This release fixes security problems affecting the Windows platform described in CAN-2003-0016 and CAN-2003-0017. It also contains bug fixes and some new features. For details see the Official Announcement and the CHANGES_2.0 list.

Apache 2.0 add-in modules are not compatible with Apache 1.3 modules. If you are running third party add-in modules, you will need to obtain new modules written for Apache 2.0 from that third party before you attempt to upgrade from Apache 1.3.

Due to a small problem in this release, users of Windows 95, 98, and ME must also download a small patch file below and extract it from the root of their Apache installation to replace the bin/libapr.dll file.

• Unix Source: httpd-2.0.44.tar.gz [PGP] [MD5]
• Unix Source: httpd-2.0.44.tar.Z [PGP] [MD5]
• Win32 Source: httpd-2.0.44-win32-src.zip [PGP] [MD5]
• Win32 Binary (MSI Installer): apache_2.0.44-win32-x86-no_ssl.msi [PGP] [MD5]
• Win95/98/ME Patch: apache_2.0.44-win9x-x86-apr-patch.zip [PGP] [MD5]
• Other Binaries

• mod_autoindex: Bring forward the IndexOptions IgnoreCase option from Apache 1.3. PR 14276 [David Shane Holden , William Rowe]
  
  
• mod_mime: Workaround to prevent a segfault if r->filename=NULL [Brian Pane]
  
  
• Reorder the definitions for mod_ldap and mod_auth_ldap within config.m4 to make sure the parent mod_ldap is defined first. This ensures that mod_ldap comes before mod_auth_ldap in the httpd.conf file, which is necessary for mod_auth_ldap to load. PR 14256 [Graham Leggett]
  
  
• Fix the building of cgi command lines when the query string contains '='. PR 13914 [Ville Skyttä , Jeff Trawick]
  
  
• Rename CacheMaxStreamingBuffer to MCacheMaxStreamingBuffer. Move implementation of MCacheMaxStreamingBuffer from mod_cache to mod_mem_cache. MCacheMaxStreamingBuffer now defaults to the lesser of 100,000 bytes or MCacheMaxCacheObjectSize. This should eliminate the need for explicitly coding MCacheMaxStreamingBuffer in most configurations. [Bill Stoddard]
  
  
• Replace APU_HAS_LDAPSSL_CLIENT_INIT with APU_HAS_LDAP_NETSCAPE_SSL as set by apr-util in util_ldap.c. This should allow mod_ldap to work with the Netscape/Mozilla LDAP library. [Øyvin Sømme , Graham Leggett]
  
  
• Fix critical bug in new --enable-v4-mapped configure option implementation which broke IPv4 listening sockets on some systems. [hiroyuki hanai ]
  
  
• mod_setenvif: Fix BrowserMatchNoCase support for non-regex patterns [André Malo ]
  
  
• Add version string to provider API. [Justin Erenkrantz]
  
  
• mod_negotiation: Set the appropriate mime response headers (Content-Type, charset, Content-Language and Content-Encoding) for negotated type-map "Body:" responses (such as the error pages.) [André Malo ]
  
  
• mod_log_config: Allow '%%' escaping in CustomLog format strings to insert a literal, single '%'. [André Malo ]
  
  
• mod_autoindex: AddDescription directives for directories now work as in Apache 1.3, where no trailing '/' is specified on the directory name. Previously, the trailing '/' *had* to be specified, which was incompatible with Apache 1.3. PR 7990 [Jeff Trawick]
  
  
• Fix for PR 14556. The expiry calculations in mod_cache were trying to perform "now + ((date - lastmod) * factor)" where date == lastmod resulting in "now + 0". The code now follows the else path (using the default expiration) if date is equal to lastmod. [rx@armstrike.com (Sergey), Paul J. Reder]
  
  
• Use AP_DECLARE in the debug versions of ap_strXXX in case the default calling convention is not the same as the one used by AP_DECLARE. [Juan Rivera ]
  
  
• mod_cache: Don't cache response header fields designated as hop-by-hop headers in HTTP/1.1 (RFC 2616 Section 13.5.1). [Estrade Matthieu , Brian Pane]
  
  
• mod_cgid: Handle environment variables containing newlines. PR 14550 [Piotr Czejkowski , Jeff Trawick]
  
  
• Move mod_ext_filter out of experimental and into filters. [Jeff Trawick]
  
  
• Fixed a memory leak in mod_deflate with dynamic content. PR 14321 [Ken Franken ]
  
  
• Add --[enable|disable]-v4-mapped configure option to control whether or not Apache expects to handle IPv4 connections on IPv6 listening sockets. Either setting will work on systems with the IPV6_V6ONLY socket option. --enable-v4-mapped must be used on systems that always allow IPv4 connections on IPv6 listening sockets. PR 14037 (Bugzilla), PR 7492 (Gnats) [Jeff Trawick]
  
  
• This fixes a problem where the underlying cache code indicated that there was one more element on the cache than there actually was. This happened since element 0 exists but is not used. This code allocates the correct number of useable elements and reports the number of actually used elements. The previous code only allowed MCacheMaxObjectCount-1 objects to be stored in the cache. [Paul J. Reder]
  
