| Privoxy 3.0.25 User Manual | +Privoxy 3.0.33 User Manual | ||||
|---|---|---|---|---|---|
| Prev | - +Prev | - - | Next | +Next | |
Privoxy 3.0.25 beta introduces - client-based tags and includes a couple of minor improvements. It will be - followed by a stable release in the near future.
- +Privoxy 3.0.33 fixes an XSS issue and 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 an new features.
+Changes in Privoxy 3.0.33 stable:
Security/Reliability:
+cgi_error_no_template(): Encode the template name to prevent XSS (cross-side 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:
-Always use the current toggle state for new requests. - Previously new requests on reused connections inherited the - toggle state from the previous request even though the toggle - state could have changed. Reported by Robert Klemme.
+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.
Fixed two buffer-overflows in the (deprecated) static pcre - code. These bugs are not considered security issues as the input - is trusted. Found with afl-fuzz and ASAN.
+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:
-Added support for client-specific tags which allow Privoxy - admins to pre-define tags that are set for all requests from - clients that previously opted in through the CGI interface. They - are useful in multi-user setups where admins may want to allow - users to disable certain actions and filters for themselves - without affecting others. In single-user setups they are useful - to allow more fine-grained toggling. For example to disable - request blocking while still crunching cookies, or to disable - experimental filters only. This is an experimental feature, the - syntax and behaviour may change in future versions. Sponsored by - Robert Klemme.
+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.
Dynamic filters and taggers now support a $listen-address - variable which contains the address the request came in on. For - external filters the variable is called $PRIVOXY_LISTEN_ADDRESS. - Original patch contributed by pursievro.
+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.
Add client-header-tagger 'listen-address'.
+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.
Include the listen-address in the log message when logging new - requests. Patch contributed by pursievro.
+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@.
Turn invalid max-client-connections values into fatal - errors.
+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.
The show-status page now shows whether or not dates before - 1970 and after 2038 are expected to be handled properly. This is - mainly useful for Privoxy-Regression-Test but could also come - handy when dealing with time-related support requests.
+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.
On Mac OS X the thread id in log messages are more likely to - be unique now.
+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.
When complaining about missing filters, the filter type is - logged as well.
+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.
A couple of harmless coverity warnings were silenced (CID - #161202, CID #161203, CID #161211).
+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.
Action file improvements:
- -Filtering is disabled for Range requests to let download - resumption and Windows updates work with the default - configuration.
+OpenSSL ssl_store_cert(): Remove pointless variable initialization.
Unblock ".ardmediathek.de/". Reported by ThTomate in #932.
+OpenSSL ssl_store_cert(): Initialize pointer with NULL instead of 0.
Documentation improvements:
- +Action file improvements:
Add FAQ entry for crashes caused by memory limits.
+Disable fast-redirects for .microsoftonline.com/.
Remove obsolete FAQ entry about a bug in PHP 4.2.3.
+Disable fast-redirects for idp.springer.com/.
Mention the new mailing lists were appropriate. As the - archives have not been migrated, continue to mention the archives - at SF in the contacting section for now.
+Disable fast-redirects for .zeit.de/zustimmung.
Note that the templates should be adjusted if Privoxy is - running as intercepting proxy without getting all requests.
+Unblock adv-archiv.dfn-cert.de/.
A bunch of links were converted to https://.
+Block requests to eu-tlp01.kameleoon.eu/.
Rephrase onion service paragraph to make it more obvious that - Tor is involved and that the whole website (and not just the - homepage) is available as onion service.
+Block requests to fpa-events.arstechnica.com/.
Streamline the "More information" section on the homepage - further by additionally ditching the link to the 'See also' - section of the user manual. The section contains mostly links - that are directly reachable from the homepage already and the - rest is not significant enough to get a link from the - homepage.
+Unblock nlnet.nl/.
Change the add-header{} example to set the DNT header and use - a complete section to make copy and pasting more convenient. Add - a comment to make it obvious that adding the header is not - recommended for obvious reasons. Using the DNT header as example - was suggested by Leo Wzukw.
+Unblock adguard.com/.
Privoxy-Log-Parser:
+Streamline the support-and-service template Instead of linking - to the various support trackers (whose URLs hopefully change - soon), link to the contact section of the user manual to increase - the chances that users actually read it.
+Highlight 'Socket timeout 3 reached: http://127.0.0.1:20000/no-filter/chunked-content/36'.
Add a FAQ entry for tainted sockets.
+Improve documentation for inactivity-detection mode.
More sections in the documentation have stable URLs now.
+Detect date changes when looking for inactivity.
FAQ: Explain why 'ping config.privoxy.org' is not expected to - reach a local Privoxy installation.
+Add a --passed-request-statistics-threshold option that can be set to get statistics for requests that + were passed.
Note that donations done through Zwiebelfreunde e.V. currently - can't be checked automatically.
+Add a "inactivity detection" mode which can be useful for debugging purposes.
Updated section regarding starting Privoxy under OS X.
+Bump version to 0.9.4.
Use dedicated start instructions for FreeBSD and - ElectroBSD.
+Only run print_intro() and print_outro() when syntax highlighting.
Removed release instructions for AIX. They haven't been - working for years and unsurprisingly nobody seems to care.
+Rephrase a sentence in the documentation.
Removed obsolete reference to the solaris-dist target.
+Highlight 'Client socket 7 is no longer usable. The server socket has been closed.'.
Updated the release instructions for FreeBSD.
+Clarify --statistics output by explicitly mentioning that the status codes sent by the server may differ + from the ones in "debug 512" messages.
Removed unfinished release instructions for Amiga OS and HP-UX - 11.
+Fix typo in the --statistics output.
