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Integer overflow in the ap_pregsub function in server/util.c in the Apache HTTP Server 2.0.x through 2.0.64 and 2.2.x through 2.2.21, when the mod_setenvif module is enabled, allows local users to gain privileges via a .htaccess file with a crafted SetEnvIf directive, in conjunction with a crafted HTTP request header, leading to a heap-based buffer overflow.
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Alpine Linux | — | Upgrade apache2 | Aug 30, 2017 | Nov 8, 2011 |
| Apache Httpd | — | Upgrade to the latest version of Apache HTTPD | Apr 12, 2012 | Nov 8, 2011 |
| Apple Osx Apache | — | Upgrade macOS to the latest versionApply OS X security update 2012-004 | Sep 27, 2012 | Nov 8, 2011 |
| Apple Osx Note | — | Apply OS X security update 2012-004Upgrade macOS to the latest version | Aug 28, 2015 | Nov 8, 2011 |
| Centos_linux | — | Upgrade mod_sslUpgrade httpd-toolsUpgrade httpd-develUpgrade httpdUpgrade httpd-manual | Dec 1, 2016 | Nov 8, 2011 |
| Debian | — | Upgrade apache2 | Jul 30, 2024 | Nov 8, 2011 |
| F5 Big Ip | — | Update F5 BIG-IP to the latest version | Jun 17, 2026 | Jul 23, 2015 |
| Freebsd | — | Upgrade apache | Dec 10, 2025 | Jan 31, 2012 |
| Gentoo Linux | — | Upgrade www-servers/apache. | Oct 30, 2017 | Nov 8, 2011 |
| Hpsmh | — | Upgrade to the latest version of HP System Management Homepage | Oct 13, 2015 | Nov 8, 2011 |
| Hpux | — | Update hpuxwsAPACHE.MOD_JK2 to the latest versionUpdate hpuxwsAPACHE.APACHE to the latest versionUpdate hpuxws22APCH32.MOD_PERL to the latest versionUpdate hpuxws22APCH32.AUTH_LDAP2 to the latest versionUpdate hpuxws22APCH32.MOD_JK2 to the latest versionUpdate hpuxws22APCH32.APACHE2 to the latest versionUpdate hpuxws22APCH32.MOD_JK to the latest versionUpdate hpuxws22APCH32.AUTH_LDAP to the latest versionUpdate hpuxwsAPACHE.WEBPROXY to the latest versionUpdate hpuxwsAPACHE.AUTH_LDAP to the latest versionUpdate hpuxws22APCH32.PHP to the latest versionUpdate hpuxws22APCH32.WEBPROXY2 to the latest versionUpdate hpuxwsAPACHE.MOD_PERL2 to the latest versionUpdate hpuxws22APCH32.APACHE to the latest versionUpdate hpuxwsAPACHE.AUTH_LDAP2 to the latest versionUpdate hpuxwsAPACHE.APACHE2 to the latest versionUpdate hpuxws22APCH32.PHP2 to the latest versionUpdate hpuxwsAPACHE.PHP2 to the latest versionUpdate hpuxwsAPACHE.PHP to the latest versionUpdate hpuxws22APCH32.MOD_PERL2 to the latest versionUpdate hpuxwsAPACHE.MOD_PERL to the latest versionUpdate hpuxws22APCH32.WEBPROXY to the latest versionUpdate hpuxwsAPACHE.MOD_JK to the latest version | Aug 11, 2017 | Nov 8, 2011 |
| Ibm Http_server | — | Apply IBM HTTP Server version 8.0.0.3 or later | Jun 22, 2018 | Nov 8, 2011 |
| Oracle Solaris | — | Upgrade web/server/apache-22/documentation to version 2.2.22-0.175.0.6.0.1.0 on Solaris 11.0Upgrade web/server/apache-22 to version 2.2.22-0.175.0.6.0.1.0 on Solaris 11.0 | May 29, 2017 | Nov 8, 2011 |
| Oracle_linux | — | Upgrade mod_sslUpgrade httpd-manualUpgrade httpdUpgrade httpd-develUpgrade httpd-tools | Oct 16, 2024 | Nov 8, 2011 |
| Redhat_linux | — | No solution exists | Jul 9, 2025 | Nov 2, 2011 |
| Suse | — | Upgrade apache2-utilsUpgrade apache2-docUpgrade apache2-preforkUpgrade apache2-workerUpgrade apache2-example-pagesUpgrade apache2-eventUpgrade apache2-develUpgrade apache2-manualUpgrade apache2 | Dec 12, 2013 | Jul 9, 2013 |
| Ubuntu | — | Upgrade apache2.2-common | Nov 8, 2024 | Nov 8, 2011 |
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