-*- coding: utf-8 -*-

Changes with Apache 2.5.0

*) SECURITY: CVE-2015-0228 (cve.mitre.org)

mod_lua: A maliciously crafted websockets PING after a script

calls r:wsupgrade() can cause a child process crash.

[Edward Lu <Chaosed0 gmail.com>]

*) core: If explicitly configured, use the KeepaliveTimeout value of the

virtual host which handled the latest request on the connection, or by

default the one of the first virtual host bound to the same IP:port.

PR56226. [Yann Ylavic]

*) mod_authn_core: Add expression support to AuthName and AuthType.

[Graham Leggett]

*) mod_deflate: A misplaced check prevents limiting small bodies with the

new inflate limits. PR56872. [Edward Lu, Eric Covener, Yann Ylavic]

*) ab: Add missing longest request (100%) to CSV export.

[Marcin Fabrykowski <bugzilla fabrykowski.pl>]

*) core: Add expression support to ErrorDocument. Switch from a fixed

sized 664 byte array per merge to a hash table. [Graham Leggett]

*) mod_ssl: Add the SSL_CLIENT_CERT_RFC4523_CEA variable, which provides

a combination of certificate serialNumber and issuer as defined by

CertificateExactMatch in RFC4523. [Graham Leggett]

*) suexec: Filter out the HTTP_PROXY environment variable because it is

treated as alias for http_proxy by some programs. [Stefan Fritsch]

*) mod_proxy_http: Use the "Connection: close" header for requests to

backends not recycling connections (disablereuse), including the default

reverse and forward proxies. [Yann Ylavic]

*) mod_proxy_http: Don't expect the backend to ack the "Connection: close" to

finally close those not meant to be kept alive by SetEnv proxy-nokeepalive

or force-proxy-request-1.0, and respond with 502 instead of 400 if its

Connection header is invalid. [Yann Ylavic]

*) mod_proxy(es): Avoid error response/document handling by the core if some

input filter already did it while reading client's payload. [Yann Ylavic]

*) http: Make ap_die() robust against any HTTP error code and not modify

response status (finally logged) when nothing is to be done. [Yann Ylavic]

*) mod_proxy_connect/wstunnel: If both client and backend sides get readable

at the same time, don't lose errors occuring while forwarding on the first

side when none occurs next on the other side, and abort. [Yann Ylavic]

*) mod_lua: After a r:wsupgrade(), mod_lua was not properly

responding to a websockets PING but instead invoking the specified

script. PR57524. [Edward Lu <Chaosed0 gmail.com>]

*) mod_macro: Clear macros before initialization to avoid use-after-free

on startup or restart when the module is linked statically. PR 57525

[apache.org tech.futurequest.net, Yann Ylavic]

*) mod_proxy_http: Don't establish or reuse a backend connection before pre-

fetching the request body, so to minimize the delay between it is supposed

to be alive and the first bytes sent: this is a best effort to prevent the

backend from closing because of idle or keepalive timeout in the meantime.

Also, handle a new "proxy-flushall" environment variable which allows to

flush any forwarded body data immediately. PR 56541+37920. [Yann Ylavic]

*) core: Define and UnDefine are no longer permitted in

directory context. Previously they would always be evaulated

as the configuration was read without regard for the directory

context. [Eric Covener]

*) config: For directives that do not expect any arguments, enforce

that none are specified in the configuration file.

[Joachim Zobel <jzobel heute-morgen.de>, Eric Covener]

*) mod_ssl: 'SSLProtocol ALL' was being ignored in virtual host context.

PR 57100. [Michael Kaufmann <apache-bugzilla michael-kaufmann.ch>,

Yann Ylavic]

*) mod_alias: Introduce expression parser support for Alias, ScriptAlias

and Redirect. [Graham Leggett]

*) mod_rewrite: Improve 'bad flag delimeters' startup error by showing

how the input was tokenized. PR 56528. [Edward Lu <Chaosed0 gmail.com>]

*) mod_ssl: Add support for extracting subjectAltName entries of type

rfc822Name and dNSName into SSL_{CLIENT,SERVER}_SAN_{Email,DNS}_n

environment variables. Also addresses PR 57207. [Kaspar Brand]

*) mod_proxy: Don't put non balancer-member workers in error state by

default for connection or 500/503 errors, and honor status=+I for

any error. PR 48388. [Yann Ylavic]

*) mod_socache_memcache: Pass expiration time through to memcached. PR 55445.

