2 Changes with Apache 2.5.0
4 *) mod_http2: CVE-2016-8740: Mitigate DoS memory exhaustion via endless
6 [Naveen Tiwari <naveen.tiwari@asu.edu> and CDF/SEFCOM at Arizona State University, Stefan Eissing]
8 *) mod_lua: Fix default value of LuaInherit directive. It should be
9 'parent-first' instead of 'none', as per documentation. PR 60419
12 *) mod_ratelimit: Allow for initial "burst" amount at full speed before
13 throttling: PR 60145 [Andy Valencia <ajv-etradanalhos vsta.org>,
16 *) event: Allow to use the whole allocated scoreboard (up to ServerLimit
17 slots) to avoid scoreboard full errors when some processes are finishing
18 gracefully. Also, make gracefully finishing processes close all
19 keep-alive connections. PR 53555. [Stefan Fritsch]
21 *) http: Allow unknown response status' lines returned in the form of
22 "HTTP/x.x xxx Status xxx". [Yann Ylavic]
24 *) core: Add <IfFile> configuration section to allow any file on disk to be
25 used as a conditional. [Edward Lu, Eric Covener]
27 *) event: Avoid listener periodic wake ups by using the pollset wake-ability
28 when available. PR 57399. [Yann Ylavic, Luca Toscano]
30 *) mod_brotli: Add a new module for dynamic Brotli (RFC 7932) compression.
33 *) core: Permit unencoded ';' characters to appear in proxy requests and
34 Location: response headers. Corresponds to modern browser behavior.
37 *) mod_cache: Use the actual URI path and query-string for identifying the
38 cached entity (key), such that rewrites are taken into account when
39 running afterwards (CacheQuickHandler off). PR 21935. [Yann Ylavic]
41 *) mod_ssl: Fix quick renegotiation (OptRenegotiaton) with no intermediate
42 in the client certificate chain. PR 55786. [Yann Ylavic]
44 *) mod_reqtimeout: Fix body timeout disabling for CONNECT requests to avoid
45 triggering mod_proxy_connect's AH01018 once the tunnel is established.
48 *) mod_crypto: Add the all purpose crypto filters with support for HLS.
51 *) core: Drop an invalid Last-Modified header value coming
52 from a FCGI/CGI script instead of replacing it with Unix epoch.
53 Warn the users about Last-Modified header value replacements
54 and violations of the RFC.
55 [Yann Ylavic, Luca Toscano, William Rowe, Jacob Champion]
57 *) mod_dav: Allow other modules to become providers and add ACLs
59 [Jari Urpalainen <jari.urpalainen nokia.com>, Graham Leggett]
61 *) mod_dav: Add dav_begin_multistatus, dav_send_one_response,
62 dav_finish_multistatus, dav_send_multistatus, dav_handle_err,
63 dav_failed_proppatch, dav_success_proppatch to mod_dav.h.
64 [Jari Urpalainen <jari.urpalainen nokia.com>, Graham Leggett]
66 *) mod_proxy, mod_ssl: Handle SSLProxy* directives in <Proxy> sections,
67 allowing per backend TLS configuration. [Yann Ylavic]
69 *) core: explicitly exclude 'h2' from protocols announced via an Upgrade:
70 header as commanded by http-wg. [Stefan Eissing]
72 *) mod_proxy_ajp: Add "secret" parameter to proxy workers to implement legacy
73 AJP13 authentication. PR 53098. [Dmitry A. Bakshaev <dab1818 gmail com>]
75 *) mpm_event: Don't take over scoreboard slots from gracefully finishing
76 threads. [Stefan Fritsch]
78 *) mod_status: Display the process slot number in the async connection
79 overview. [Stefan Fritsch]
81 *) mpm: Generalise the ap_mpm_register_socket functions to accept pipes
82 or sockets. [Graham Leggett]
84 *) core: Extend support for setting aside data from the network input filter
85 to any connection or request input filter. [Graham Leggett]
87 *) core: Split ap_create_request() from ap_read_request(). [Graham Leggett]
89 *) mod_auth_digest: Fix compatibility with expression-based Authname. PR59039.
92 *) mpm: Add a complete_connection hook that confirms whether an MPM is allowed
93 to leave the WRITE_COMPLETION phase. Move filter code out of the MPMs.
