<!--
- File : $Source: /cvsroot/ijbswa/current/doc/source/changelog.sgml,v $
+ File : doc/source/changelog.sgml
Purpose : Entity included in other project documents.
- $Id: changelog.sgml,v 2.13 2015/03/29 17:22:05 fabiankeil Exp $
-
- Copyright (C) 2013 Privoxy Developers http://www.privoxy.org/
+ Copyright (C) 2013-2021 Privoxy Developers https://www.privoxy.org/
See LICENSE.
======================================================================
user-manual
-->
-<para>
- <application>Privoxy 3.0.24</application> stable contains a couple
- of new features but is mainly a bug-fix release. Two of the fixed bugs
- are security issues (CVE requests pending) and may be used to remotely
- trigger crashes on platforms that carefully check memory accesses (most don't).
-</para>
<!--
The SGML ChangeLog can be generated with: utils/changelog2doc.pl ChangeLog
-->
-<para>
+<para>
+ <application>Privoxy 3.0.33</application> fixes an XSS issue
+ and multiple DoS issues and a couple of other bugs.
+ The issues also affect earlier Privoxy releases.
+ <application>Privoxy 3.0.33</application> also comes with
+ a couple of general improvements an new features.
+</para>
+<para>
+ Changes in <application>Privoxy 3.0.33</application> stable:
+</para>
<para>
<itemizedlist>
<listitem>
<para>
- Security fixes (denial of service):
+ Bug fixes:
<itemizedlist>
<listitem>
<para>
- Prevent invalid reads in case of corrupt chunk-encoded content.
- Bug discovered with afl-fuzz and AddressSanitizer.
+ handle_established_connection(): Skip the poll()/select() calls
+ if TLS data is pending on the server socket. The TLS library may
+ have already consumed all the data from the server response in
+ which case poll() and select() will not detect that data is
+ available to be read.
+ Fixes SF bug #926 reported by Wen Yue.
</para>
</listitem>
<listitem>
<para>
- Remove empty Host headers in client requests.
- Previously they would result in invalid reads.
- Bug discovered with afl-fuzz and AddressSanitizer.
+ continue_https_chat(): Update csp->server_connection.request_sent
+ after sending the request to make sure the latency is calculated
+ correctly. Previously https connections were not reused after
+ timeout seconds after the first request made on the connection.
+ </para>
+ </listitem>
+ <listitem>
+ <para>
+ free_pattern_spec(): Don't try to free an invalid pointer
+ when unloading an action file with a TAG pattern while
+ Privoxy has been compiled without FEATURE_PCRE_HOST_PATTERNS.
+ Closes: SF patch request #147. Patch by Maxim Antonov.
+ </para>
+ </listitem>
+ <listitem>
+ <para>
+ Establish the TLS connection with the client earlier and decide
+ how to route the request afterwards. This allows to change the
+ forwarding settings based on information from the https-inspected
+ request, for example the path.
+ </para>
+ </listitem>
+ <listitem>
+ <para>
+ Adjust build_request_line() to create a CONNECT request line when
+ https-inspecting and forwarding to a HTTP proxy.
+ Fixes SF bug #925 reported by Wen Yue.
+ </para>
+ </listitem>
+ <listitem>
+ <para>
+ load_config(): Add a space that was missing in a log message.
</para>
</listitem>
</itemizedlist>
</listitem>
<listitem>
<para>
- Bug fixes:
+ General improvements:
<itemizedlist>
<listitem>
<para>
- When using socks5t, send the request body optimistically as well.
- Previously the request body wasn't guaranteed to be sent at all
- and the error message incorrectly blamed the server.
- Fixes #1686 reported by Peter Müller and G4JC.
+ serve(): Close the client socket as well if the server socket
+ for an inspected connection has been closed. Privoxy currently
+ can't establish a new server connection when the client socket
+ is reused and would drop the connection in continue_https_chat()
+ anyway.
</para>
</listitem>
<listitem>
<para>
- Fixed buffer scaling in execute_external_filter() that could lead
- to crashes. Submitted by Yang Xia in #892.
+ Don't disable redirect checkers in redirect_url()
+ Disable them in handle_established_connection() instead.
+ Doing it in redirect_url() prevented the +redirect{} and
+ +fast-redirects{} actions from being logged with LOG_LEVEL_ACTIONS.
