Apache HTTP Server（简称Apache）是Apache软件基金会的一个开放源码的网页服务器，可以在大多数计算机操作系统中运行，由于其跨平台和安全性被广泛 使用，是最流行的Web服务器端软件之一。它快速、可靠并且可通过简单的API扩充，将Perl／Python等解释器编译到服务器中。

http://www.apache.org/dist/httpd/httpd-2.2.15.tar.bz2
http://www.apache.org/dist/httpd/binaries/win32/httpd-2.2.15-win32-x86-openssl-0.9.8m.msi  (Windows)

Changes with Apache 2.2.15

*) SECURITY: CVE-2009-3555 (cve.mitre.org)
mod_ssl: Comprehensive fix of the TLS renegotiation prefix injection
attack when compiled against OpenSSL version 0.9.8m or later. Introduces
the 'SSLInsecureRenegotiation' directive to reopen this vulnerability
and offer unsafe legacy renegotiation with clients which do not yet
support the new secure renegotiation protocol, RFC 5746.
[Joe Orton, and with thanks to the OpenSSL Team]

*) SECURITY: CVE-2009-3555 (cve.mitre.org)
mod_ssl: A partial fix for the TLS renegotiation prefix injection attack
by rejecting any client-initiated renegotiations. Forcibly disable
keepalive for the connection if there is any buffered data readable. Any
configuration which requires renegotiation for per-directory/location
access control is still vulnerable, unless using OpenSSL >= 0.9.8l.
[Joe Orton, Ruediger Pluem, Hartmut Keil <Hartmut.Keil adnovum.ch>]

*) SECURITY: CVE-2010-0408 (cve.mitre.org)
mod_proxy_ajp: Respond with HTTP_BAD_REQUEST when the body is not sent
when request headers indicate a request body is incoming; not a case of
HTTP_INTERNAL_SERVER_ERROR. [Niku Toivola <niku.toivola sulake.com>]

*) SECURITY: CVE-2010-0425 (cve.mitre.org)
mod_isapi: Do not unload an isapi .dll module until the request
processing is completed, avoiding orphaned callback pointers.
[Brett Gervasoni <brettg senseofsecurity.com>, Jeff Trawick]

*) SECURITY: CVE-2010-0434 (cve.mitre.org)
Ensure each subrequest has a shallow copy of headers_in so that the
parent request headers are not corrupted. Elimiates a problematic
optimization in the case of no request body. PR 48359
[Jake Scott, William Rowe, Ruediger Pluem]

*) mod_reqtimeout: New module to set timeouts and minimum data rates for
receiving requests from the client. [Stefan Fritsch]

*) mod_proxy_ajp: Really regard the operation a success, when the client
aborted the connection. In addition adjust the log message if the client
aborted the connection. [Ruediger Pluem]

*) mod_negotiation: Preserve query string over multiviews negotiation.
This buglet was fixed for type maps in 2.2.6, but the same issue
affected multiviews and was overlooked.
PR 33112 [Joergen Thomsen <apache jth.net>]

*) mod_cache: Introduce the thundering herd lock, a mechanism to keep
the flood of requests at bay that strike a backend webserver as
a cached entity goes stale. [Graham Leggett]

*) mod_proxy_http: Make sure that when an ErrorDocument is served
from a reverse proxied URL, that the subrequest respects the status
of the original request. This brings the behaviour of proxy_handler
in line with default_handler. PR 47106. [Graham Leggett]

*) mod_log_config: Add the R option to log the handler used within the
request. [Christian Folini <christian.folini netnea com>]

*) mod_include: Allow fine control over the removal of Last-Modified and
ETag headers within the INCLUDES filter, making it possible to cache
responses if desired. Fix the default value of the SSIAccessEnable
directive. [Graham Leggett]

*) mod_ssl: Fix a potential I/O hang if a long list of trusted CAs
is configured for client cert auth. PR 46952. [Joe Orton]

*) core: Fix potential memory leaks by making sure to not destroy
bucket brigades that have been created by earlier filters.
[Stefan Fritsch]

*) mod_authnz_ldap: Add AuthLDAPBindAuthoritative to allow Authentication to
try other providers in the case of an LDAP bind failure.
PR 46608 [Justin Erenkrantz, Joe Schaefer, Tony Stevenson]

*) mod_proxy, mod_proxy_http: Support remote https proxies
by using HTTP CONNECT.
PR 19188. [Philippe Dutrueux <lilas evidian.com>, Rainer Jung]

*) worker: Don't report server has reached MaxClients until it has.
Add message when server gets within MinSpareThreads of MaxClients.
PR 46996. [Dan Poirier]

*) mod_ssl: When extracting certificate subject/issuer names to the
SSL_*_DN_* variables, handle RDNs with duplicate tags by
exporting multiple varialables with an "_n" integer suffix.
PR 45875. [Joe Orton, Peter Sylvester <peter.sylvester edelweb.fr>]

*) mod_authnz_ldap: Failures to map a username to a DN, or to check a user
password now result in an informational level log entry instead of
warning level. [Eric Covener]

*) core: Preserve Port information over internal redirects
PR 35999 [Jonas Ringh <jonas.ringh cixit.se>]

*) mod_filter: fix FilterProvider matching where "dispatch" string
doesn't exist.
PR 48054 [<tietw gmail.com>]

*) Build: fix --with-module to work as documented
PR 43881 [Gez Saunders <gez.saunders virgin.net>]

*) mod_mime: Make RemoveType override the info from TypesConfig.
PR 38330. [Stefan Fritsch]

*) mod_proxy: unable to connect to a backend is SERVICE_UNAVAILABLE,
rather than BAD_GATEWAY or (especially) NOT_FOUND.
PR 46971 [evanc nortel.com]

*) mod_charset_lite: Honor 'CharsetOptions NoImplicitAdd'.
[Eric Covener]

*) mod_ldap: If LDAPSharedCacheSize is too small, try harder to purge
some cache entries and log a warning. Also increase the default
LDAPSharedCacheSize to 500000. This is a more realistic size suitable
for the default values of 1024 for LdapCacheEntries/LdapOpCacheEntries.
PR 46749. [Stefan Fritsch]

*) mod_disk_cache, mod_mem_cache: don't cache incomplete responses,
per RFC 2616, 13.8. PR15866. [Dan Poirier]

*) mod_rewrite: Make sure that a hostname:port isn't fully qualified if
the request is a CONNECT request. PR 47928
[Bill Zajac <billz consultla.com>]

*) mod_cache: correctly consider s-maxage in cacheability
decisions. [Dan Poirier]

*) core: Return APR_EOF if request body is shorter than the length announced
by the client. PR 33098 [ Stefan Fritsch <sf sfritsch.de>]

*) mod_rewrite: Add scgi scheme detection. [André Malo]

*) mod_mime: Detect invalid use of MultiviewsMatch inside Location and
LocationMatch sections. PR 47754. [Dan Poirier]

*) ab, mod_ssl: Restore compatibility with OpenSSL < 0.9.7g.
[Guenter Knauf]