2 Changes with Apache 2.5.0
4 *) SECURITY: CVE-2015-0253 (cve.mitre.org)
5 core: Fix a crash introduced in with ErrorDocument 400 pointing
6 to a local URL-path with the INCLUDES filter active, introduced
7 in 2.4.11. PR 57531. [Yann Ylavic]
9 *) mod_rewrite: Add support for starting External Rewriting Programs
10 as non-root user on UNIX systems by specifying username and group name
11 as third argument of RewriteMap directive. [Jan Kaluza]
13 *) core: If explicitly configured, use the KeepaliveTimeout value of the
14 virtual host which handled the latest request on the connection, or by
15 default the one of the first virtual host bound to the same IP:port.
16 PR56226. [Yann Ylavic]
18 *) mod_authn_core: Add expression support to AuthName and AuthType.
21 *) mod_deflate: A misplaced check prevents limiting small bodies with the
22 new inflate limits. PR56872. [Edward Lu, Eric Covener, Yann Ylavic]
24 *) ab: Add missing longest request (100%) to CSV export.
25 [Marcin Fabrykowski <bugzilla fabrykowski.pl>]
27 *) core: Add expression support to ErrorDocument. Switch from a fixed
28 sized 664 byte array per merge to a hash table. [Graham Leggett]
30 *) mod_ssl: Add the SSL_CLIENT_CERT_RFC4523_CEA variable, which provides
31 a combination of certificate serialNumber and issuer as defined by
32 CertificateExactMatch in RFC4523. [Graham Leggett]
34 *) suexec: Filter out the HTTP_PROXY environment variable because it is
35 treated as alias for http_proxy by some programs. [Stefan Fritsch]
37 *) mod_proxy_http: Use the "Connection: close" header for requests to
38 backends not recycling connections (disablereuse), including the default
39 reverse and forward proxies. [Yann Ylavic]
41 *) mod_proxy_http: Don't expect the backend to ack the "Connection: close" to
42 finally close those not meant to be kept alive by SetEnv proxy-nokeepalive
43 or force-proxy-request-1.0, and respond with 502 instead of 400 if its
44 Connection header is invalid. [Yann Ylavic]
46 *) mod_proxy(es): Avoid error response/document handling by the core if some
47 input filter already did it while reading client's payload. [Yann Ylavic]
49 *) http: Make ap_die() robust against any HTTP error code and not modify
50 response status (finally logged) when nothing is to be done. [Yann Ylavic]
52 *) mod_proxy_connect/wstunnel: If both client and backend sides get readable
53 at the same time, don't lose errors occuring while forwarding on the first
54 side when none occurs next on the other side, and abort. [Yann Ylavic]
56 *) mod_macro: Clear macros before initialization to avoid use-after-free
57 on startup or restart when the module is linked statically. PR 57525
58 [apache.org tech.futurequest.net, Yann Ylavic]
60 *) mod_proxy_http: Don't establish or reuse a backend connection before pre-
61 fetching the request body, so to minimize the delay between it is supposed
62 to be alive and the first bytes sent: this is a best effort to prevent the
63 backend from closing because of idle or keepalive timeout in the meantime.
64 Also, handle a new "proxy-flushall" environment variable which allows to
65 flush any forwarded body data immediately. PR 56541+37920. [Yann Ylavic]
67 *) core: Define and UnDefine are no longer permitted in
68 directory context. Previously they would always be evaulated
69 as the configuration was read without regard for the directory
70 context. [Eric Covener]
72 *) config: For directives that do not expect any arguments, enforce
73 that none are specified in the configuration file.
74 [Joachim Zobel <jzobel heute-morgen.de>, Eric Covener]
76 *) mod_ssl: 'SSLProtocol ALL' was being ignored in virtual host context.
77 PR 57100. [Michael Kaufmann <apache-bugzilla michael-kaufmann.ch>,
80 *) mod_alias: Introduce expression parser support for Alias, ScriptAlias
81 and Redirect. [Graham Leggett]
83 *) mod_rewrite: Improve 'bad flag delimeters' startup error by showing
84 how the input was tokenized. PR 56528. [Edward Lu <Chaosed0 gmail.com>]
86 *) mod_ssl: Add support for extracting subjectAltName entries of type
87 rfc822Name and dNSName into SSL_{CLIENT,SERVER}_SAN_{Email,DNS}_n
88 environment variables. Also addresses PR 57207. [Kaspar Brand]
90 *) mod_proxy: Don't put non balancer-member workers in error state by
91 default for connection or 500/503 errors, and honor status=+I for
92 any error. PR 48388. [Yann Ylavic]
94 *) mod_socache_memcache: Pass expiration time through to memcached. PR 55445.
