2 Changes with Apache 2.5.0
4 *) mod_ssl: add SSLPolicy (define/use) and SSLProxyPolicy directives plus documentation. Add
5 core definitions for policies 'modern', 'intermediate' and 'old', as defined by Mozilla
6 in <https://wiki.mozilla.org/Security/Server_Side_TLS>. [Stefan Eissing]
8 *) mod_proxy: Fix ProxyAddHeaders merging. [Joe Orton]
10 *) mod_md: new module for managing domains across VirtualHosts with ACME protocol
11 implementation for automated certificate signup and renewal. Default CA is
12 the test area of Let's Encrypt right now, so certificates root will not be valid.
13 Will be switched to the real service endpoint rather soon. If you need it now,
14 configure 'MDCertificateAuthority https://acme-v01.api.letsencrypt.org/directory'.
17 *) mod_ssl, ab: Fix compatibility with LibreSSL. PR 61184.
18 [Bernard Spil <brnrd freebsd.org>, Yann Ylavic]
20 *) event: Avoid possible blocking in the listener thread when shutting down
21 connections. PR 60956. [Yann Ylavic]
23 *) mod_proxy_fcgi: Add the support for mod_proxy's flushpackets and flushwait
24 parameters. [Luca Toscano, Ruediger Pluem, Yann Ylavic]
26 *) mod_proxy_wstunnel: Fix detection of unresponded request which could have
27 led to spurious HTTP 502 error messages sent on upgrade connections.
28 PR 61283. [Yann Ylavic]
30 *) mod_http2: Simplify ready queue, less memory and better performance. Update
31 mod_http2 version to 1.10.7. [Stefan Eissing]
33 *) htpasswd / htdigest: Do not apply the strict permissions of the temporary
34 passwd file to a possibly existing passwd file. PR 61240. [Ruediger Pluem]
36 *) mod_rewrite: Add 'RewriteOptions LongURLOptimization' to free memory
37 from each set of unmatched rewrite conditions.
40 *) Allow the argument to <IfFile>, <IfDefine>, <IfSection>, <IfDirective>,
41 and <IfModule> to be quoted. This is primarily for the benefit of
42 <IfFile>. [Eric Covener]
44 *) Introduce request taint checking framework to prevent privilege
45 hijacking through .htaccess. [Nick Kew]
47 *) core: Disallow multiple Listen on the same IP:port when listener buckets
48 are configured (ListenCoresBucketsRatio > 0), consistently with the single
49 bucket case (default), thus avoiding the leak of the corresponding socket
50 descriptors on graceful restart. [Yann Ylavic]
52 *) Add <IfDirective> and <IfSection> directives. [Joe Orton]
54 *) mod_syslog: Support use of optional "tag" in syslog entries.
55 PR 60525. [Ben Rubson <ben.rubson gmail.com>, Jim Jagielski]
57 *) When using mod_status with the Event MPM, report the number of requests
58 associated with an active connection in the "ACC" field. Previously
59 zero was always reported with this MPM. PR60647. [Eric Covener]
61 *) mod_remoteip: Add support for PROXY protocol (code donated by Cloudzilla).
62 Add ability for PROXY protocol processing to be optional to donated code.
63 See also: http://www.haproxy.org/download/1.5/doc/proxy-protocol.txt
64 [Cloudzilla/roadrunner2@GitHub, Jim Jagielski, Daniel Ruggeri]
66 *) mod_remoteip: When overriding the useragent address from X-Forwarded-For,
67 zero out what had been initialized as the connection-level port. PR59931.
68 [Hank Ibell <hwibell gmail.com>]
70 *) mod_proxy_wstunnel: Reliably run before mod_proxy_http.
73 *) mod_proxy_protocol: Add server-side, front-end support for PROXY PROTOCOL
74 (http://blog.haproxy.com/haproxy/proxy-protocol/). [roadrunner2]
76 *) http: Allow unknown response status' lines returned in the form of
77 "HTTP/x.x xxx Status xxx". [Yann Ylavic]
79 *) core: Add <IfFile> configuration section to allow any file on disk to be
80 used as a conditional. [Edward Lu, Eric Covener]
82 *) event: Avoid listener periodic wake ups by using the pollset wake-ability
83 when available. PR 57399. [Yann Ylavic, Luca Toscano]
85 *) mod_crypto: Add the all purpose crypto filters with support for HLS.
88 *) core: Drop an invalid Last-Modified header value coming
89 from a FCGI/CGI script instead of replacing it with Unix epoch.
90 Warn the users about Last-Modified header value replacements
91 and violations of the RFC.