Added a pointer to the Cygwin Time Machine for getting the - last release of Cygwin version 1.5 to use for building Privoxy on - Windows.
+Remove an unused variable.
Various typos have been fixed.
+Highlight 'The peer notified us that the connection on socket 11 is going to be closed'.
Infrastructure improvements:
- +Privoxy-Regression-Test:
The website is no longer hosted at SourceForge and can be - reached through https now.
+Remove duplicated word in a comment.
+regression-tests.action:
+Add fetch test for http://p.p/wpad.dat.
The mailing lists at SourceForge have been deprecated, you can - subscribe to the new ones at: https://lists.privoxy.org/
+Bump for-privoxy-version to 3.0.33 which introduced the wpad.dat support.
Migrating the remaining services from SourceForge is work in - progress (TODO list item #53).
+Add more tests for the '/send-banner' code.
+Add test for OVE-20210203-0001.
+Add a test for CVE-2021-20217.
Build system improvements:
- +uagen:
Add configure argument to optimistically redefine FD_SETSIZE - with the intent to change the maximum number of client - connections Privoxy can handle. Only works with some libcs. - Sponsored by Robert Klemme.
+Bump generated Firefox version to 91 (ESR).
+Bump version to 1.2.3.
Let the tarball-dist target skip files in ".git".
+Bump copyright.
Build system:
+Let the tarball-dist target work in cwds other than - current.
+configure: Bump SOURCE_DATE_EPOCH.
Make the 'clean' target faster when run from a git - repository.
+GNUmakefile.in: Fix typo.
Include tools in the generic distribution.
+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.
Let the gen-dist target work in cwds other than current.
+Add configure option to enable MemorySanitizer.
Sort find output that is used for distribution tarballs to get - reproducible results.
+Add configure option to enable UndefinedBehaviorSanitizer.
Don't add '-src' to the name of the tar ball generated by the - gen-dist target. The package isn't a source distribution but a - binary package. While at it, use a variable for the name to - reduce the chances that the various references get out of sync - and fix the gen-upload target which was looking in the wrong - directory.
+Add configure option to enable AddressSanitizer.
Add regression-tests.action to the files that are - distributed.
+Bump copyright.
The gen-dist target which was broken since 2002 (r1.92) has - been fixed.
+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.
Remove genclspec.sh which has been obsolete since 2009.
+configure: Remove obsolete RPM_BASE check.
Windows build system:
+Remove obsolete reference to Redhat spec file.
+Update the build script to use mbed tls version 2.6.11.
Remove the obsolete announce target which has been commented - out years ago.
+Update build script to use the final 8.45 pcre library.
Let rsync skip files if the checksums match.
+Put all the '--enable-xxx' options in the configure call together.
Privoxy-Regression-Test:
- +macOS build system:
Add a "Default level offset" directive which can be used to - change the default level by a given value. This directive affects - all tests located after it until the end of the file or a another - "Default level offset" directive is reached. The purpose of this - directive is to make it more convenient to skip similar tests in - a given file without having to remove or disable the tests - completely.
+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.
Let test level 17 depend on FEATURE_64_BIT_TIME_T instead of - FEATURE_PTHREAD which has no direct connection to the time_t - size.
+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.
Fix indentation in perldoc examples.
+Update TODO list item #184 to note that WolfSSL support will (hopefully) appear after the 3.0.34 + release.
Don't overlook directives in the first line of the action - file.
+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.
Bump version to 0.7.
+Add a warning that the socket-timeout does not apply to operations done by TLS libraries.
Fix detection of the Privoxy version now that https:// is used - for the website.
+Make documentation slightly less "offensive" for some people by avoiding the word "hell".
A quick list of things to be aware of before upgrading from earlier - versions of Privoxy:
- +A quick list of things to be aware of before upgrading from earlier versions of Privoxy:
The recommended way to upgrade Privoxy is to backup your old configuration - files, install the new ones, verify that Privoxy is working correctly and finally merge - back your changes using diff and - maybe patch.
- -There are a number of new features in each Privoxy release and most of them have to be - explicitly enabled in the configuration files. Old configuration - files obviously don't do that and due to syntax changes using old - configuration files with a new The recommended way to upgrade Privoxy is to backup your old + configuration files, install the new ones, verify that Privoxy is working + correctly and finally merge back your changes using diff and maybe + patch.
+There are a number of new features in each Privoxy release and most of + them have to be explicitly enabled in the configuration files. Old configuration files obviously don't do + that and due to syntax changes using old configuration files with a new Privoxy isn't always possible anyway.
Note that some installers remove earlier versions completely, - including configuration files, therefore you should really save any - important configuration files!
+Note that some installers remove earlier versions completely, including configuration files, therefore you + should really save any important configuration files!
On the other hand, other installers don't overwrite existing - configuration files, thinking you will want to do that - yourself.
+On the other hand, other installers don't overwrite existing configuration files, thinking you will want + to do that yourself.
In the default configuration only fatal errors are logged now. - You can change that in the debug - section of the configuration file. You may also want to enable - more verbose logging until you verified that the new Privoxy version is working as expected.
+In the default configuration only fatal errors are logged now. You can change that in the debug section of the configuration file. You may also want to enable more verbose + logging until you verified that the new Privoxy version is working as + expected.
Three other config file settings are now off by default: - enable-remote-toggle, - enable-remote-http-toggle, - and enable-edit-actions. If you - use or want these, you will need to explicitly enable them, and be - aware of the security issues involved.
+Three other config file settings are now off by default: enable-remote-toggle, enable-remote-http-toggle, and enable-edit-actions. If you use or want these, you will need to + explicitly enable them, and be aware of the security issues involved.