95 [Faidon Liambotis <paravoid debian.org>, Joe Orton]
97 *) mod_http: Fix incorrect If-Match handling. PR 57358.
98 [Kunihiko Sakamoto <ksakamoto google.com>]
100 *) mod_proxy_ajp: Fix client connection errors handling and logged status
101 when it occurs. PR 56823. [Yann Ylavic]
103 *) ap_expr: Add filemod function for checking file modification dates
106 *) core: Add CGIPassAuth directive to control whether HTTP authorization
107 headers are passed to scripts as CGI variables. PR 56855. [Jeff
110 *) mod_rewrite: Improve relative substitutions in per-directory/htaccess
111 context for directories found by mod_userdir and mod_alias. These no
112 longer require RewriteBase to be specified. [Eric Covener]
114 *) mod_authnz_ldap: Resolve crashes with LDAP authz and non-LDAP authn since
115 r1608202. [Eric Covener]
117 *) mod_buffer: Forward flushed input data immediatly and avoid (unlikely)
118 access to freed memory. [Yann Ylavic, Christophe Jaillet]
120 *) mod_proxy: Use the correct server name for SNI in case the backend
121 SSL connection itself is established via a proxy server.
122 PR 57139 [Szabolcs Gyurko <szabolcs gyurko.org>]
124 *) core: Ensure that httpd exits with an error status when the MPM fails
125 to run. [Yann Ylavic]
127 *) apreq: Content-Length header should be always interpreted as a decimal.
128 Leading 0 could be erroneously considered as an octal value. PR 56598.
129 [Chris Card <ctcard hotmail com>]
131 *) mod_proxy: Now allow for 191 character worker names, with non-fatal
132 errors if name is truncated. PR53218. [Jim Jagielski]
134 *) mod_ssl: Add optional function "ssl_get_tls_cb" to allow support
135 for channel bindings. [Simo Sorce <simo redhat.com>]
137 *) mod_proxy_wstunnel: Concurrent websockets messages could be
138 lost or delayed with ProxyWebsocketAsync enabled.
139 [Edward Lu <Chaosed0 gmail.com>]
141 *) core, mod_info: Add compiled and loaded PCRE versions to version
142 number display. [Rainer Jung]
144 *) mpm_winnt: Accept utf-8 (Unicode) service names and descriptions for
145 internationalization. [William Rowe]
147 *) mpm_winnt: Normalize the error and status messages emitted by service.c,
148 the service control interface for Windows. [William Rowe]
150 *) mod_authnz_ldap: Return LDAP connections to the pool before the handler
151 is run, instead of waiting until the end of the request. [Eric Covener]
153 *) mod_ssl: dump SSL IO/state for the write side of the connection(s),
154 like reads (level TRACE4). [Yann Ylavic]
156 *) mod_proxy: Shutdown (eg. close notify) the backend connection before
157 closing. [Yann Ylavic]
159 *) mpm_event[opt]: Send the SSL close notify alert when the KeepAliveTimeout
160 expires. PR54998. [Yann Ylavic]
162 *) mod_ssl: Ensure that the SSL close notify alert is flushed to the client.
163 PR54998. [Tim Kosse <tim.kosse filezilla-project.org>, Yann Ylavic]
165 *) mod_log_config: Add GlobalLog to allow a globally defined log to
166 be inherited by virtual hosts that define a CustomLog.
167 [Edward Lu <Chaosed0 gmail.com>]
169 *) MPMs: Support SO_REUSEPORT to create multiple duplicated listener
170 records for scalability. [Yingqi Lu <yingqi.lu@intel.com>,
171 Jeff Trawick, Jim Jagielski]
173 *) mod_proxy_html: support automatic detection of doctype and processing
174 of FPIs. PR56285 [Micha Lenk <micha lenk info>, Nick Kew]
176 *) mod_proxy_html: skip documents shorter than 4 bytes
177 PR 56286 [Micha Lenk <micha lenk info>]
179 *) mod_proxy_fdpass: Fix computation of the size of 'struct sockaddr_un'
180 when passed to 'connect()'.