</para>
</listitem>
<listitem>
<para>
- Fixed crashes when executing external filters on platforms like
- Mac OS X. Reported by Jonathan McKenzie on ijbswa-users@
+ handle_established_connection(): Slightly improve a comment
</para>
</listitem>
<listitem>
<para>
- Properly parse ACL directives with ports when compiled with HAVE_RFC2553.
- Previously the port wasn't removed from the host and in case of
- 'permit-access 127.0.0.1 example.org:80' Privoxy would try (and fail)
- to resolve "example.org:80" instead of example.org.
- Reported by Pak Chan on ijbswa-users@.
+ handle_established_connection(): Fix a comment
</para>
</listitem>
<listitem>
<para>
- Check requests more carefully before serving them forcefully
- when blocks aren't enforced. Privoxy always adds the force token
- at the beginning of the path, but would previously accept it anywhere
- in the request line. This could result in requests being served that
- should be blocked. For example in case of pages that were loaded with
- force and contained JavaScript to create additionally requests that
- embed the origin URL (thus inheriting the force prefix).
- The bug is not considered a security issue and the fix does not make
- it harder for remote sites to intentionally circumvent blocks if
- Privoxy isn't configured to enforce them.
- Fixes #1695 reported by Korda.
+ socks5_connect(): Fix indentation.
</para>
</listitem>
<listitem>
<para>
- Normalize the request line in intercepted requests to make rewriting
- the destination more convenient. Previously rewrites for intercepted
- requests were expected to fail unless $hostport was being used, but
- they failed "the wrong way" and would result in an out-of-memory
- message (vanilla host patterns) or a crash (extended host patterns).
- Reported by "Guybrush Threepwood" in #1694.
+ handle_established_connection(): Improve an error message
</para>
</listitem>
<listitem>
<para>
- Enable socket lingering for the correct socket.
- Previously it was repeatedly enabled for the listen socket
- instead of for the accepted socket. The bug was found by
- code inspection and did not cause any (reported) issues.
+ create_pattern_spec(): Fix ifdef indentation
</para>
</listitem>
<listitem>
<para>
- Detect and reject parameters for parameter-less actions.
- Previously they were silently ignored.
+ Fix comment typos
</para>
</listitem>
<listitem>
<para>
- Fixed invalid reads in internal and outdated pcre code.
- Found with afl-fuzz and AddressSanitizer.
+ Add a CGI handler for /wpad.dat that returns a
+ Proxy Auto-Configuration (PAC) file.
+ Among other things, it can be used to instruct clients
+ through DHCP to use Privoxy as proxy.
+ For example with the dnsmasq option:
+ dhcp-option=252,http://config.privoxy.org/wpad.dat
+ Initial patch by Richard Schneidt.
</para>
</listitem>
<listitem>
<para>
- Prevent invalid read when loading invalid action files.
- Found with afl-fuzz and AddressSanitizer.
+ listen_loop(): When shutting down gracefully, close listening ports
+ before waiting for the threads to exit.
+ Allows to start a second Privoxy with the same config file
+ while the first Privoxy is still running.
</para>
</listitem>
<listitem>
<para>
- Windows build: Use the correct function to close the event handle.
- It's unclear if this bug had a negative impact on Privoxy's behaviour.
- Reported by Jarry Xu in #891.
+ Allow to edit the add-header action through the CGI editor by
+ generalizing the code that got added with the suppress-tag action.
+ Closes SF patch request #146. Patch by Maxim Antonov.
</para>
</listitem>
<listitem>
<para>
- In case of invalid forward-socks5(t) directives, use the
- correct directive name in the error messages. Previously they
- referred to forward-socks4t failures.
- Reported by Joel Verhagen in #889.
+ process_encrypted_request(): Improve a log message
+ The function only processes request headers and there
+ may still be unread request body data left to process.
+ </para>
+ </listitem>
+ <listitem>
+ <para>
+ read_http_request_body(): Fix two error messages that used an incorrect variable.
+ </para>
+ </listitem>
+ <listitem>
+ <para>
+ chat(): Log the applied actions before deciding how to forward the request.
+ </para>
+ </listitem>
+ <listitem>
+ <para>
+ parse_time_header(): Silence a coverity complaint when building without assertions.
+ </para>
+ </listitem>
+ <listitem>
+ <para>
+ receive_encrypted_request_headers(): Improve a log message
+ </para>
+ </listitem>
+ <listitem>
+ <para>
+ mbedTLS get_ciphersuites_from_string(): Use strlcpy() instead of strncpy().
+ Previously the terminating NUL wasn't copied which resulted
+ in a compiler warning. This didn't cause actual problems as
+ the target buffer was initialized by zalloc_or_die() so the
+ last byte of the target buffer was NUL already.