92 [Yann Ylavic, Luca Toscano, William Rowe, Jacob Champion]
94 *) mod_dav: Allow other modules to become providers and add ACLs
96 [Jari Urpalainen <jari.urpalainen nokia.com>, Graham Leggett]
98 *) mod_dav: Add dav_begin_multistatus, dav_send_one_response,
99 dav_finish_multistatus, dav_send_multistatus, dav_handle_err,
100 dav_failed_proppatch, dav_success_proppatch to mod_dav.h.
101 [Jari Urpalainen <jari.urpalainen nokia.com>, Graham Leggett]
103 *) mod_proxy, mod_ssl: Handle SSLProxy* directives in <Proxy> sections,
104 allowing per backend TLS configuration. [Yann Ylavic]
106 *) core: explicitly exclude 'h2' from protocols announced via an Upgrade:
107 header as commanded by http-wg. [Stefan Eissing]
109 *) mod_proxy_ajp: Add "secret" parameter to proxy workers to implement legacy
110 AJP13 authentication. PR 53098. [Dmitry A. Bakshaev <dab1818 gmail com>]
112 *) mpm: Generalise the ap_mpm_register_socket functions to accept pipes
113 or sockets. [Graham Leggett]
115 *) core: Extend support for setting aside data from the network input filter
116 to any connection or request input filter. [Graham Leggett]
118 *) core: Split ap_create_request() from ap_read_request(). [Graham Leggett]
120 *) mod_auth_digest: Fix compatibility with expression-based Authname. PR59039.
123 *) mpm: Add a complete_connection hook that confirms whether an MPM is allowed
124 to leave the WRITE_COMPLETION phase. Move filter code out of the MPMs.
127 *) core: Added support for HTTP code 451. PR58985.
128 [Yehuda Katz <yehuda ymkatz.net>, Jim Jagielski]
130 *) mod_filter: Fix AddOutputFilterByType with non-content-level filters.
131 PR58856 [Micha Lenk <micha lenk.info>]
133 *) mod_cache: Consider Cache-Control: s-maxage in expiration
134 calculations. [Eric Covener]
136 *) mod_cache: Allow caching of responses with an Expires header
137 in the past that also has Cache-Control: max-age or s-maxage.
138 PR55156. [Eric Covener]
140 *) Added many log numbers to log statements that had none.
142 *) mod_session: Introduce SessionExpiryUpdateInterval which allows to
143 configure the session/cookie expiry's update interval. PR 57300.
144 [Paul Spangler <paul.spangler ni.com>]
146 *) core: Extend support for asynchronous write completion from the
147 network filter to any connection or request filter. [Graham Leggett]
149 *) mod_auth_digest: remove AuthDigestEnableQueryStringHack which is no
150 more documented since dec 2012 (r1415960). [Christophe Jaillet]
152 *) mod_charset_lite: On EBCDIC platforms, make sure mod_charset_lite runs
153 after other resource-level filters. [Eric Covener]
155 *) http: Don't remove the Content-Length of zero from a HEAD response if
156 it comes from an origin server, module or script. [Yann Ylavic]
158 *) http: Add support for RFC2324/RFC7168. [Graham Leggett]
160 *) mod_rewrite: Add support for starting External Rewriting Programs
161 as non-root user on UNIX systems by specifying username and group name
162 as third argument of RewriteMap directive. [Jan Kaluza]
164 *) mod_authn_core: Add expression support to AuthName and AuthType.
167 *) suexec: Filter out the HTTP_PROXY environment variable because it is
168 treated as alias for http_proxy by some programs. [Stefan Fritsch]
170 *) mod_proxy_http: Don't establish or reuse a backend connection before pre-
171 fetching the request body, so to minimize the delay between it is supposed
172 to be alive and the first bytes sent: this is a best effort to prevent the
173 backend from closing because of idle or keepalive timeout in the meantime.
174 Also, handle a new "proxy-flushall" environment variable which allows to
175 flush any forwarded body data immediately. PR 56541+37920. [Yann Ylavic]
177 *) core: Define and UnDefine are no longer permitted in
178 directory context. Previously they would always be evaulated
179 as the configuration was read without regard for the directory
180 context. [Eric Covener]
182 *) config: For directives that do not expect any arguments, enforce
183 that none are specified in the configuration file.
184 [Joachim Zobel <jzobel heute-morgen.de>, Eric Covener]
186 *) mod_rewrite: Improve 'bad flag delimeters' startup error by showing
187 how the input was tokenized. PR 56528. [Edward Lu <Chaosed0 gmail.com>]
189 *) mod_proxy: Don't put non balancer-member workers in error state by
190 default for connection or 500/503 errors, and honor status=+I for
191 any error. PR 48388. [Yann Ylavic]
193 *) mod_socache_memcache: Pass expiration time through to memcached. PR 55445.