96 *) core: Added support for HTTP code 451. PR58985.
97 [Yehuda Katz <yehuda ymkatz.net>, Jim Jagielski]
99 *) mod_ssl: Add support for OpenSSL 1.1.0. [Rainer Jung]
101 *) mod_filter: Fix AddOutputFilterByType with non-content-level filters.
102 PR58856 [Micha Lenk <micha lenk.info>]
104 *) mod_cache: Consider Cache-Control: s-maxage in expiration
105 calculations. [Eric Covener]
107 *) mod_cache: Allow caching of responses with an Expires header
108 in the past that also has Cache-Control: max-age or s-maxage.
109 PR55156. [Eric Covener]
111 *) Added many log numbers to log statements that had none.
113 *) mod_session: Introduce SessionExpiryUpdateInterval which allows to
114 configure the session/cookie expiry's update interval. PR 57300.
115 [Paul Spangler <paul.spangler ni.com>]
117 *) core: Extend support for asynchronous write completion from the
118 network filter to any connection or request filter. [Graham Leggett]
120 *) mpm_event: Free memory earlier when shutting down processes.
123 *) mod_auth_digest: remove AuthDigestEnableQueryStringHack which is no
124 more documented since dec 2012 (r1415960). [Christophe Jaillet]
126 *) mod_charset_lite: On EBCDIC platforms, make sure mod_charset_lite runs
127 after other resource-level filters. [Eric Covener]
129 *) mod_dir: Responses that go through "FallbackResource" might appear to
130 hang due to unterminated chunked encoding. PR58292. [Eric Covener]
132 *) http: Don't remove the Content-Length of zero from a HEAD response if
133 it comes from an origin server, module or script. [Yann Ylavic]
135 *) http: Add support for RFC2324/RFC7168. [Graham Leggett]
137 *) mod_rewrite: Add support for starting External Rewriting Programs
138 as non-root user on UNIX systems by specifying username and group name
139 as third argument of RewriteMap directive. [Jan Kaluza]
141 *) mod_authn_core: Add expression support to AuthName and AuthType.
144 *) suexec: Filter out the HTTP_PROXY environment variable because it is
145 treated as alias for http_proxy by some programs. [Stefan Fritsch]
147 *) mod_proxy_http: Don't establish or reuse a backend connection before pre-
148 fetching the request body, so to minimize the delay between it is supposed
149 to be alive and the first bytes sent: this is a best effort to prevent the
150 backend from closing because of idle or keepalive timeout in the meantime.
151 Also, handle a new "proxy-flushall" environment variable which allows to
152 flush any forwarded body data immediately. PR 56541+37920. [Yann Ylavic]
154 *) core: Define and UnDefine are no longer permitted in
155 directory context. Previously they would always be evaulated
156 as the configuration was read without regard for the directory
157 context. [Eric Covener]
159 *) config: For directives that do not expect any arguments, enforce
160 that none are specified in the configuration file.
161 [Joachim Zobel <jzobel heute-morgen.de>, Eric Covener]
163 *) mod_rewrite: Improve 'bad flag delimeters' startup error by showing
164 how the input was tokenized. PR 56528. [Edward Lu <Chaosed0 gmail.com>]
166 *) mod_proxy: Don't put non balancer-member workers in error state by
167 default for connection or 500/503 errors, and honor status=+I for
168 any error. PR 48388. [Yann Ylavic]
170 *) mod_socache_memcache: Pass expiration time through to memcached. PR 55445.
171 [Faidon Liambotis <paravoid debian.org>, Joe Orton]
173 *) ap_expr: Add filemod function for checking file modification dates
176 *) mod_authnz_ldap: Resolve crashes with LDAP authz and non-LDAP authn since
177 r1608202. [Eric Covener]
179 *) apreq: Content-Length header should be always interpreted as a decimal.
180 Leading 0 could be erroneously considered as an octal value. PR 56598.
181 [Chris Card <ctcard hotmail com>]
183 *) mod_proxy: Now allow for 191 character worker names, with non-fatal
184 errors if name is truncated. PR53218. [Jim Jagielski]
186 *) mod_ssl: Add optional function "ssl_get_tls_cb" to allow support
187 for channel bindings. [Simo Sorce <simo redhat.com>]
189 *) mod_proxy_wstunnel: Concurrent websockets messages could be
190 lost or delayed with ProxyWebsocketAsync enabled.