[Faidon Liambotis <paravoid debian.org>, Joe Orton]

*) mod_http: Fix incorrect If-Match handling. PR 57358.

[Kunihiko Sakamoto <ksakamoto google.com>]

*) mod_proxy_ajp: Fix client connection errors handling and logged status

when it occurs. PR 56823. [Yann Ylavic]

*) ap_expr: Add filemod function for checking file modification dates

[Daniel Gruno]

*) core: Add CGIPassAuth directive to control whether HTTP authorization

headers are passed to scripts as CGI variables. PR 56855. [Jeff

Trawick]

*) mod_rewrite: Improve relative substitutions in per-directory/htaccess

context for directories found by mod_userdir and mod_alias. These no

longer require RewriteBase to be specified. [Eric Covener]

*) mod_authnz_ldap: Resolve crashes with LDAP authz and non-LDAP authn since

r1608202. [Eric Covener]

*) mod_buffer: Forward flushed input data immediatly and avoid (unlikely)

access to freed memory. [Yann Ylavic, Christophe Jaillet]

*) mod_proxy: Use the correct server name for SNI in case the backend

SSL connection itself is established via a proxy server.

PR 57139 [Szabolcs Gyurko <szabolcs gyurko.org>]

*) core: Ensure that httpd exits with an error status when the MPM fails

to run. [Yann Ylavic]

*) apreq: Content-Length header should be always interpreted as a decimal.

Leading 0 could be erroneously considered as an octal value. PR 56598.

[Chris Card <ctcard hotmail com>]

*) mod_proxy: Now allow for 191 character worker names, with non-fatal

errors if name is truncated. PR53218. [Jim Jagielski]

*) mod_ssl: Add optional function "ssl_get_tls_cb" to allow support

for channel bindings. [Simo Sorce <simo redhat.com>]

*) mod_proxy_wstunnel: Concurrent websockets messages could be

lost or delayed with ProxyWebsocketAsync enabled.

[Edward Lu <Chaosed0 gmail.com>]

*) core, mod_info: Add compiled and loaded PCRE versions to version

number display. [Rainer Jung]

*) mpm_winnt: Accept utf-8 (Unicode) service names and descriptions for

internationalization. [William Rowe]

*) mpm_winnt: Normalize the error and status messages emitted by service.c,

the service control interface for Windows. [William Rowe]

*) mod_authnz_ldap: Return LDAP connections to the pool before the handler

is run, instead of waiting until the end of the request. [Eric Covener]

*) mod_ssl: dump SSL IO/state for the write side of the connection(s),

like reads (level TRACE4). [Yann Ylavic]

*) mod_proxy: Shutdown (eg. close notify) the backend connection before

closing. [Yann Ylavic]

*) mpm_event[opt]: Send the SSL close notify alert when the KeepAliveTimeout

expires. PR54998. [Yann Ylavic]

*) mod_ssl: Ensure that the SSL close notify alert is flushed to the client.

PR54998. [Tim Kosse <tim.kosse filezilla-project.org>, Yann Ylavic]

*) mod_log_config: Add GlobalLog to allow a globally defined log to

be inherited by virtual hosts that define a CustomLog.

[Edward Lu <Chaosed0 gmail.com>]

*) MPMs: Support SO_REUSEPORT to create multiple duplicated listener

records for scalability. [Yingqi Lu <yingqi.lu@intel.com>,

Jeff Trawick, Jim Jagielski]

*) mod_proxy_html: support automatic detection of doctype and processing

of FPIs. PR56285 [Micha Lenk <micha lenk info>, Nick Kew]

*) mod_proxy_html: skip documents shorter than 4 bytes

PR 56286 [Micha Lenk <micha lenk info>]

*) mod_proxy_fdpass: Fix computation of the size of 'struct sockaddr_un'

when passed to 'connect()'.