194 [Faidon Liambotis <paravoid debian.org>, Joe Orton]
196 *) ap_expr: Add filemod function for checking file modification dates
199 *) mod_authnz_ldap: Resolve crashes with LDAP authz and non-LDAP authn since
200 r1608202. [Eric Covener]
202 *) apreq: Content-Length header should be always interpreted as a decimal.
203 Leading 0 could be erroneously considered as an octal value. PR 56598.
204 [Chris Card <ctcard hotmail com>]
206 *) mod_proxy: Now allow for 191 character worker names, with non-fatal
207 errors if name is truncated. PR53218. [Jim Jagielski]
209 *) mod_ssl: Add optional function "ssl_get_tls_cb" to allow support
210 for channel bindings. [Simo Sorce <simo redhat.com>]
212 *) mod_proxy_wstunnel: Concurrent websockets messages could be
213 lost or delayed with ProxyWebsocketAsync enabled.
214 [Edward Lu <Chaosed0 gmail.com>]
216 *) core, mod_info: Add compiled and loaded PCRE versions to version
217 number display. [Rainer Jung]
219 *) mod_authnz_ldap: Return LDAP connections to the pool before the handler
220 is run, instead of waiting until the end of the request. [Eric Covener]
222 *) mod_proxy_html: support automatic detection of doctype and processing
223 of FPIs. PR56285 [Micha Lenk <micha lenk info>, Nick Kew]
225 *) mod_proxy_html: skip documents shorter than 4 bytes
226 PR 56286 [Micha Lenk <micha lenk info>]
228 *) mod_proxy_fdpass: Fix computation of the size of 'struct sockaddr_un'
229 when passed to 'connect()'.
230 [Graham Dumpleton <grahamd apache org>]
232 *) core: Add ap_mpm_resume_suspended() API to allow a suspended connection
234 [Artem <artemciy gmail.com>, Edward Lu <Chaosed0 gmail.com>]
236 *) core: Add ap_mpm_register_socket_callback_timeout() API. [Eric Covener]
238 *) mod_proxy_wstunnel: Honor ProxyWebsocketIdleTimeout in asynchronous
239 processing mode. [Eric Covener]
241 *) mod_authnz_ldap: Fail explicitly when the filter is too long. Remove
242 unnecessary apr_pstrdup() and strlen(). [Graham Leggett]
244 *) Add the ldap-search option to mod_authnz_ldap, allowing authorization
245 to be based on arbitrary expressions that do not include the username.
248 *) Add the ldap function to the expression API, allowing LDAP filters and
249 distinguished names based on expressions to be escaped correctly to
250 guard against LDAP injection. [Graham Leggett]
252 *) Add module mod_ssl_ct, which provides an implementation of Certificate
253 Transparency (RFC 6962) for httpd. [Jeff Trawick]
255 *) mod_proxy_wstunnel: Avoid sending error responses down an upgraded
256 websockets connection as it is being close down. [Eric Covener]
258 *) mod_proxy_wstunnel: Allow the administrator to cap the amount
259 of time a synchronous websockets connection stays idle with
260 ProxyWebsocketIdleTimeout. [Eric Covener]
262 *) mod_proxy_wstunnel: Change to opt-in for asynchronous support, adding
263 directives ProxyWebsocketAsync and ProxyWebsocketAsyncDelay.
266 *) mod_proxy_wstunnel: Stop leaking websockets backend connections under
267 event MPM (trunk-only). [Eric Covener]
269 *) mod_proxy_http: Add detach_backend hook (potentially usable
270 in other proxy scheme handlers). [Jeff Trawick]
272 *) mod_deflate: Add DeflateAlterETag to control how the ETag
273 is modified. The 'NoChange' parameter mimics 2.2.x behavior.
274 PR 45023, PR 39727. [Eric Covener]
276 *) mod_rewrite: Add 'BNF' (backreferences-no-plus) flag to RewriteRule to
277 allow spaces in backreferences to be encoded as %20 instead of '+'.
280 *) mod_rewrite: Support an optional list of characters to escape in the
281 argument for the 'B' (escape backreferences) flag. [Eric Covener]
283 *) mod_dir: Default to 2.2-like behavior and skip execution when method is
284 neither GET nor POST, such as for DAV requests. PR 54914. [Chris Darroch]
286 *) mod_rewrite: Rename the handler that does per-directory internal
287 redirects to "rewrite-redirect-handler" from "redirect-handler" so
288 it is less ambiguous and less likely to be reused. [Eric Covener]
290 *) mod_rewrite: Protect against looping with the [N] flag by enforcing a
291 default limit of 10000 iterations, and allowing each rule to change its
292 limit. [Eric Covener]
294 *) mod_ssl: Fix config merging of SSLOCSPEnable and SSLOCSPOverrideResponder.