181 [Graham Dumpleton <grahamd apache org>]
183 *) core: Add ap_mpm_resume_suspended() API to allow a suspended connection
185 [Artem <artemciy gmail.com>, Edward Lu <Chaosed0 gmail.com>]
187 *) core: Add ap_mpm_register_socket_callback_timeout() API. [Eric Covener]
189 *) mod_proxy_wstunnel: Honor ProxyWebsocketIdleTimeout in asynchronous
190 processing mode. [Eric Covener]
192 *) mod_authnz_ldap: Fail explicitly when the filter is too long. Remove
193 unnecessary apr_pstrdup() and strlen(). [Graham Leggett]
195 *) Add the ldap-search option to mod_authnz_ldap, allowing authorization
196 to be based on arbitrary expressions that do not include the username.
199 *) Add the ldap function to the expression API, allowing LDAP filters and
200 distinguished names based on expressions to be escaped correctly to
201 guard against LDAP injection. [Graham Leggett]
203 *) Add module mod_ssl_ct, which provides an implementation of Certificate
204 Transparency (RFC 6962) for httpd. [Jeff Trawick]
206 *) mod_proxy: Preserve original request headers even if they differ
207 from the ones to be forwarded to the backend. PR 45387.
210 *) mod_remoteip: Prevent an external proxy from presenting an internal
211 proxy. PR 55962. [Mike Rumph]
213 *) mod_ssl: Add hooks to allow other modules to perform processing at
214 several stages of initialization and connection handling. See
215 mod_ssl_openssl.h. [Jeff Trawick]
217 *) mod_proxy_wstunnel: Avoid sending error responses down an upgraded
218 websockets connection as it is being close down. [Eric Covener]
220 *) mod_proxy_wstunnel: Allow the administrator to cap the amount
221 of time a synchronous websockets connection stays idle with
222 ProxyWebsocketIdleTimeout. [Eric Covener]
224 *) mod_proxy_wstunnel: Change to opt-in for asynchronous support, adding
225 directives ProxyWebsocketAsync and ProxyWebsocketAsyncDelay.
228 *) mod_proxy_wstunnel: Stop leaking websockets backend connections under
229 event MPM (trunk-only). [Eric Covener]
231 *) mod_proxy_http: Add detach_backend hook (potentially usable
232 in other proxy scheme handlers). [Jeff Trawick]
234 *) mod_deflate: Add DeflateAlterETag to control how the ETag
235 is modified. The 'NoChange' parameter mimics 2.2.x behavior.
236 PR 45023, PR 39727. [Eric Covener]
238 *) mod_rewrite: Add 'BNF' (backreferences-no-plus) flag to RewriteRule to
239 allow spaces in backreferences to be encoded as %20 instead of '+'.
242 *) mod_rewrite: Support an optional list of characters to escape in the
243 argument for the 'B' (escape backreferences) flag. [Eric Covener]
245 *) mod_dir: Default to 2.2-like behavior and skip execution when method is
246 neither GET nor POST, such as for DAV requests. PR 54914. [Chris Darroch]
248 *) mod_rewrite: Rename the handler that does per-directory internal
249 redirects to "rewrite-redirect-handler" from "redirect-handler" so
250 it is less ambiguous and less likely to be reused. [Eric Covener]
252 *) mod_rewrite: Protect against looping with the [N] flag by enforcing a
253 default limit of 10000 iterations, and allowing each rule to change its
254 limit. [Eric Covener]
256 *) mod_ssl: Fix config merging of SSLOCSPEnable and SSLOCSPOverrideResponder.
259 *) Add HttpContentLengthHeadZero and HttpExpectStrict directives.
260 [Yehuda Sadeh <yehuda inktank com>, Justin Erenkrantz]
262 *) mod_ssl: Add -t -DDUMP_CA_CERTS option which dumps the filenames of all
263 configured SSL CA certificates to stdout the same way as DUMP_CERTS does.
266 *) mod_ssl: Don't flush when an EOS is received. Prepares mod_ssl
267 to support write completion. [Graham Leggett]
269 *) core: Add parse_errorlog_arg callback to ap_errorlog_provider
270 to allow providers to check the ErrorLog argument. [Jan Kaluza]
272 *) mod_cgid: Use the servers Timeout for each read from a CGI script,
273 allow override with new CGIDRequestTimeout directive. PR43494
274 [Eric Covener, Toshikuni Fukaya <toshikuni-fukaya cybozu co jp>]
276 *) core: ensure any abnormal exit is reported to stderr if it's a tty.
