| Privoxy 3.0.23 User Manual | +Privoxy 3.0.33 User Manual | ||||
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Privoxy 3.0.23 stable is a bug-fix - release, some of the fixed bugs are security issues (CVE requests - pending):
- +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:
-Fixed a DoS issue in case of client requests with incorrect - chunk-encoded body. When compiled with assertions enabled (the - default) they could previously cause Privoxy to abort(). Reported - by Matthew Daley.
+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 multiple segmentation faults and memory leaks in the - pcrs code. This fix also increases the chances that an invalid - pcrs command is rejected as such. Previously some invalid - commands would be loaded without error. Note that Privoxy's pcrs - sources (action and filter files) are considered trustworthy - input and should not be writable by untrusted third-parties.
+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.
Fixed an 'invalid read' bug which could at least theoretically - cause Privoxy to crash. So far, no crashes have been - observed.
+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.
Compiles with --disable-force again. Reported by Kay - Raven.
+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.
Client requests with body that can't be delivered no longer - cause pipelined requests behind them to be rejected as invalid. - Reported by Basil Hussain.
+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:
-If a pcrs command is rejected as invalid, Privoxy now logs the - cause of the problem as text. Previously the pcrs error code was - logged.
+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.
The tests are less likely to cause false positives.
+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:
-'.sify.com/' is no longer blocked. Apparently it is not - actually a pure tracking site (anymore?). Reported by Andrew on - ijbswa-users@.
+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.
Unblock banners on .amnesty.de/ which aren't ads.
+Add a test for CVE-2021-20217.
Documentation improvements:
- +uagen:
The 'Would you like to donate?' section now also contains a - "Paypal" address.
+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.
The list of supported operating systems has been updated.
+Update TODO list item #184 to note that WolfSSL support will (hopefully) appear after the 3.0.34 + release.
The existence of the SF support and feature trackers has been - deemphasized because they have been broken for months. Most of - the time the mailing lists still work.
+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.
The claim that default.action updates are sometimes released - on their own has been removed. It hasn't happened in years.
+Add a warning that the socket-timeout does not apply to operations done by TLS libraries.
Explicitly mention that Tor's port may deviate from the - default when using a bundle. Requested by Andrew on - ijbswa-users@.
+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.