297 *) Add HttpContentLengthHeadZero and HttpExpectStrict directives.
298 [Yehuda Sadeh <yehuda inktank com>, Justin Erenkrantz]
300 *) mod_ssl: Add -t -DDUMP_CA_CERTS option which dumps the filenames of all
301 configured SSL CA certificates to stdout the same way as DUMP_CERTS does.
304 *) mod_ssl: Don't flush when an EOS is received. Prepares mod_ssl
305 to support write completion. [Graham Leggett]
307 *) core: Add parse_errorlog_arg callback to ap_errorlog_provider
308 to allow providers to check the ErrorLog argument. [Jan Kaluza]
310 *) mod_cgid: Use the servers Timeout for each read from a CGI script,
311 allow override with new CGIDRequestTimeout directive. PR43494
312 [Eric Covener, Toshikuni Fukaya <toshikuni-fukaya cybozu co jp>]
314 *) core: ensure any abnormal exit is reported to stderr if it's a tty.
317 *) mod_lua: Let the Inter-VM get/set functions work with a global
318 shared memory pool instead of a per-process pool. [Daniel Gruno]
320 *) ldap: Support ldaps when using the Microsoft LDAP SDK.
321 PR 54626. [Jean-Frederic Clere]
323 *) mod_authnz_ldap: Change default value of AuthLDAPMaxSubGroupDepth to 0
324 to avoid performance problems when subgroups aren't in use. [Eric Covener]
326 *) mod_syslog: New module implementing syslog ap_error_log provider.
327 Previously, this code was part of core, now it's in separate module.
330 *) core: Add ap_errorlog_provider to make ErrorLog logging modular. Move
331 syslog support from core to new mod_syslog. [Jan Kaluza]
333 *) mod_status, mod_echo: Fix the display of client addresses.
334 They were truncated to 31 characters which is not enough for IPv6 addresses.
335 PR 54848 [Bernhard Schmidt <berni birkenwald de>]
337 *) mod_unique_id: Use output of the PRNG rather than IP address and
338 pid, avoiding sleep() call and possible DNS issues at startup,
339 plus improving randomness for IPv6-only hosts.
340 [Jan Kaluza <jkaluza redhat.com>]
342 *) mod_file_cache: mod_file_cache should be able to serve files that
343 haven't had a Content-Type set via e.g. mod_mime. [Eric Covener]
345 *) core: merge AllowEncodedSlashes from the base configuration into
346 virtual hosts. [Eric Covener]
348 *) AIX: Install DSO's with "cp" instead of "install" in instdso.sh
351 *) mod_ldap: Don't keep retrying if a new LDAP connection times out.
354 *) mod_deflate: permit compilation of mod_deflate against a zlib that has
355 been configured with -D Z_PREFIX, which redefines the token "deflate".
358 *) mod_auth_digest: Use the secret when generating nonces in all cases and
359 not only when AuthName is used in .htaccess files (this change may cause
360 problems if used with round robin load balancers). Don't regenerate the
361 secret on graceful restarts. PR 54637 [Stefan Fritsch]
363 *) core: Remove apr_brigade_flatten(), buffering and duplicated code
364 from the HTTP_IN filter, parse chunks in a single pass with zero copy.
365 Reduce memory usage by 48 bytes per request. [Graham Leggett]
367 *) core: Stop the HTTP_IN filter from attempting to write error buckets
368 to the output filters, which is bogus in the proxy case. Create a
369 clean mapping from APR codes to HTTP status codes, and use it where
370 needed. [Graham Leggett]
372 *) mod_proxy: Ensure network errors detected by the proxy are returned as
373 504 Gateway Timout as opposed to 502 Bad Gateway, in order to be
374 compliant with RFC2616 14.9.4 Cache Revalidation and Reload Controls.
376 *) mod_dav: mod_dav overrides dav_fs response on PUT failure. PR 35981
377 [Basant Kumar Kukreja <basant.kukreja sun.com>, Alejandro Alvarez
378 <alejandro.alvarez.ayllon cern.ch>]
380 *) mod_ldap: LDAP connections used for authentication were not respecting
381 LDAPConnectionPoolTimeout. PR 54587
383 *) core: ap_rgetline_core now pulls from r->proto_input_filters.
385 *) mod_proxy_html: process parsed comments immediately.