279 *) mod_lua: Let the Inter-VM get/set functions work with a global
280 shared memory pool instead of a per-process pool. [Daniel Gruno]
282 *) ldap: Support ldaps when using the Microsoft LDAP SDK.
283 PR 54626. [Jean-Frederic Clere]
285 *) mod_proxy: Add ap_connection_reusable() for checking if a connection
286 is reusable as of this point in processing. [Jeff Trawick]
288 *) mod_authnz_ldap: Change default value of AuthLDAPMaxSubGroupDepth to 0
289 to avoid performance problems when subgroups aren't in use. [Eric Covener]
291 *) mod_syslog: New module implementing syslog ap_error_log provider.
292 Previously, this code was part of core, now it's in separate module.
295 *) core: Add ap_errorlog_provider to make ErrorLog logging modular. Move
296 syslog support from core to new mod_syslog. [Jan Kaluza]
298 *) mod_status, mod_echo: Fix the display of client addresses.
299 They were truncated to 31 characters which is not enough for IPv6 addresses.
300 PR 54848 [Bernhard Schmidt <berni birkenwald de>]
302 *) core: Add ap_log_data(), ap_log_rdata(), etc. for logging buffers.
305 *) mod_unique_id: Use output of the PRNG rather than IP address and
306 pid, avoiding sleep() call and possible DNS issues at startup,
307 plus improving randomness for IPv6-only hosts.
308 [Jan Kaluza <jkaluza redhat.com>]
310 *) mod_authnz_ldap: Support primitive LDAP servers that do not accept
311 filters, such as "SDBM-backed LDAP" on z/OS, by allowing a special
312 filter "none" to be specified in AuthLDAPURL. [Eric Covener]
314 *) mod_file_cache: mod_file_cache should be able to serve files that
315 haven't had a Content-Type set via e.g. mod_mime. [Eric Covener]
317 *) core: merge AllowEncodedSlashes from the base configuration into
318 virtual hosts. [Eric Covener]
320 *) AIX: Install DSO's with "cp" instead of "install" in instdso.sh
323 *) mod_ldap: Don't keep retrying if a new LDAP connection times out.
326 *) mod_deflate: permit compilation of mod_deflate against a zlib that has
327 been configured with -D Z_PREFIX, which redefines the token "deflate".
330 *) mod_auth_digest: Use the secret when generating nonces in all cases and
331 not only when AuthName is used in .htaccess files (this change may cause
332 problems if used with round robin load balancers). Don't regenerate the
333 secret on graceful restarts. PR 54637 [Stefan Fritsch]
335 *) core: Remove apr_brigade_flatten(), buffering and duplicated code
336 from the HTTP_IN filter, parse chunks in a single pass with zero copy.
337 Reduce memory usage by 48 bytes per request. [Graham Leggett]
339 *) core: Stop the HTTP_IN filter from attempting to write error buckets
340 to the output filters, which is bogus in the proxy case. Create a
341 clean mapping from APR codes to HTTP status codes, and use it where
342 needed. [Graham Leggett]
344 *) mod_proxy: Ensure network errors detected by the proxy are returned as
345 504 Gateway Timout as opposed to 502 Bad Gateway, in order to be
346 compliant with RFC2616 14.9.4 Cache Revalidation and Reload Controls.
348 *) mod_dav: mod_dav overrides dav_fs response on PUT failure. PR 35981
349 [Basant Kumar Kukreja <basant.kukreja sun.com>, Alejandro Alvarez
350 <alejandro.alvarez.ayllon cern.ch>]
352 *) mod_ldap: LDAP connections used for authentication were not respecting
353 LDAPConnectionPoolTimeout. PR 54587
355 *) core: ap_rgetline_core now pulls from r->proto_input_filters.
357 *) mod_proxy_html: process parsed comments immediately.
358 Fixes bug where parsed comments may be lost. [Nick Kew]
360 *) mod_proxy_html: introduce doctype for HTML 5 [Nick Kew]
362 *) mod_proxy_html: fix typo-bug processing "strict" vs "transitional"
363 HTML/XHTML [Nick Kew]
365 *) core: Add option to add valgrind support. Use it to reduce false positive
366 warnings in mod_ssl. [Stefan Fritsch]
368 *) mod_authn_file, mod_authn_dbd, mod_authn_dbm, mod_authn_socache:
369 Cache the result of the most recent password hash verification for every
370 keep-alive connection. This saves some expensive calculations.