191 [Edward Lu <Chaosed0 gmail.com>]
193 *) core, mod_info: Add compiled and loaded PCRE versions to version
194 number display. [Rainer Jung]
196 *) mod_authnz_ldap: Return LDAP connections to the pool before the handler
197 is run, instead of waiting until the end of the request. [Eric Covener]
199 *) mod_proxy_html: support automatic detection of doctype and processing
200 of FPIs. PR56285 [Micha Lenk <micha lenk info>, Nick Kew]
202 *) mod_proxy_html: skip documents shorter than 4 bytes
203 PR 56286 [Micha Lenk <micha lenk info>]
205 *) mod_proxy_fdpass: Fix computation of the size of 'struct sockaddr_un'
206 when passed to 'connect()'.
207 [Graham Dumpleton <grahamd apache org>]
209 *) core: Add ap_mpm_resume_suspended() API to allow a suspended connection
211 [Artem <artemciy gmail.com>, Edward Lu <Chaosed0 gmail.com>]
213 *) core: Add ap_mpm_register_socket_callback_timeout() API. [Eric Covener]
215 *) mod_proxy_wstunnel: Honor ProxyWebsocketIdleTimeout in asynchronous
216 processing mode. [Eric Covener]
218 *) mod_authnz_ldap: Fail explicitly when the filter is too long. Remove
219 unnecessary apr_pstrdup() and strlen(). [Graham Leggett]
221 *) Add the ldap-search option to mod_authnz_ldap, allowing authorization
222 to be based on arbitrary expressions that do not include the username.
225 *) Add the ldap function to the expression API, allowing LDAP filters and
226 distinguished names based on expressions to be escaped correctly to
227 guard against LDAP injection. [Graham Leggett]
229 *) Add module mod_ssl_ct, which provides an implementation of Certificate
230 Transparency (RFC 6962) for httpd. [Jeff Trawick]
232 *) mod_proxy_wstunnel: Avoid sending error responses down an upgraded
233 websockets connection as it is being close down. [Eric Covener]
235 *) mod_proxy_wstunnel: Allow the administrator to cap the amount
236 of time a synchronous websockets connection stays idle with
237 ProxyWebsocketIdleTimeout. [Eric Covener]
239 *) mod_proxy_wstunnel: Change to opt-in for asynchronous support, adding
240 directives ProxyWebsocketAsync and ProxyWebsocketAsyncDelay.
243 *) mod_proxy_wstunnel: Stop leaking websockets backend connections under
244 event MPM (trunk-only). [Eric Covener]
246 *) mod_proxy_http: Add detach_backend hook (potentially usable
247 in other proxy scheme handlers). [Jeff Trawick]
249 *) mod_deflate: Add DeflateAlterETag to control how the ETag
250 is modified. The 'NoChange' parameter mimics 2.2.x behavior.
251 PR 45023, PR 39727. [Eric Covener]
253 *) mod_rewrite: Add 'BNF' (backreferences-no-plus) flag to RewriteRule to
254 allow spaces in backreferences to be encoded as %20 instead of '+'.
257 *) mod_rewrite: Support an optional list of characters to escape in the
258 argument for the 'B' (escape backreferences) flag. [Eric Covener]
260 *) mod_dir: Default to 2.2-like behavior and skip execution when method is
261 neither GET nor POST, such as for DAV requests. PR 54914. [Chris Darroch]
263 *) mod_rewrite: Rename the handler that does per-directory internal
264 redirects to "rewrite-redirect-handler" from "redirect-handler" so
265 it is less ambiguous and less likely to be reused. [Eric Covener]
267 *) mod_rewrite: Protect against looping with the [N] flag by enforcing a
268 default limit of 10000 iterations, and allowing each rule to change its
269 limit. [Eric Covener]
271 *) mod_ssl: Fix config merging of SSLOCSPEnable and SSLOCSPOverrideResponder.
274 *) Add HttpContentLengthHeadZero and HttpExpectStrict directives.
275 [Yehuda Sadeh <yehuda inktank com>, Justin Erenkrantz]
277 *) mod_ssl: Add -t -DDUMP_CA_CERTS option which dumps the filenames of all
278 configured SSL CA certificates to stdout the same way as DUMP_CERTS does.
