* SECURITY: CVE-2010-1623 (cve.mitre.org)

Fix a denial of service attack against apr_brigade_split_line().

* SECURITY: CVE-2009-3560, CVE-2009-3720 (cve.mitre.org)

Fix two buffer over-read flaws in the bundled copy of expat which could cause httpd to crash while parsing specially-crafted XML documents.

It is considered to be the best version of Apache available, and they encourage users of all prior versions to upgrade.

Apache 2.2 offers numerous enhancements, improvements, and performance boosts over the 2.0 codebase.  For an overview of new features introduced since 2.0 please see:

http://httpd.apache.org/docs/2.2/new_features_2_2.html

Please see the CHANGES_2.2 file, linked from the download page, for a full list of changes.  A condensed list, CHANGES_2.2.17 provides the complete list of changes since 2.2.16.  A summary of all of the security

vulnerabilities addressed in this and earlier releases is available:

http://httpd.apache.org/security/vulnerabilities_22.html

This release includes the Apache Portable Runtime (APR) version 1.4.2 and APR Utility Library (APR-util) version 1.3.10, bundled with the tar and zip distributions.  The APR libraries libapr and libaprutil (and on Win32, libapriconv version 1.2.1) must all be updated to ensure binary compatibility and address many known security and platform bugs.

This release builds on and extends the Apache 2.0 API.  Modules written for Apache 2.0 will need to be recompiled in order to run with Apache 2.2, and require minimal or no source code changes.

When upgrading or installing this version of Apache, please bear in mind that if you intend to use Apache with one of the threaded MPMs (other than the Prefork MPM), you must ensure that any modules you will be

using (and the libraries they depend on) are thread-safe.

Notably, this release was updated to reflect the OpenSSL Project’s release 0.9.8m of the openssl library, and addresses CVE-2009-3555
(cve.mitre.org), the TLS renegotiation prefix injection attack. This release further addresses the issues CVE-2010-0408, CVE-2010-0425 and CVE-2010-0434 within mod_proxy_ajp, mod_isapi and mod_headers respectively.