[Graham Dumpleton <grahamd apache org>]

*) core: Add ap_mpm_resume_suspended() API to allow a suspended connection

to resume. PR56333

[Artem <artemciy gmail.com>, Edward Lu <Chaosed0 gmail.com>]

*) core: Add ap_mpm_register_socket_callback_timeout() API. [Eric Covener]

*) mod_proxy_wstunnel: Honor ProxyWebsocketIdleTimeout in asynchronous

processing mode. [Eric Covener]

*) mod_authnz_ldap: Fail explicitly when the filter is too long. Remove

unnecessary apr_pstrdup() and strlen(). [Graham Leggett]

*) Add the ldap-search option to mod_authnz_ldap, allowing authorization

to be based on arbitrary expressions that do not include the username.

[Graham Leggett]

*) Add the ldap function to the expression API, allowing LDAP filters and

distinguished names based on expressions to be escaped correctly to

guard against LDAP injection. [Graham Leggett]

*) Add module mod_ssl_ct, which provides an implementation of Certificate

Transparency (RFC 6962) for httpd. [Jeff Trawick]

*) mod_proxy: Preserve original request headers even if they differ

from the ones to be forwarded to the backend. PR 45387.

[Yann Ylavic]

*) mod_remoteip: Prevent an external proxy from presenting an internal

proxy. PR 55962. [Mike Rumph]

*) mod_ssl: Add hooks to allow other modules to perform processing at

several stages of initialization and connection handling. See

mod_ssl_openssl.h. [Jeff Trawick]

*) mod_proxy_wstunnel: Avoid sending error responses down an upgraded

websockets connection as it is being close down. [Eric Covener]

*) mod_proxy_wstunnel: Allow the administrator to cap the amount

of time a synchronous websockets connection stays idle with

ProxyWebsocketIdleTimeout. [Eric Covener]

*) mod_proxy_wstunnel: Change to opt-in for asynchronous support, adding

directives ProxyWebsocketAsync and ProxyWebsocketAsyncDelay.

[Eric Covener]

*) mod_proxy_wstunnel: Stop leaking websockets backend connections under

event MPM (trunk-only). [Eric Covener]

*) mod_proxy_http: Add detach_backend hook (potentially usable

in other proxy scheme handlers). [Jeff Trawick]

*) mod_deflate: Add DeflateAlterETag to control how the ETag

is modified. The 'NoChange' parameter mimics 2.2.x behavior.

PR 45023, PR 39727. [Eric Covener]

*) mod_rewrite: Add 'BNF' (backreferences-no-plus) flag to RewriteRule to

allow spaces in backreferences to be encoded as %20 instead of '+'.

[Eric Covener]

*) mod_rewrite: Support an optional list of characters to escape in the

argument for the 'B' (escape backreferences) flag. [Eric Covener]

*) mod_dir: Default to 2.2-like behavior and skip execution when method is

neither GET nor POST, such as for DAV requests. PR 54914. [Chris Darroch]

*) mod_rewrite: Rename the handler that does per-directory internal

redirects to "rewrite-redirect-handler" from "redirect-handler" so

it is less ambiguous and less likely to be reused. [Eric Covener]

*) mod_rewrite: Protect against looping with the [N] flag by enforcing a

default limit of 10000 iterations, and allowing each rule to change its

limit. [Eric Covener]

*) mod_ssl: Fix config merging of SSLOCSPEnable and SSLOCSPOverrideResponder.

[Jeff Trawick]

*) Add HttpContentLengthHeadZero and HttpExpectStrict directives.

[Yehuda Sadeh <yehuda inktank com>, Justin Erenkrantz]

*) mod_ssl: Add -t -DDUMP_CA_CERTS option which dumps the filenames of all

configured SSL CA certificates to stdout the same way as DUMP_CERTS does.

[Jan Kaluza]

*) mod_ssl: Don't flush when an EOS is received. Prepares mod_ssl

to support write completion. [Graham Leggett]

*) core: Add parse_errorlog_arg callback to ap_errorlog_provider

to allow providers to check the ErrorLog argument. [Jan Kaluza]

*) mod_cgid: Use the servers Timeout for each read from a CGI script,

allow override with new CGIDRequestTimeout directive. PR43494

[Eric Covener, Toshikuni Fukaya <toshikuni-fukaya cybozu co jp>]

*) core: ensure any abnormal exit is reported to stderr if it's a tty.