281 *) mod_ssl: Don't flush when an EOS is received. Prepares mod_ssl
282 to support write completion. [Graham Leggett]
284 *) core: Add parse_errorlog_arg callback to ap_errorlog_provider
285 to allow providers to check the ErrorLog argument. [Jan Kaluza]
287 *) mod_cgid: Use the servers Timeout for each read from a CGI script,
288 allow override with new CGIDRequestTimeout directive. PR43494
289 [Eric Covener, Toshikuni Fukaya <toshikuni-fukaya cybozu co jp>]
291 *) core: ensure any abnormal exit is reported to stderr if it's a tty.
294 *) mod_lua: Let the Inter-VM get/set functions work with a global
295 shared memory pool instead of a per-process pool. [Daniel Gruno]
297 *) ldap: Support ldaps when using the Microsoft LDAP SDK.
298 PR 54626. [Jean-Frederic Clere]
300 *) mod_authnz_ldap: Change default value of AuthLDAPMaxSubGroupDepth to 0
301 to avoid performance problems when subgroups aren't in use. [Eric Covener]
303 *) mod_syslog: New module implementing syslog ap_error_log provider.
304 Previously, this code was part of core, now it's in separate module.
307 *) core: Add ap_errorlog_provider to make ErrorLog logging modular. Move
308 syslog support from core to new mod_syslog. [Jan Kaluza]
310 *) mod_status, mod_echo: Fix the display of client addresses.
311 They were truncated to 31 characters which is not enough for IPv6 addresses.
312 PR 54848 [Bernhard Schmidt <berni birkenwald de>]
314 *) mod_unique_id: Use output of the PRNG rather than IP address and
315 pid, avoiding sleep() call and possible DNS issues at startup,
316 plus improving randomness for IPv6-only hosts.
317 [Jan Kaluza <jkaluza redhat.com>]
319 *) mod_file_cache: mod_file_cache should be able to serve files that
320 haven't had a Content-Type set via e.g. mod_mime. [Eric Covener]
322 *) core: merge AllowEncodedSlashes from the base configuration into
323 virtual hosts. [Eric Covener]
325 *) AIX: Install DSO's with "cp" instead of "install" in instdso.sh
328 *) mod_ldap: Don't keep retrying if a new LDAP connection times out.
331 *) mod_deflate: permit compilation of mod_deflate against a zlib that has
332 been configured with -D Z_PREFIX, which redefines the token "deflate".
335 *) mod_auth_digest: Use the secret when generating nonces in all cases and
336 not only when AuthName is used in .htaccess files (this change may cause
337 problems if used with round robin load balancers). Don't regenerate the
338 secret on graceful restarts. PR 54637 [Stefan Fritsch]
340 *) core: Remove apr_brigade_flatten(), buffering and duplicated code
341 from the HTTP_IN filter, parse chunks in a single pass with zero copy.
342 Reduce memory usage by 48 bytes per request. [Graham Leggett]
344 *) core: Stop the HTTP_IN filter from attempting to write error buckets
345 to the output filters, which is bogus in the proxy case. Create a
346 clean mapping from APR codes to HTTP status codes, and use it where
347 needed. [Graham Leggett]
349 *) mod_proxy: Ensure network errors detected by the proxy are returned as
350 504 Gateway Timout as opposed to 502 Bad Gateway, in order to be
351 compliant with RFC2616 14.9.4 Cache Revalidation and Reload Controls.
353 *) mod_dav: mod_dav overrides dav_fs response on PUT failure. PR 35981
354 [Basant Kumar Kukreja <basant.kukreja sun.com>, Alejandro Alvarez
355 <alejandro.alvarez.ayllon cern.ch>]
357 *) mod_ldap: LDAP connections used for authentication were not respecting
358 LDAPConnectionPoolTimeout. PR 54587
360 *) core: ap_rgetline_core now pulls from r->proto_input_filters.
362 *) mod_proxy_html: process parsed comments immediately.
363 Fixes bug where parsed comments may be lost. [Nick Kew]
365 *) mod_proxy_html: introduce doctype for HTML 5 [Nick Kew]
367 *) mod_proxy_html: fix typo-bug processing "strict" vs "transitional"
368 HTML/XHTML [Nick Kew]
370 *) core: Add option to add valgrind support. Use it to reduce false positive
371 warnings in mod_ssl. [Stefan Fritsch]
373 *) mod_authn_file, mod_authn_dbd, mod_authn_dbm, mod_authn_socache:
374 Cache the result of the most recent password hash verification for every
375 keep-alive connection. This saves some expensive calculations.