373 *) http: Remove support for Request-Range header sent by Navigator 2-3 and
374 MSIE 3. [Stefan Fritsch]
376 *) core, http: Extend HttpProtocol with an option to enforce stricter HTTP
377 conformance or to only log the found problems. [Stefan Fritsch]
379 *) core: Correctly parse an IPv6 literal host specification in an absolute
380 URL in the request line. [Stefan Fritsch]
384 *) core: Add LogLevelOverride directive that allows to override the
385 loglevel for clients from certain IPs. This also works for things
386 like the SSL handshake where <If> LogLevel ... </If> is evaluated
387 too late. [Stefan Fritsch]
389 *) core: Add new directive Warning to issue warnings from a configuration
390 file. Both Warning and Error now generate a timestamped log message.
393 *) ap_expr: Add SERVER_PROTOCOL_VERSION, ..._MAJOR, and ..._MINOR
394 variables. [Stefan Fritsch]
396 *) core: New directive RegisterHttpMethod for registering non-standard
397 HTTP methods. [Stefan Fritsch]
399 *) core: New directive HttpProtocol which allows to disable HTTP/0.9
400 support. [Stefan Fritsch]
402 *) mod_allowhandlers: New module to forbid specific handlers for specific
403 directories. [Stefan Fritsch]
405 *) mod_systemd: New module, for integration with systemd on Linux.
406 [Jan Kaluza <jkaluza redhat.com>]
408 *) WinNT MPM: Store pid and generation for each thread in scoreboard
409 to allow tracking of threads from exiting children via mod_status
410 or other such mechanisms. [Jeff Trawick]
412 *) The following now respect DefaultRuntimeDir/DEFAULT_REL_RUNTIMEDIR:
413 - APIs: ap_log_pid(), ap_remove_pid, ap_read_pid()
414 - core: the scoreboard (ScoreBoardFile), pid file (PidFile), and
416 - mod_cache: thundering herd lock directory
417 - mod_lbmethod_heartbeat, mod_heartmonitor: heartbeat storage file
418 - mod_ldap: shared memory cache
419 - mod_socache_shmcb, mod_socache_dbm: shared memory or dbm for cache
422 *) suexec: Add --enable-suexec-capabilites support on Linux, to use
423 setuid/setgid capability bits rather than a setuid root binary.
426 *) suexec: Add support for logging to syslog as an alternative to logging
427 to a file; configure --without-suexec-logfile --with-suexec-syslog.
430 *) mod_ssl: Add support for TLS Next Protocol Negotiation. PR 52210.
431 [Matthew Steele <mdsteele google.com>]
433 *) cross-compile: allow to provide CC_FOR_BUILD so that gen_test_char will
434 be compiled by the build compiler instead of the host compiler.
435 Also set CC_FOR_BUILD to 'cc' when cross-compilation is detected.
436 PR 51257. [Guenter Knauf]
438 *) core: In maintainer mode, replace apr_palloc with a version that
439 initializes the allocated memory with non-zero values, except if
440 AP_DEBUG_NO_ALLOC_POISON is defined. [Stefan Fritsch]
442 *) mod_policy: Add a new testing module to help server administrators
443 enforce a configurable level of protocol compliance on their
444 servers and application servers behind theirs. [Graham Leggett]
446 *) mod_firehose: Add a new debugging module able to record traffic
447 passing through the server in such a way that connections and/or
448 requests be reconstructed and replayed. [Graham Leggett]
458 [Apache 2.5.0-dev includes those bug fixes and changes with the
459 Apache 2.4.xx tree as documented below, except as noted.]
461 Changes with Apache 2.4.x and later:
463 *) http://svn.apache.org/viewvc/httpd/httpd/branches/2.4.x/CHANGES?view=markup
465 Changes with Apache 2.2.x and later:
467 *) http://svn.apache.org/viewvc/httpd/httpd/branches/2.2.x/CHANGES?view=markup
469 Changes with Apache 2.0.x and later:
471 *) http://svn.apache.org/viewvc/httpd/httpd/branches/2.0.x/CHANGES?view=markup