | — | Upgrade apache2.2-commonUpgrade apache2-mpm-itkUpgrade apache2.2-bin | Nov 8, 2024 | Oct 5, 2011 |
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