Re: Announcing Privoxy 3.0.33 stable

The Privoxy 3.0.33 macOS installer has now been uploaded to privoxy.org and the mirror sites.

- Privoxy Developers <[email protected]>


On Thu, 9 Dec 2021, at 06:48, Fabian Keil wrote:
> Announcing Privoxy 3.0.33 stable
> --------------------------------------------------------------------
>
> Privoxy 3.0.33 fixes an XSS issue, multiple DoS issues and a
> couple of other bugs. The issues also affect earlier Privoxy releases.
> Privoxy 3.0.33 also comes with a couple of general improvements and
> new features.
>
> --------------------------------------------------------------------
> ChangeLog for Privoxy 3.0.33
> --------------------------------------------------------------------
> - Security/Reliability:
>   - cgi_error_no_template(): Encode the template name to prevent
>     XSS (cross-site scripting) when Privoxy is configured to servce
>     the user-manual itself.
>     Commit 0e668e9409c. OVE-20211102-0001. CVE-2021-44543.
>     Reported by: Artem Ivanov
>   - get_url_spec_param(): Free memory of compiled pattern spec
>     before bailing.
>     Reported by Joshua Rogers (Opera) who also provided the fix.
>     Commit 652b4b7cb0. OVE-20211201-0003. CVE-2021-44540.
>   - process_encrypted_request_headers(): Free header memory when
>     failing to get the request destination.
>     Reported by Joshua Rogers (Opera) who also provided the fix.
>     Commit 0509c58045. OVE-20211201-0002. CVE-2021-44541.
>   - send_http_request(): Prevent memory leaks when handling errors
>     Reported by Joshua Rogers (Opera) who also provided the fix.
>     Commit c48d1d6d08. OVE-20211201-0001. CVE-2021-44542.
>
> - Bug fixes:
>   - 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.
>   - 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.
>   - 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.
>   - 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.
>   - load_config(): Add a space that was missing in a log message.
>   - read_http_request_body(): Fix two error messages that used an
>     incorrect variable.
>   - 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.
>
> - General improvements:
>   - 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.
>   - 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.
>   - 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.
>   - 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@.
>   - 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.
>   - 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.
>   - 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.
>   - 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.
>   - handle_established_connection(): Slightly improve a comment.
>   - handle_established_connection(): Fix a comment.
>   - socks5_connect(): Fix indentation.
>   - handle_established_connection(): Improve an error message.
>   - create_pattern_spec(): Fix ifdef indentation.
>   - Fix comment typos.
>   - 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.
>   - chat(): Log the applied actions before deciding how to forward the 
> request.
>   - parse_time_header(): Silence a coverity complaint when building 
> without assertions.
>   - receive_encrypted_request_headers(): Improve a log message.
>   - 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.
>   - 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.
>   - 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
>   - OpenSSL generate_host_certificate(): Fix two error messsages.
>   - Improve description of handle_established_connection()
>   - OpenSSL ssl_store_cert(): Translate EVP_PKEY_EC to a string.
>   - OpenSSL ssl_store_cert(): Remove pointless variable initialization.
>   - OpenSSL ssl_store_cert(): Initialize pointer with NULL instead of 0.
>
> - Action file improvements:
>   - Disable fast-redirects for .microsoftonline.com/.
>   - Disable fast-redirects for idp.springer.com/.
>   - Disable fast-redirects for .zeit.de/zustimmung.
>   - Unblock adv-archiv.dfn-cert.de/.
>   - Block requests to eu-tlp01.kameleoon.eu/.
>   - Block requests to fpa-events.arstechnica.com/.
>   - Unblock nlnet.nl/.
>   - Unblock adguard.com/.
>
> - Privoxy-Log-Parser:
>   - Highlight 'Socket timeout 3 reached: 
> http://127.0.0.1:20000/no-filter/chunked-content/36'.
>   - Improve documentation for inactivity-detection mode.
>   - Detect date changes when looking for inactivity.
>   - Add a --passed-request-statistics-threshold option
>     that can be set to get statistics for requests that
>     were passed.
>   - Add a "inactivity detection" mode which can be useful
>     for debugging purposes.
>   - Bump version to 0.9.4.
>   - Only run print_intro() and print_outro() when syntax highlighting.
>   - Rephrase a sentence in the documentation.
>   - Highlight 'Client socket 7 is no longer usable. The server socket 
> has been closed.'.
>   - Clarify --statistics output by explicitly mentioning that
>     the status codes sent by the server may differ from the ones
>     in "debug 512" messages.
>   - Fix typo in the --statistics output.
>   - Remove an unused variable.
>   - Highlight 'The peer notified us that the connection on socket 11 is 
> going to be closed'.
>
> - Privoxy-Regression-Test:
>   - Remove duplicated word in a comment.
>
> - regression-tests.action:
>   - Add fetch test for http://p.p/wpad.dat.
>   - Bump for-privoxy-version to 3.0.33 which introduced the wpad.dat support.