+ Actually copying the terminating NUL seems clearer, though.
+ </para>
+ </listitem>
+ <listitem>
+ <para>
+ Remove compiler warnings. "log_error(LOG_LEVEL_FATAL, ..." doesn't return
+ but apparently the compiler doesn't know that.
+ Get rid of several "this statement may fall through [-Wimplicit-fallthrough=]" warnings.
+ </para>
+ </listitem>
+ <listitem>
+ <para>
+ If the the response is chunk-encoded, ignore the Content-Length
+ header sent by the server.
+ Allows to load https://redmine.lighttpd.net/ with filtering enabled.
+ </para>
+ </listitem>
+ <listitem>
+ <para>
+ Store the PEM certificate in a dynamically allocated buffer
+ when https-inspecting. Should prevent errors like:
+ 2021-03-16 22:36:19.148 7f47bbfff700 Error: X509 PEM cert len 16694 is larger than buffer len 16383
+ As a bonus it should slightly reduce the memory usage as most
+ certificates are smaller than the previously used fixed buffer.
+ Reported by: Wen Yue
+ </para>
+ </listitem>
+ <listitem>
+ <para>
+ Don't log the applied actions in process_encrypted_request()
+ Log them in continue_https_chat() instead to mirror chat().
+ Prevents the applied actions from getting logged twice
+ for the first request on an https-inspected connection.
+ </para>
+ </listitem>
+ <listitem>
+ <para>
+ OpenSSL generate_host_certificate(): Use config.privoxy.org as Common Name
+ Org and Org Unit if the real host name is too long to get accepted by OpenSSL.
+ Clients should only care about the Subject Alternative Name
+ anyway and we can continue to use the real host name for it.
+ Reported by Miles Wen on privoxy-users@.
+ </para>
+ </listitem>
+ <listitem>
+ <para>
+ OpenSSL generate_host_certificate(): Fix two error messsages.
+ </para>
+ </listitem>
+ <listitem>
+ <para>
+ Improve description of handle_established_connection()
+ </para>
+ </listitem>
+ <listitem>
+ <para>
+ OpenSSL ssl_store_cert(): Translate EVP_PKEY_EC to a string.
+ </para>
+ </listitem>
+ <listitem>
+ <para>
+ OpenSSL ssl_store_cert(): Remove pointless variable initialization.
+ </para>
+ </listitem>
+ <listitem>
+ <para>
+ OpenSSL ssl_store_cert(): Initialize pointer with NULL instead of 0.
</para>
</listitem>
</itemizedlist>
</listitem>
<listitem>
<para>
- General improvements:
+ Action file improvements:
+ <itemizedlist>
+ <listitem>
+ <para>
+ Disable fast-redirects for .microsoftonline.com/.
+ </para>
+ </listitem>
+ <listitem>
+ <para>
+ Disable fast-redirects for idp.springer.com/.
+ </para>
+ </listitem>
+ <listitem>
+ <para>
+ Disable fast-redirects for .zeit.de/zustimmung
+ </para>
+ </listitem>
+ <listitem>
+ <para>
+ Unblock adv-archiv.dfn-cert.de/
+ </para>
+ </listitem>
+ <listitem>
+ <para>
+ Block requests to eu-tlp01.kameleoon.eu/
+ </para>
+ </listitem>
+ <listitem>
+ <para>
+ Block requests to fpa-events.arstechnica.com/
+ </para>
+ </listitem>
+ <listitem>
+ <para>
+ Unblock nlnet.nl/.
+ </para>
+ </listitem>
+ <listitem>
+ <para>
+ Unblock adguard.com/.
+ </para>
+ </listitem>
+ </itemizedlist>
+ </para>
+ </listitem>
+ <listitem>
+ <para>
+ Privoxy-Log-Parser:
<itemizedlist>
<listitem>
<para>
- Set NO_DELAY flag for the accepting socket. This significantly reduces
- the latency if the operating system is not configured to set the flag
- by default. Reported by Johan Sintorn in #894.
+ Highlight 'Socket timeout 3 reached: http://127.0.0.1:20000/no-filter/chunked-content/36'
</para>
</listitem>
<listitem>
<para>
- Allow to build with mingw x86_64. Submitted by Rustam Abdullaev in #135.
+ Improve documentation for inactivity-detection mode
</para>
</listitem>
<listitem>
<para>
- Introduce the new forwarding type 'forward-webserver'.