PR 55670 [Nick Kew]

*) mod_lua: Let the Inter-VM get/set functions work with a global

shared memory pool instead of a per-process pool. [Daniel Gruno]

*) ldap: Support ldaps when using the Microsoft LDAP SDK.

PR 54626. [Jean-Frederic Clere]

*) mod_proxy: Add ap_connection_reusable() for checking if a connection

is reusable as of this point in processing. [Jeff Trawick]

*) mod_authnz_ldap: Change default value of AuthLDAPMaxSubGroupDepth to 0

to avoid performance problems when subgroups aren't in use. [Eric Covener]

*) mod_syslog: New module implementing syslog ap_error_log provider.

Previously, this code was part of core, now it's in separate module.

[Jan Kaluza]

*) core: Add ap_errorlog_provider to make ErrorLog logging modular. Move

syslog support from core to new mod_syslog. [Jan Kaluza]

*) mod_status, mod_echo: Fix the display of client addresses.

They were truncated to 31 characters which is not enough for IPv6 addresses.

PR 54848 [Bernhard Schmidt <berni birkenwald de>]

*) core: Add ap_log_data(), ap_log_rdata(), etc. for logging buffers.

[Jeff Trawick]

*) mod_unique_id: Use output of the PRNG rather than IP address and

pid, avoiding sleep() call and possible DNS issues at startup,

plus improving randomness for IPv6-only hosts.

[Jan Kaluza <jkaluza redhat.com>]

*) mod_authnz_ldap: Support primitive LDAP servers that do not accept

filters, such as "SDBM-backed LDAP" on z/OS, by allowing a special

filter "none" to be specified in AuthLDAPURL. [Eric Covener]

*) mod_file_cache: mod_file_cache should be able to serve files that

haven't had a Content-Type set via e.g. mod_mime. [Eric Covener]

*) core: merge AllowEncodedSlashes from the base configuration into

virtual hosts. [Eric Covener]

*) AIX: Install DSO's with "cp" instead of "install" in instdso.sh

[Eric Covener]

*) mod_ldap: Don't keep retrying if a new LDAP connection times out.

[Eric Covener]

*) mod_deflate: permit compilation of mod_deflate against a zlib that has

been configured with -D Z_PREFIX, which redefines the token "deflate".

[Eric Covener]

*) mod_auth_digest: Use the secret when generating nonces in all cases and

not only when AuthName is used in .htaccess files (this change may cause

problems if used with round robin load balancers). Don't regenerate the

secret on graceful restarts. PR 54637 [Stefan Fritsch]

*) core: Remove apr_brigade_flatten(), buffering and duplicated code

from the HTTP_IN filter, parse chunks in a single pass with zero copy.

Reduce memory usage by 48 bytes per request. [Graham Leggett]

*) core: Stop the HTTP_IN filter from attempting to write error buckets

to the output filters, which is bogus in the proxy case. Create a

clean mapping from APR codes to HTTP status codes, and use it where

needed. [Graham Leggett]

*) mod_proxy: Ensure network errors detected by the proxy are returned as

504 Gateway Timout as opposed to 502 Bad Gateway, in order to be

compliant with RFC2616 14.9.4 Cache Revalidation and Reload Controls.

*) mod_dav: mod_dav overrides dav_fs response on PUT failure. PR 35981

[Basant Kumar Kukreja <basant.kukreja sun.com>, Alejandro Alvarez

<alejandro.alvarez.ayllon cern.ch>]

*) mod_ldap: LDAP connections used for authentication were not respecting

LDAPConnectionPoolTimeout. PR 54587

*) core: ap_rgetline_core now pulls from r->proto_input_filters.

*) mod_proxy_html: process parsed comments immediately.

Fixes bug where parsed comments may be lost. [Nick Kew]

*) mod_proxy_html: introduce doctype for HTML 5 [Nick Kew]

*) mod_proxy_html: fix typo-bug processing "strict" vs "transitional"

HTML/XHTML [Nick Kew]

*) core: Add option to add valgrind support. Use it to reduce false positive

warnings in mod_ssl. [Stefan Fritsch]

*) mod_authn_file, mod_authn_dbd, mod_authn_dbm, mod_authn_socache:

Cache the result of the most recent password hash verification for every

keep-alive connection. This saves some expensive calculations.