  
• mod_setenvif: Add SERVER_ADDR special keyword to allow envariable setting according to the server IP address which received the request. [Ken Coar]
  
  
• mod_cgid: Terminate CGI scripts when the client connection drops. PR 8388 [Jeff Trawick]
  
  
• Rearrange OpenSSL engine initialization to support RAND redirection on crypto accelerator. [Frederic DONNAT ]
  
  
• Always emit Vary header if mod_deflate is involved in the request. [Andre Malo ]
  
  
• mod_isapi: Stop unsetting the 'empty' query string result with a NULL argument in ecb->lpszQueryString, eliminating segfaults for some ISAPI modules. PR 14399 [Detlev Vendt ]
  
  
• mod_isapi: Fix an issue where the HSE_REQ_DONE_WITH_SESSION notification is received before the HttpExtensionProc() returns HSE_STATUS_PENDING. This only affected isapi .dll's configured with the ISAPIFakeAsync on directive. PR 11918 [John DeSetto , William Rowe]
  
  
• mod_isapi: Fix the issue where all results from mod_isapi would run through the core die handler resulting in invalid responses or access log entries. PR 10216 [William Rowe]
  
  
• Improves the user friendliness of the CacheRoot processing over my last pass. This version avoids the pool allocations but doesn't avoid all of the runtime checks. It no longer terminates during post-config processing. An error is logged once per worker, indicating that the CacheRoot needs to be set. [Paul J. Reder]
  
  
• Fix a bug where we keep files open until the end of a keepalive connection, which can result in: (24)Too many open files: file permissions deny server access especially on threaded servers. [Greg Ames, Jeff Trawick]
  
  
• Fix a bug in which mod_proxy sent an invalid Content-Length when a proxied URL was invoked as a server-side include within a page generated in response to a form POST. [Brian Pane]
  
  
• Added code to process min and max file size directives and to init the expirychk flag in mod_disk_cache. Added a clarifying comment to cache_util. [Paul J. Reder]
  
  
• The value emitted by ServerSignature now mimics the Server HTTP header as controlled by ServerTokens. [Francis Daly ]
  
  
• Gracefully handly retry situations in the SSL input filter, by following the SSL libraries' retry semantics. [William Rowe]
  
  
• Terminate CGI scripts when the client connection drops. This fix only applies to some normal paths in mod_cgi. mod_cgid is still busted. PR 8388 [Jeff Trawick]
  
  
• Fix a bug where 416 "Range not satisfiable" was being returned for content that should have been redirected. [Greg Ames]
  
  
• Fix memory leak in mod_ssl from internal SSL library allocations within SSL_get_peer_certificate and X509_get_pubkey. [Zvi Har'El Madhusudan Mathihalli ].
  
  
• mod_ssl uses free() inappropriately in several places, to free memory which has been previously allocated inside OpenSSL. Such memory should be freed with OPENSSL_free(), not with free(). [Nadav Har'El , Madhusudan Mathihalli ].
  
  
• Emit a message to the error log when we return 404 because the URI contained '%2f'. (This was previously nastily silent and difficult to debug.) [Ken Coar]
  
  
• Fix streaming output from an nph- CGI script. CGI:IRC now works. PR 8482 [Jeff Trawick]
  
  
• More accurate logging of bytes sent in mod_logio when the client terminates the connection before the response is completely sent [Bojan Smojver ]
  
  
• Fix some problems in the perchild MPM. [Jonas Eriksson ]
  
  
• Change the CacheRoot processing to check for a required value at config time. This saves a lot of wasted processing if the mod_disk_cache module is loaded but no CacheRoot was provided. This fix also adds code to log an error and avoid useless pallocs and procesing when the computed cache file name cannot be opened. This also updates the docs accordingly. [Paul J. Reder]
  
  
• Introduce the EnableSendfile directive, allowing users of NFS shares to disable sendfile mechanics when they either fail outright or provide intermitantly corrupted data. PR [William Rowe]
  
  
• Resolve the error "An operation was attempted on something that is not a socket. : winnt_accept: AcceptEx failed. Attempting to recover." for users of various firewall and anti-virus software on Windows. PR 8325 [William Rowe]
  
  
• Add the ProxyBadHeader directive, which gives the admin some control on how mod_proxy should handle bogus HTTP headers from proxied servers. This allows 2.0 to "emulate" 1.3's behavior if desired. [Jim Jagielski]
  
  
• Change the LDAP modules to export their symbols correctly during a Windows build. Add dsp files for Windows. Update README.ldap file for Windows build instructions. [Andre Schild ]
  
  
• Performance improvements for the code that generates HTTP response headers [Brian Pane]
  
  
• Add -S as a synonym for -t -DDUMP_VHOSTS. [Thom May ]
  
  
• Fix a bug with dbm rewrite maps which caused the wrong value to be used when the key was not found in the dbm. PR 13204 [Jeff Trawick]
  
  
• Fix a problem with streaming script output and mod_cgid. [Jeff Trawick]
  
  
• Add ap_register_provider/ap_lookup_provider API. [John K. Sterling , Justin Erenkrantz]