378 *) http: Remove support for Request-Range header sent by Navigator 2-3 and
379 MSIE 3. [Stefan Fritsch]
381 *) core, http: Extend HttpProtocol with an option to enforce stricter HTTP
382 conformance or to only log the found problems. [Stefan Fritsch]
384 *) core: Correctly parse an IPv6 literal host specification in an absolute
385 URL in the request line. [Stefan Fritsch]
389 *) core: Add LogLevelOverride directive that allows to override the
390 loglevel for clients from certain IPs. This also works for things
391 like the SSL handshake where <If> LogLevel ... </If> is evaluated
392 too late. [Stefan Fritsch]
394 *) core: Add new directive Warning to issue warnings from a configuration
395 file. Both Warning and Error now generate a timestamped log message.
398 *) ap_expr: Add SERVER_PROTOCOL_VERSION, ..._MAJOR, and ..._MINOR
399 variables. [Stefan Fritsch]
401 *) core: New directive RegisterHttpMethod for registering non-standard
402 HTTP methods. [Stefan Fritsch]
404 *) core: New directive HttpProtocol which allows to disable HTTP/0.9
405 support. [Stefan Fritsch]
407 *) mod_allowhandlers: New module to forbid specific handlers for specific
408 directories. [Stefan Fritsch]
410 *) mod_systemd: New module, for integration with systemd on Linux.
411 [Jan Kaluza <jkaluza redhat.com>]
413 *) WinNT MPM: Store pid and generation for each thread in scoreboard
414 to allow tracking of threads from exiting children via mod_status
415 or other such mechanisms. [Jeff Trawick]
417 *) The following now respect DefaultRuntimeDir/DEFAULT_REL_RUNTIMEDIR:
418 - APIs: ap_log_pid(), ap_remove_pid, ap_read_pid()
419 - mod_cache: thundering herd lock directory
420 - mod_lbmethod_heartbeat, mod_heartmonitor: heartbeat storage file
421 - mod_ldap: shared memory cache
422 - mod_socache_shmcb, mod_socache_dbm: shared memory or dbm for cache
425 *) suexec: Add --enable-suexec-capabilites support on Linux, to use
426 setuid/setgid capability bits rather than a setuid root binary.
429 *) suexec: Add support for logging to syslog as an alternative to logging
430 to a file; configure --without-suexec-logfile --with-suexec-syslog.
433 *) mod_ssl: Add support for TLS Next Protocol Negotiation. PR 52210.
434 [Matthew Steele <mdsteele google.com>]
436 *) cross-compile: allow to provide CC_FOR_BUILD so that gen_test_char will
437 be compiled by the build compiler instead of the host compiler.
438 Also set CC_FOR_BUILD to 'cc' when cross-compilation is detected.
439 PR 51257. [Guenter Knauf]
441 *) core: In maintainer mode, replace apr_palloc with a version that
442 initializes the allocated memory with non-zero values, except if
443 AP_DEBUG_NO_ALLOC_POISON is defined. [Stefan Fritsch]
445 *) mod_policy: Add a new testing module to help server administrators
446 enforce a configurable level of protocol compliance on their
447 servers and application servers behind theirs. [Graham Leggett]
449 *) mod_firehose: Add a new debugging module able to record traffic
450 passing through the server in such a way that connections and/or
451 requests be reconstructed and replayed. [Graham Leggett]
461 [Apache 2.5.0-dev includes those bug fixes and changes with the
462 Apache 2.4.xx tree as documented below, except as noted.]
464 Changes with Apache 2.4.x and later:
466 *) http://svn.apache.org/viewvc/httpd/httpd/branches/2.4.x/CHANGES?view=markup
468 Changes with Apache 2.2.x and later:
470 *) http://svn.apache.org/viewvc/httpd/httpd/branches/2.2.x/CHANGES?view=markup
472 Changes with Apache 2.0.x and later:
474 *) http://svn.apache.org/viewvc/httpd/httpd/branches/2.0.x/CHANGES?view=markup