[Stefan Fritsch]

*) http: Remove support for Request-Range header sent by Navigator 2-3 and

MSIE 3. [Stefan Fritsch]

*) core, http: Extend HttpProtocol with an option to enforce stricter HTTP

conformance or to only log the found problems. [Stefan Fritsch]

*) core: Correctly parse an IPv6 literal host specification in an absolute

URL in the request line. [Stefan Fritsch]

*) EventOpt MPM

*) core: Add LogLevelOverride directive that allows to override the

loglevel for clients from certain IPs. This also works for things

like the SSL handshake where <If> LogLevel ... </If> is evaluated

too late. [Stefan Fritsch]

*) core: Add new directive Warning to issue warnings from a configuration

file. Both Warning and Error now generate a timestamped log message.

[Fabien Coelho]

*) ap_expr: Add SERVER_PROTOCOL_VERSION, ..._MAJOR, and ..._MINOR

variables. [Stefan Fritsch]

*) core: New directive RegisterHttpMethod for registering non-standard

HTTP methods. [Stefan Fritsch]

*) core: New directive HttpProtocol which allows to disable HTTP/0.9

support. [Stefan Fritsch]

*) mod_allowhandlers: New module to forbid specific handlers for specific

directories. [Stefan Fritsch]

*) mod_systemd: New module, for integration with systemd on Linux.

[Jan Kaluza <jkaluza redhat.com>]

*) WinNT MPM: Store pid and generation for each thread in scoreboard

to allow tracking of threads from exiting children via mod_status

or other such mechanisms. [Jeff Trawick]

*) The following now respect DefaultRuntimeDir/DEFAULT_REL_RUNTIMEDIR:

- APIs: ap_log_pid(), ap_remove_pid, ap_read_pid()

- core: the scoreboard (ScoreBoardFile), pid file (PidFile), and

mutexes (Mutex)

- mod_cache: thundering herd lock directory

- mod_lbmethod_heartbeat, mod_heartmonitor: heartbeat storage file

- mod_ldap: shared memory cache

- mod_socache_shmcb, mod_socache_dbm: shared memory or dbm for cache

[Jeff Trawick]

*) suexec: Add --enable-suexec-capabilites support on Linux, to use

setuid/setgid capability bits rather than a setuid root binary.

[Joe Orton]

*) suexec: Add support for logging to syslog as an alternative to logging

to a file; configure --without-suexec-logfile --with-suexec-syslog.

[Joe Orton]

*) mod_ssl: Add support for TLS Next Protocol Negotiation. PR 52210.

[Matthew Steele <mdsteele google.com>]

*) cross-compile: allow to provide CC_FOR_BUILD so that gen_test_char will

be compiled by the build compiler instead of the host compiler.

Also set CC_FOR_BUILD to 'cc' when cross-compilation is detected.

PR 51257. [Guenter Knauf]

*) core: In maintainer mode, replace apr_palloc with a version that

initializes the allocated memory with non-zero values, except if

AP_DEBUG_NO_ALLOC_POISON is defined. [Stefan Fritsch]

*) mod_policy: Add a new testing module to help server administrators

enforce a configurable level of protocol compliance on their

servers and application servers behind theirs. [Graham Leggett]

*) mod_firehose: Add a new debugging module able to record traffic

passing through the server in such a way that connections and/or

requests be reconstructed and replayed. [Graham Leggett]

*) mod_noloris

*) APREQ

*) Simple MPM

*) mod_serf

[Apache 2.5.0-dev includes those bug fixes and changes with the

Apache 2.4.xx tree as documented below, except as noted.]

Changes with Apache 2.4.x and later:

*) http://svn.apache.org/viewvc/httpd/httpd/branches/2.4.x/CHANGES?view=markup

Changes with Apache 2.2.x and later:

*) http://svn.apache.org/viewvc/httpd/httpd/branches/2.2.x/CHANGES?view=markup

Changes with Apache 2.0.x and later:

*) http://svn.apache.org/viewvc/httpd/httpd/branches/2.0.x/CHANGES?view=markup