- Currently it is only supported by the forward-override{} action and
- there's no config directive with the same name. The forwarding type
- is similar to 'forward', but the request line only contains the path
- instead of the complete URL.
+ Detect date changes when looking for inactivity
</para>
</listitem>
<listitem>
<para>
- The CGI editor no longer treats 'standard.action' special.
- Nowadays the official "standards" are part of default.action
- and there's no obvious reason to disallow editing them through
- the cgi editor anyway (if the user decided that the lack of
- authentication isn't an issue in her environment).
+ Add a --passed-request-statistics-threshold option
+ That can be set to get statistics for requests that
+ were passed.
</para>
</listitem>
<listitem>
<para>
- Improved error messages when rejecting intercepted requests
- with unknown destination.
+ Add a "inactivity detection" mode
+ Which can be useful for debugging purposes.
</para>
</listitem>
<listitem>
<para>
- A couple of log messages now include the number of active threads.
+ Bump version to 0.9.4
</para>
</listitem>
<listitem>
<para>
- Removed non-standard Proxy-Agent headers in HTTP snipplets
- to make testing more convenient.
+ Only run print_intro() and print_outro() when syntax highlighting
</para>
</listitem>
<listitem>
<para>
- Include the error code for pcre errors Privoxy does not recognize.
+ Rephrase a sentence in the documentation
</para>
</listitem>
<listitem>
<para>
- Config directives with numerical arguments are checked more carefully.
+ Highlight 'Client socket 7 is no longer usable. The server socket has been closed.'
</para>
</listitem>
<listitem>
<para>
- Privoxy's malloc() wrapper has been changed to prevent zero-size
- allocations which should only occur as the result of bugs.
+ Clarify --statistics output
+ by explicitly mentioning that the status codes
+ sent by the server may differ from the ones in
+ "debug 512" messages.
</para>
</listitem>
<listitem>
<para>
- Various cosmetic changes.
+ Fix typo in the --statistics output
+ </para>
+ </listitem>
+ <listitem>
+ <para>
+ Remove an unused variable
+ </para>
+ </listitem>
+ <listitem>
+ <para>
+ Highlight 'The peer notified us that the connection on socket 11 is going to be closed'
</para>
</listitem>
</itemizedlist>
</listitem>
<listitem>
<para>
- Action file improvements:
+ Privoxy-Regression-Test:
<itemizedlist>
<listitem>
<para>
- Unblock ".deutschlandradiokultur.de/".
- Reported by u302320 in #924.
+ Remove duplicated word in a comment.
+ </para>
+ </listitem>
+ </itemizedlist>
+ </para>
+ </listitem>
+ <listitem>
+ <para>
+ regression-tests.action:
+ <itemizedlist>
+ <listitem>
+ <para>
+ Add fetch test for http://p.p/wpad.dat.
+ </para>
+ </listitem>
+ <listitem>
+ <para>
+ Bump for-privoxy-version to 3.0.33 which introduced the wpad.dat support.
</para>
</listitem>
<listitem>
<para>
- Add two fast-redirect exceptions for "yandex.ru".
+ Add more tests for the '/send-banner' code.
</para>
</listitem>
<listitem>
<para>
- Disable filter{banners-by-size} for ".plasmaservice.de/".
+ Add test for OVE-20210203-0001.
</para>
</listitem>
<listitem>
<para>
- Unblock klikki.fi/adv/.
+ Add a test for CVE-2021-20217.
+ </para>
+ </listitem>
+ </itemizedlist>
+ </para>
+ </listitem>
+ <listitem>
+ <para>
+ uagen:
+ <itemizedlist>
+ <listitem>
+ <para>
+ Bump generated Firefox version to 91 (ESR)
</para>
</listitem>
<listitem>
<para>
- Block requests for "resources.infolinks.com/".
- Reported by "Black Rider" on ijbswa-users@.
+ Bump version to 1.2.3
</para>
</listitem>
<listitem>
<para>
- Block a bunch of criteo domains.
- Reported by Black Rider.
+ Bump copyright
+ </para>
+ </listitem>
+ </itemizedlist>
+ </para>
+ </listitem>
+ <listitem>
+ <para>
+ Build system:
+ <itemizedlist>
+ <listitem>
+ <para>
+ configure: Bump SOURCE_DATE_EPOCH.
</para>
</listitem>
<listitem>
<para>
- Block "abs.proxistore.com/abe/".
- Reported by Black Rider.
+ GNUmakefile.in: Fix typo.
