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[Announce] Apache HTTP Server 2.0.55 Released
From: William A. Rowe, Jr. (wroweapache.org)
Date: Fri Oct 14 2005 - 12:48:38 CDT
Apache HTTP Server 2.0.55 Released
The Apache Software Foundation and The Apache HTTP Server Project are
pleased to announce the release of version 2.0.55 of the Apache HTTP
Server ("Apache"). This Announcement notes the significant changes
in 2.0.55 as compared to 2.0.55. This Announcement2.0 document may
also be available in multiple langages at:
This version of Apache is principally a security release. The
following potential security flaws are addressed, the first three
of which address several classes of HTTP Request and Response
core: If a request contains both Transfer-Encoding and Content-Length
headers, remove the Content-Length.
proxy_http: Correctly handle the Transfer-Encoding and Content-Length
request headers. Discard the request Content-Length whenever chunked
T-E is used, always passing one of either C-L or T-E chunked whenever
the request includes a request body.
proxy_http: If a response contains both Transfer-Encoding and a
Content-Length, remove the Content-Length and don't reuse the
mod_ssl: Fix a security issue where "SSLVerifyClient" was not
enforced in per-location context if "SSLVerifyClient optional"
was configured in the vhost configuration.
pcre: Fix integer overflows in PCRE in quantifier parsing which
could be triggered by a local user through use of a carefully
crafted regex in an .htaccess file.
Fix cases where the byterange filter would buffer responses
mod_ssl: Fix off-by-one overflow whilst printing CRL information
at "LogLevel debug" which could be triggered if configured
to use a "malicious" CRL.
The Apache HTTP Project thanks all of the reporters of these
issues and vulnerabilities for the responsible reporting and
thorough analysis of these vulnerabilities.
This release further addresses a number of cross-platform bugs,
as well as specific issues on OS/X 10.4, Win32, AIX as well as
all EBCDIC platforms, and adds compatibility with OpenSSL 0.9.8.
This release is compatible with modules compiled for 2.0.42 and
later versions. We consider this release to be the best version
of Apache available and encourage users of all prior versions to
This release includes the Apache Portable Runtime library suite
release version 0.9.7, bundled with the tar and zip distributions.
These libraries; libapr, libaprutil, and on Win32, libapriconv must
all be updated to ensure binary compatibility and address many
known platform bugs.
Apache HTTP Server 2.0.55 is available for download from
Please see the CHANGES_2.0 file, linked from the above page, for
a full list of changes. A condensed list, CHANGES_2.0.55 provides
the complete list of changes since 2.0.54, including changes to
the APR suite of libraries.
Apache 2.0 offers numerous enhancements, improvements, and performance
boosts over the 1.3 codebase. For an overview of new features introduced
after 1.3 please see
When upgrading or installing this version of Apache, please keep
in mind the following: If you intend to use Apache with one of the
threaded MPMs, you must ensure that the modules (and the libraries
they depend on) that you will be using are thread-safe. Please
refer to the documentation of these modules and libraries to obtain