Category Archives: Apache

Apache Security

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[Announce] Apache HTTP Server 2.2.29 Released

                       Apache HTTP Server 2.2.29 Released

   The Apache Software Foundation and the Apache HTTP Server Project are
   pleased to announce the release of version 2.2.29 of the Apache HTTP
   Server ("Apache"). (Note that 2.2.28 was not released). This version
   of Apache is principally a security and bug fix maintenance release,
   and addresses these specific security defects as well as other fixes;

    CVE-2014-0118 (cve.mitre.org)
     mod_deflate: The DEFLATE input filter (inflates request bodies) now
     limits the length and compression ratio of inflated request bodies to
     avoid denial of sevice via highly compressed bodies. See directives
     DeflateInflateLimitRequestBody, DeflateInflateRatioLimit,
     and DeflateInflateRatioBurst.

    CVE-2014-0231 (cve.mitre.org)
     mod_cgid: Fix a denial of service against CGI scripts that do
     not consume stdin that could lead to lingering HTTPD child processes
     filling up the scoreboard and eventually hanging the server. By
     default, the client I/O timeout (Timeout directive) now applies to
     communication with scripts. The CGIDScriptTimeout directive can be
     used to set a different timeout for communication with scripts.

    CVE-2014-0226 (cve.mitre.org)
     Fix a race condition in scoreboard handling, which could lead to
     a heap buffer overflow.

    CVE-2013-5704 (cve.mitre.org)
     HTTP trailers could be used to replace HTTP headers late during
     request processing, potentially undoing or otherwise confusing
     modules that examined or modified request headers earlier.
     Adds "MergeTrailers" directive to restore this legacy behavior.

   We consider the Apache HTTP Server 2.4 release to be the best version
   of Apache available, and encourage users of 2.2 and all prior versions
   to upgrade. This 2.2 maintenance release is offered for those unable
   to upgrade at this time. For further details, see:

     http://www.apache.org/dist/httpd/Announcement2.4.txt

   Apache HTTP Server 2.4 and 2.2.29 are available for download from:

     http://httpd.apache.org/download.cgi

   Please see the CHANGES_2.2 file, linked from the download page, for a
   full list of changes. A condensed list, CHANGES_2.2.29 includes only
   those changes introduced since the prior 2.2 release. 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 1.5.1
   and APR Utility Library (APR-util) version 1.5.3, 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.
   APR version 1.5 and APR-util version 1.5 represent minor version upgrades
   from earlier httpd 2.2 source distributions.

   This release builds on and extends the Apache 2.0 API and is superceeded
   by the Apache 2.4 API. Modules written for Apache 2.0 or 2.4 will need
   to be recompiled in order to run with Apache 2.2, and most will 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.


[ANNOUNCEMENT] Apache HTTP Server 2.4.10 Released

           Apache HTTP Server 2.4.10 Released

The Apache Software Foundation and the Apache HTTP Server Project
are pleased to announce the release of version 2.4.10 of the Apache
HTTP Server ("Apache").  This version of Apache is our latest GA
release of the new generation 2.4.x branch of Apache HTTPD and
represents fifteen years of innovation by the project, and is
recommended over all previous releases. This release of Apache is
principally a security, feature and bug fix release.

CVE-2014-0117 (cve.mitre.org)
mod_proxy: Fix crash in Connection header handling which 
allowed a denial of service attack against a reverse proxy
with a threaded MPM.

CVE-2014-3523 (cve.mitre.org)
Fix a memory consumption denial of service in the WinNT MPM (used in all Windows
installations). Workaround: AcceptFilter <protocol> {none|connect}

CVE-2014-0226 (cve.mitre.org)
Fix a race condition in scoreboard handling, which could lead to
a heap buffer overflow.

CVE-2014-0118 (cve.mitre.org)
mod_deflate: The DEFLATE input filter (inflates request bodies) now
limits the length and compression ratio of inflated request bodies to avoid
denial of sevice via highly compressed bodies.  See directives
DeflateInflateLimitRequestBody, DeflateInflateRatioLimit,
and DeflateInflateRatioBurst.