386 Fixes bug where parsed comments may be lost. [Nick Kew]
388 *) mod_proxy_html: introduce doctype for HTML 5 [Nick Kew]
390 *) mod_proxy_html: fix typo-bug processing "strict" vs "transitional"
391 HTML/XHTML [Nick Kew]
393 *) core: Add option to add valgrind support. Use it to reduce false positive
394 warnings in mod_ssl. [Stefan Fritsch]
396 *) mod_authn_file, mod_authn_dbd, mod_authn_dbm, mod_authn_socache:
397 Cache the result of the most recent password hash verification for every
398 keep-alive connection. This saves some expensive calculations.
401 *) http: Remove support for Request-Range header sent by Navigator 2-3 and
402 MSIE 3. [Stefan Fritsch]
404 *) core, http: Extend HttpProtocol with an option to enforce stricter HTTP
405 conformance or to only log the found problems. [Stefan Fritsch]
407 *) core: Correctly parse an IPv6 literal host specification in an absolute
408 URL in the request line. [Stefan Fritsch]
412 *) core: Add LogLevelOverride directive that allows to override the
413 loglevel for clients from certain IPs. This also works for things
414 like the SSL handshake where <If> LogLevel ... </If> is evaluated
415 too late. [Stefan Fritsch]
417 *) core: Add new directive Warning to issue warnings from a configuration
418 file. Both Warning and Error now generate a timestamped log message.
421 *) ap_expr: Add SERVER_PROTOCOL_VERSION, ..._MAJOR, and ..._MINOR
422 variables. [Stefan Fritsch]
424 *) core: New directive RegisterHttpMethod for registering non-standard
425 HTTP methods. [Stefan Fritsch]
427 *) core: New directive HttpProtocol which allows to disable HTTP/0.9
428 support. [Stefan Fritsch]
430 *) mod_allowhandlers: New module to forbid specific handlers for specific
431 directories. [Stefan Fritsch]
433 *) mod_systemd: New module, for integration with systemd on Linux.
434 [Jan Kaluza <jkaluza redhat.com>]
436 *) WinNT MPM: Store pid and generation for each thread in scoreboard
437 to allow tracking of threads from exiting children via mod_status
438 or other such mechanisms. [Jeff Trawick]
440 *) The following now respect DefaultRuntimeDir/DEFAULT_REL_RUNTIMEDIR:
441 - APIs: ap_log_pid(), ap_remove_pid, ap_read_pid()
442 - mod_cache: thundering herd lock directory
443 - mod_lbmethod_heartbeat, mod_heartmonitor: heartbeat storage file
444 - mod_ldap: shared memory cache
445 - mod_socache_shmcb, mod_socache_dbm: shared memory or dbm for cache
448 *) suexec: Add --enable-suexec-capabilites support on Linux, to use
449 setuid/setgid capability bits rather than a setuid root binary.
452 *) suexec: Add support for logging to syslog as an alternative to logging
453 to a file; configure --without-suexec-logfile --with-suexec-syslog.
456 *) mod_ssl: Add support for TLS Next Protocol Negotiation. PR 52210.
457 [Matthew Steele <mdsteele google.com>]
459 *) cross-compile: allow to provide CC_FOR_BUILD so that gen_test_char will
460 be compiled by the build compiler instead of the host compiler.
461 Also set CC_FOR_BUILD to 'cc' when cross-compilation is detected.
462 PR 51257. [Guenter Knauf]
464 *) core: In maintainer mode, replace apr_palloc with a version that
465 initializes the allocated memory with non-zero values, except if
466 AP_DEBUG_NO_ALLOC_POISON is defined. [Stefan Fritsch]
468 *) mod_policy: Add a new testing module to help server administrators
469 enforce a configurable level of protocol compliance on their
470 servers and application servers behind theirs. [Graham Leggett]
472 *) mod_firehose: Add a new debugging module able to record traffic
473 passing through the server in such a way that connections and/or
474 requests be reconstructed and replayed. [Graham Leggett]
484 [Apache 2.5.0-dev includes those bug fixes and changes with the
485 Apache 2.4.xx tree as documented below, except as noted.]
487 Changes with Apache 2.4.x and later:
489 *) http://svn.apache.org/viewvc/httpd/httpd/branches/2.4.x/CHANGES?view=markup
491 Changes with Apache 2.2.x and later:
493 *) http://svn.apache.org/viewvc/httpd/httpd/branches/2.2.x/CHANGES?view=markup
495 Changes with Apache 2.0.x and later:
497 *) http://svn.apache.org/viewvc/httpd/httpd/branches/2.0.x/CHANGES?view=markup