Die Apache Software Foundation hat die neue Version 2.4.55 des beliebten HTTP Webserver Apache2 veröffentlicht. Das Release schließt Sicherheitslücken im mod_proxy und mod_dav Modulen, führt Verbesserungen durch und behebt Fehler.
Apache2 2.4.55 Release Notes
*) SECURITY: CVE-2022-37436: Apache HTTP Server: mod_proxy prior to 2.4.55 allows a backend to trigger HTTP response splitting (cve.mitre.org) Prior to Apache HTTP Server 2.4.55, a malicious backend can cause the response headers to be truncated early, resulting in some headers being incorporated into the response body. If the later headers have any security purpose, they will not be interpreted by the client. Credits: Dimas Fariski Setyawan Putra (@nyxsorcerer) *) SECURITY: CVE-2022-36760: Apache HTTP Server: mod_proxy_ajp Possible request smuggling (cve.mitre.org) Inconsistent Interpretation of HTTP Requests ('HTTP Request Smuggling') vulnerability in mod_proxy_ajp of Apache HTTP Server allows an attacker to smuggle requests to the AJP server it forwards requests to. This issue affects Apache HTTP Server Apache HTTP Server 2.4 version 2.4.54 and prior versions. Credits: ZeddYu_Lu from Qi'anxin Research Institute of Legendsec at Qi'anxin Group *) SECURITY: CVE-2006-20001: mod_dav out of bounds read, or write of zero byte (cve.mitre.org) A carefully crafted If: request header can cause a memory read, or write of a single zero byte, in a pool (heap) memory location beyond the header value sent. This could cause the process to crash. This issue affects Apache HTTP Server 2.4.54 and earlier. *) mod_dav: Open the lock database read-only when possible. PR 36636 [Wilson Felipe <wfelipe gmail.com>, manu] *) mod_proxy_http2: apply the standard httpd content type handling to responses from the backend, as other proxy modules do. Fixes PR 66391. Thanks to JÃ©rÃ´me Billiras for providing the patch. [Stefan Eissing] *) 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_proxy_hcheck: Honor worker timeout settings. [Yann Ylavic] *) mod_http2: version 2.0.10 of the module, synchronizing changes with the gitgub version. This is a partial rewrite of how connections and streams are handled. - an APR pollset and pipes (where supported) are used to monitor the main connection and react to IO for request/response handling. This replaces the stuttered timed waits of earlier versions. - H2SerializeHeaders directive still exists, but has no longer an effect. - Clients that seemingly misbehave still get less resources allocated, but ongoing requests are no longer disrupted. - Fixed an issue since 1.15.24 that "Server" headers in proxied requests were overwritten instead of preserved. [PR by @daum3ns] - A regression in v1.15.24 was fixed that could lead to httpd child processes not being terminated on a graceful reload or when reaching MaxConnectionsPerChild. When unprocessed h2 requests were queued at the time, these could stall. See #212. - Improved information displayed in 'server-status' for H2 connections when Extended Status is enabled. Now one can see the last request that IO operations happened on and transferred IO stats are updated as well. - When reaching server limits, such as MaxRequestsPerChild, the HTTP/2 connection send a GOAWAY frame much too early on new connections, leading to invalid protocol state and a client failing the request. See PR65731 at <https://bz.apache.org/bugzilla/show_bug.cgi?id=65731>. The module now initializes the HTTP/2 protocol correctly and allows the client to submit one request before the shutdown via a GOAWAY frame is being announced. - :scheme pseudo-header values, not matching the connection scheme, are forwarded via absolute uris to the http protocol processing to preserve semantics of the request. Checks on combinations of pseudo-headers values/absence have been added as described in RFC 7540. Fixes #230. - A bug that prevented trailers (e.g. HEADER frame at the end) to be generated in certain cases was fixed. See #233 where it prevented gRPC responses to be properly generated. - Request and response header values are automatically stripped of leading and trialing space/tab characters. This is equivalent behaviour to what Apache httpd's http/1.1 parser does. The checks for this in nghttp2 v1.50.0+ are disabled. - Extensive testing in production done by Alessandro Bianchi (@alexskynet) on the v2.0.x versions for stability. Many thanks! *) mod_proxy_http2: fixed #235 by no longer forwarding 'Host:' header when request ':authority' is known. Improved test case that did not catch that the previous 'fix' was incorrect. *) mod_proxy_hcheck: hcmethod now allows for HTTP/1.1 requests using GET11, HEAD11 and/or OPTIONS11. [Jim Jagielski] *) mod_proxy: The AH03408 warning for a forcibly closed backend connection is now logged at INFO level. [Yann Ylavic] *) mod_ssl: When dumping the configuration, the existence of certificate/key files is no longer tested. [Joe Orton] *) mod_authn_core: Add expression support to AuthName and AuthType. [Graham Leggett] *) mod_ssl: when a proxy connection had handled a request using SSL, an error was logged when "SSLProxyEngine" was only configured in the location/proxy section and not the overall server. The connection continued to work, the error log was in error. Fixed PR66190. [Stefan Eissing] *) mod_proxy_hcheck: Re-enable workers in standard ERROR state. PR 66302. [Alessandro Cavaliere <alessandro.cavalier7 unibo.it>] *) mod_proxy_hcheck: Detect AJP/CPING support correctly. PR 66300. [Alessandro Cavaliere <alessandro.cavalier7 unibo.it>] *) mod_http2: Export mod_http2.h as public header. [Stefan Eissing] *) mod_md: a new directive `MDStoreLocks` can be used on cluster setups with a shared file system for `MDStoreDir` to order activation of renewed certificates when several cluster nodes are restarted at the same time. Store locks are not enabled by default. Restored curl_easy cleanup behaviour from v2.4.14 and refactored the use of curl_multi for OCSP requests to work with that. Fixes <https://github.com/icing/mod_md/issues/293>. *) core: Avoid an overflow on large inputs in ap_is_matchexp. PR 66033 [Ruediger Pluem] *) mod_heartmonitor: Allow "HeartbeatMaxServers 0" to use file based storage instead of slotmem. Needed after setting HeartbeatMaxServers default to the documented value 10 in 2.4.54. PR 66131. [JÃ©rÃ´me Billiras] *) mod_dav: DAVlockDiscovery option to disable WebDAV lock discovery This is a game changer for performances if client use PROPFIND a lot, PR 66313. [Emmanuel Dreyfus]