</para>
</listitem>
<listitem>
<para>
- Disable filter{banners-by-size} for ".black-mosquito.org/".
+ configure: Add another warning in case --disable-pthread is used
+ while POSIX threads are available.
+ Various features don't even compile when not using threads.
</para>
</listitem>
<listitem>
<para>
- Disable fast-redirects for "disqus.com/".
+ Add configure option to enable MemorySanitizer.
+ </para>
+ </listitem>
+ <listitem>
+ <para>
+ Add configure option to enable UndefinedBehaviorSanitizer.
+ </para>
+ </listitem>
+ <listitem>
+ <para>
+ Add configure option to enable AddressSanitizer.
+ </para>
+ </listitem>
+ <listitem>
+ <para>
+ Bump copyright
+ </para>
+ </listitem>
+ <listitem>
+ <para>
+ Add a configure option to disable pcre JIT compilation.
+ While JIT compilation makes filtering faster it can
+ cause false-positive valgrind complaints.
+ As reported by Gwyn Ciesla in SF bug 924 it also can
+ cause problems when the SELinux policy does not grant
+ Privoxy "execmem" privileges.
+ </para>
+ </listitem>
+ <listitem>
+ <para>
+ configure: Remove obsolete RPM_BASE check
</para>
</listitem>
</itemizedlist>
</listitem>
<listitem>
<para>
- Documentation improvements:
+ Windows build system:
<itemizedlist>
<listitem>
<para>
- FAQ: Explicitly point fingers at ASUS as an example of a
- company that has been reported to force malware based on
- Privoxy upon its customers.
+ Update the build script to use mbed tls version 2.6.11.
</para>
</listitem>
<listitem>
<para>
- Correctly document the action type for a bunch of "multi-value"
- actions that were incorrectly documented to be "parameterized".
- Reported by Gregory Seidman on ijbswa-users@.
+ Update build script to use the final 8.45 pcre library.
</para>
</listitem>
<listitem>
<para>
- Fixed the documented type of the forward-override{} action
- which is obviously 'parameterized'.
+ Put all the '--enable-xxx' options in the configure call together.
</para>
</listitem>
</itemizedlist>
</listitem>
<listitem>
<para>
- Website improvements:
+ Documentation:
<itemizedlist>
<listitem>
<para>
- Users who don't trust binaries served by SourceForge
- can get them from a mirror. Migrating away from SourceForge
- is planned for 2016 (TODO list item #53).
+ contacting: Remove obsolete reference to announce.sgml.
+ </para>
+ </listitem>
+ <listitem>
+ <para>
+ contacting: Request that the browser cache is cleared before
+ producing a log file for submission.
+ </para>
+ </listitem>
+ <listitem>
+ <para>
+ Sponsor FAQ: Note that Privoxy users may follow sponsor links
+ without Referer header set.
+ </para>
+ </listitem>
+ <listitem>
+ <para>
+ newfeatures: Clarify that https inspection also allows to
+ filter https responses.
+ </para>
+ </listitem>
+ <listitem>
+ <para>
+ developer-manual: Mention that announce.txt should be updated
+ when doing a release.
+ </para>
+ </listitem>
+ <listitem>
+ <para>
+ config: Explicitly mention that the CGI pages disclosing the
+ ca-password can be blocked and upgrade the disclosure paragraphs
+ to a warning.
+ </para>
+ </listitem>
+ <listitem>
+ <para>
+ Put all the requested debug options in the config file.
+ Section 11.1 of the Privoxy user manual lists all the debug
+ options that should be enabled when reporting problems or requesting support.
+ Make it easier for users to do the right thing by having all those
+ options present in the config.
+ </para>
+ </listitem>
+ <listitem>
+ <para>
+ Update TODO list item #184 to note that WolfSSL support will
+ (hopefully) appear after the 3.0.34 release
+ </para>
+ </listitem>
+ <listitem>
+ <para>
+ Update max-client-connections's description.
+ On modern systems other than Windows Privoxy should
+ use poll() in which case the FD_SETSIZE value isn't
+ releveant.
+ </para>
+ </listitem>
+ <listitem>
+ <para>
+ Add a warning that the socket-timeout does not apply
+ to operations done by TLS libraries
</para>
</listitem>
<listitem>
<para>
- The website is now available as onion service
- (http://jvauzb4sb3bwlsnc.onion/).
+ Make documentation slightly less "offensive" for some people
+ by avoiding the word "hell".
</para>
</listitem>
</itemizedlist>
projects / privoxy.git / blobdiff