CVE-2014-0231 (cve.mitre.org)
mod_cgid: Fix a denial of service against CGI scripts that do
not consume stdin that could lead to lingering HTTPD child processes
filling up the scoreboard and eventually hanging the server.  By
default, the client I/O timeout (Timeout directive) now applies to
communication with scripts.  The CGIDScriptTimeout directive can be
used to set a different timeout for communication with scripts.

Also in this release are some exciting new features including:

*) Proxy FGI and websockets improvements
*) Proxy capability via handler
*) Finer control over scoping of RewriteRules
*) Unix Domain Socket (UDS) support for mod_proxy backends.
*) Support for larger shared memory sizes for mod_socache_shmcb
*) mod_lua and mod_ssl enhancements
*) Support named groups and backreferences within the LocationMatch,
   DirectoryMatch, FilesMatch and ProxyMatch directives.

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

Apache HTTP Server 2.4.10 is available for download from:

http://httpd.apache.org/download.cgi

Apache 2.4 offers numerous enhancements, improvements, and performance
boosts over the 2.2 codebase.  For an overview of new features
introduced since 2.4 please see:

http://httpd.apache.org/docs/trunk/new_features_2_4.html

Please see the CHANGES_2.4 file, linked from the download page, for a
full list of changes. A condensed list, CHANGES_2.4.10 includes only
those changes introduced since the prior 2.4 release.  A summary of all 
of the security vulnerabilities addressed in this and earlier releases 
is available:

http://httpd.apache.org/security/vulnerabilities_24.html

This release requires the Apache Portable Runtime (APR) version 1.5.x
and APR-Util version 1.5.x. The APR libraries must be upgraded for all
features of httpd to operate correctly.

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

http://svn.apache.org/repos/asf/httpd/httpd/trunk/VERSIONING

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.



CVE-2014-3523

Memory leak in the winnt_accept function in server/mpm/winnt/child.c in the WinNT MPM in the Apache HTTP Server 2.4.x before 2.4.10 on Windows, when the default AcceptFilter is enabled, allows remote attackers to cause a denial of service (memory consumption) via crafted requests. (CVSS:5.0) (Last Update:2014-07-23)

CVE-2013-4352

The cache_invalidate function in modules/cache/cache_storage.c in the mod_cache module in the Apache HTTP Server 2.4.6, when a caching forward proxy is enabled, allows remote HTTP servers to cause a denial of service (NULL pointer dereference and daemon crash) via vectors that trigger a missing hostname value. (CVSS:4.3) (Last Update:2014-08-04)

CVE-2014-0117

The mod_proxy module in the Apache HTTP Server 2.4.x before 2.4.10, when a reverse proxy is enabled, allows remote attackers to cause a denial of service (child-process crash) via a crafted HTTP Connection header. (CVSS:4.3) (Last Update:2014-09-04)

CVE-2014-0231

The mod_cgid module in the Apache HTTP Server before 2.4.10 does not have a timeout mechanism, which allows remote attackers to cause a denial of service (process hang) via a request to a CGI script that does not read from its stdin file descriptor. (CVSS:5.0) (Last Update:2014-09-04)

CVE-2014-0118

The deflate_in_filter function in mod_deflate.c in the mod_deflate module in the Apache HTTP Server before 2.4.10, when request body decompression is enabled, allows remote attackers to cause a denial of service (resource consumption) via crafted request data that decompresses to a much larger size. (CVSS:4.3) (Last Update:2014-09-04)

CVE-2014-0226

Race condition in the mod_status module in the Apache HTTP Server before 2.4.10 allows remote attackers to cause a denial of service (heap-based buffer overflow), or possibly obtain sensitive credential information or execute arbitrary code, via a crafted request that triggers improper scoreboard handling within the status_handler function in modules/generators/mod_status.c and the lua_ap_scoreboard_worker function in modules/lua/lua_request.c. (CVSS:6.8) (Last Update:2014-09-04)