>   - Add more tests for the '/send-banner' code.
>   - Add test for OVE-20210203-0001.
>   - Add a test for CVE-2021-20217.
>
> - uagen:
>   - Bump generated Firefox version to 91 (ESR).
>   - Bump version to 1.2.3.
>   - Bump copyright.
>
> - Build system:
>   - configure: Bump SOURCE_DATE_EPOCH.
>   - GNUmakefile.in: Fix typo.
>   - 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.
>   - Add configure option to enable MemorySanitizer.
>   - Add configure option to enable UndefinedBehaviorSanitizer.
>   - Add configure option to enable AddressSanitizer.
>   - Bump copyright.
>   - 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.
>   - configure: Remove obsolete RPM_BASE check.
>
> - Windows build system:
>   - Update the build script to use mbed tls version 2.6.11.
>   - Update build script to use the final 8.45 pcre library.
>   - Put all the '--enable-xxx' options in the configure call together.
>
> - macOS build system:
>   - The OSXPackageBuilder repository has been updated and
>     can be used to create macOS packages again.
>
> - Documentation:
>   - contacting: Remove obsolete reference to announce.sgml.
>   - contacting: Request that the browser cache is cleared before
>     producing a log file for submission.
>   - Sponsor FAQ: Note that Privoxy users may follow sponsor links
>     without Referer header set.
>   - newfeatures: Clarify that https inspection also allows to
>     filter https responses.
>   - developer-manual: Mention that announce.txt should be updated
>     when doing a release.
>   - config: Explicitly mention that the CGI pages disclosing the
>     ca-password can be blocked and upgrade the disclosure paragraphs
>     to a warning.
>   - 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.
>   - Update TODO list item #184 to note that WolfSSL support will
>     (hopefully) appear after the 3.0.34 release.
>   - 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.
>   - Add a warning that the socket-timeout does not apply
>     to operations done by TLS libraries.
>   - Make documentation slightly less "offensive" for some people
>     by avoiding the word "hell".
>
> -----------------------------------------------------------------
> About Privoxy:
> -----------------------------------------------------------------
>
> Privoxy is a non-caching web proxy with advanced filtering capabilities for
> enhancing privacy, modifying web page data and HTTP headers, controlling
> access, and removing ads and other obnoxious Internet junk. Privoxy has a
> flexible configuration and can be customized to suit individual needs and
> tastes. It has application for both stand-alone systems and multi-user
> networks.
>
> Privoxy is Free Software and licensed under the GNU GPLv2.
>
> Our TODO list is rather long. Helping hands and donations are welcome:
>
>   * https://www.privoxy.org/participate
>
>   * https://www.privoxy.org/donate
>
> At present, Privoxy is known to run on Windows 95 and later versions
> (98, ME, 2000, XP, Vista, Windows 7, Windows 10 etc.), GNU/Linux
> (RedHat, SuSE, Debian, Fedora, Gentoo, Slackware and others),
> Mac OS X (10.4 and upwards on PPC and Intel processors), Haiku,
> DragonFly, ElectroBSD, FreeBSD, NetBSD, OpenBSD, Solaris,
> and various other flavors of Unix.
>
> In addition to the core features of ad blocking and cookie management,
> Privoxy provides many supplemental features, that give the end-user
> more control, more privacy and more freedom:
>
>   *  Supports "Connection: keep-alive". Outgoing connections can be kept
>      alive independently from the client. Currently not available on all
>      platforms.
>
>   *  Supports IPv6, provided the operating system does so too,
>      and the configure script detects it.
>
>   *  Supports tagging which allows to change the behaviour based on client
>      and server headers.
>
>   *  Supports https inspection which allows to filter https requests.
>
>   *  Can be run as an "intercepting" proxy, which obviates the need to
>      configure browsers individually.
>
>   *  Sophisticated actions and filters for manipulating both server and
>      client headers.
>
>   *  Can be chained with other proxies.
>
>   *  Integrated browser based configuration and control utility at
>      http://config.privoxy.org/ (shortcut: http://p.p/). Browser-based
>      tracing of rule and filter effects. Remote toggling.
>
>   *  Web page filtering (text replacements, removes banners based on size,
>      invisible "web-bugs" and HTML annoyances, etc.)
>
>   *  Modularized configuration that allows for standard settings and user
>      settings to reside in separate files, so that installing updated actions
>      files won't overwrite individual user settings.
>
>   *  Support for Perl Compatible Regular Expressions in the configuration
>      files, and a more sophisticated and flexible configuration syntax.
>
>   *  GIF de-animation.
>
>   *  Bypass many click-tracking scripts (avoids script redirection).
>
>   *  User-customizable HTML templates for most proxy-generated pages (e.g.
>      "blocked" page).
>
>   *  Auto-detection and re-reading of config file changes.
>    
>   *  Most features are controllable on a per-site or per-location basis.
>
>
> Home Page: 
>    https://www.privoxy.org/
>
>   - Privoxy Developers <[email protected]>
>
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