The Apache Software Foundation and the Apache HTTP Server Project are
pleased to announce the release and immediate availability of version
2.2.15 of the Apache HTTP Server ("httpd").  This version of httpd is
principally a security and bug fix release.

Notably, this release was updated to reflect the OpenSSL Project's
release 0.9.8m of the openssl library, and addresses CVE-2009-3555
(, 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

We consider this release to be the best version of httpd available, and
encourage users of all prior versions to upgrade.

Apache HTTP Server 2.2.15 is available for download from:

Please see the CHANGES_2.2 file, linked from the download page, for a
full list of changes.  A condensed list, CHANGES_2.2.15 provides the
complete list of changes since 2.2.14. A summary of security
vulnerabilities which were addressed in the previous 2.2.14 and earlier
releases is available:

Apache HTTP Server 2.2.15 is compatible with Apache Portable Runtime
(APR) versions 1.3 and 1.4, APR-util library version 1.3, and
APR-iconv library version 1.2.  The most current releases should
be used to address known security and platform bugs.  At the time of
this httpd release, the recommended APR releases are:

  * Apache Portable Runtime (APR) library version 1.4.2 (bundled),
    or at minimum, version 1.3.12
  * ARR-util library version 1.3.9 (bundled)
  * APR-iconv library version 1.2.1 (only bundled in

Older releases of these libraries have known vulnerabilities or other
defects affecting httpd.  For further information and downloads, visit:

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

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

When upgrading or installing this version of httpd, please bear in mind
that if you intend to use httpd 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.

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