<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
"http://www.w3.org/TR/html4/loose.dtd">
-
<html>
<head>
<title>What's New in this Release</title>
- <meta name="GENERATOR" content=
- "Modular DocBook HTML Stylesheet Version 1.79">
- <link rel="HOME" title="Privoxy 3.0.22 User Manual" href="index.html">
+ <meta name="GENERATOR" content="Modular DocBook HTML Stylesheet Version 1.79">
+ <link rel="HOME" title="Privoxy 3.0.33 User Manual" href="index.html">
<link rel="PREVIOUS" title="Installation" href="installation.html">
- <link rel="NEXT" title="Quickstart to Using Privoxy" href=
- "quickstart.html">
+ <link rel="NEXT" title="Quickstart to Using Privoxy" href="quickstart.html">
<link rel="STYLESHEET" type="text/css" href="../p_doc.css">
- <meta http-equiv="Content-Type" content="text/html; charset=us-ascii">
+ <meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
<link rel="STYLESHEET" type="text/css" href="p_doc.css">
</head>
-
-<body class="SECT1" bgcolor="#EEEEEE" text="#000000" link="#0000FF" vlink=
-"#840084" alink="#0000FF">
+<body class="SECT1" bgcolor="#EEEEEE" text="#000000" link="#0000FF" vlink="#840084" alink="#0000FF">
<div class="NAVHEADER">
- <table summary="Header navigation table" width="100%" border="0"
- cellpadding="0" cellspacing="0">
+ <table summary="Header navigation table" width="100%" border="0" cellpadding="0" cellspacing="0">
<tr>
- <th colspan="3" align="center">Privoxy 3.0.22 User Manual</th>
+ <th colspan="3" align="center">Privoxy 3.0.33 User Manual</th>
</tr>
-
<tr>
- <td width="10%" align="left" valign="bottom"><a href=
- "installation.html" accesskey="P">Prev</a></td>
-
+ <td width="10%" align="left" valign="bottom"><a href="installation.html" accesskey="P">Prev</a></td>
<td width="80%" align="center" valign="bottom"></td>
-
- <td width="10%" align="right" valign="bottom"><a href=
- "quickstart.html" accesskey="N">Next</a></td>
+ <td width="10%" align="right" valign="bottom"><a href="quickstart.html" accesskey="N">Next</a></td>
</tr>
</table>
<hr align="left" width="100%">
</div>
-
<div class="SECT1">
- <h1 class="SECT1"><a name="WHATSNEW" id="WHATSNEW">3. What's New in this
- Release</a></h1>
-
- <p><span class="APPLICATION">Privoxy 3.0.22</span> stable is mainly a
- bug-fix release, it also has a couple of new features, though. Note that
- the first two entries in the ChangeLog below refer to security
- issues:</p>
-
+ <h1 class="SECT1"><a name="WHATSNEW" id="WHATSNEW">3. What's New in this Release</a></h1>
+ <p><span class="APPLICATION">Privoxy 3.0.32</span> fixes multiple DoS issues and a couple of other bugs. The issues
+ also affect earlier Privoxy releases.</p>
+ <p>Changes in <span class="APPLICATION">Privoxy 3.0.32</span> stable:</p>
<ul>
<li>
- <p>Bug fixes:</p>
-
+ <p>Security/Reliability:</p>
<ul>
<li>
- <p>Fixed a memory leak when rejecting client connections due to
- the socket limit being reached (CID 66382). This affected Privoxy
- 3.0.21 when compiled with IPv6 support (on most platforms this is
- the default).</p>
- </li>
-
- <li>
- <p>Fixed an immediate-use-after-free bug (CID 66394) and two
- additional unconfirmed use-after-free complaints made by Coverity
- scan (CID 66391, CID 66376).</p>
- </li>
-
- <li>
- <p>Actually show the FORCE_PREFIX value on the show-status
- page.</p>
+ <p>ssplit(): Remove an assertion that could be triggered with a crafted CGI request. Commit 2256d7b4d67.
+ OVE-20210203-0001. Reported by: Joshua Rogers (Opera)</p>
</li>
-
<li>
- <p>Properly deal with Keep-Alive headers with timeout= parameters
- If the timeout still can't be parsed, use the configured timeout
- instead of preventing the client from keeping the connection
- alive. Fixes #3615312/#870 reported by Bernard Guillot.</p>
+ <p>cgi_send_banner(): Overrule invalid image types. Prevents a crash with a crafted CGI request if Privoxy
+ is toggled off. Commit e711c505c48. OVE-20210206-0001. Reported by: Joshua Rogers (Opera)</p>
</li>
-
<li>
- <p>Not using any filter files no longer results in warning
- messages unless an action file is referencing header taggers or
- filters. Reported by Stefan Kurtz in #3614835.</p>
+ <p>socks5_connect(): Don't try to send credentials when none are configured. Fixes a crash due to a
+ NULL-pointer dereference when the socks server misbehaves. Commit 85817cc55b9. OVE-20210207-0001. Reported
+ by: Joshua Rogers (Opera)</p>
</li>
-
<li>
- <p>Fixed a bug that prevented Privoxy from reusing some reusable
- connections. Two bit masks with different purpose unintentionally
- shared the same bit.</p>
+ <p>chunked_body_is_complete(): Prevent an invalid read of size two. Commit a912ba7bc9c. OVE-20210205-0001.
+ Reported by: Joshua Rogers (Opera)</p>
</li>
-
<li>
- <p>A couple of additional bugs were discovered by Coverity Scan.
- The fixes that are not expected to affect users are not
- explicitly mentioned here, for details please have a look at the
- CVS logs.</p>
+ <p>Obsolete pcre: Prevent invalid memory accesses with an invalid pattern passed to pcre_compile(). Note
+ that the obsolete pcre code is scheduled to be removed before the 3.0.33 release. There has been a warning
+ since 2008 already. Commit 28512e5b624. OVE-20210222-0001. Reported by: Joshua Rogers (Opera)</p>
</li>
</ul>
</li>
-
<li>
- <p>General improvements:</p>
-
+ <p>Bug fixes:</p>
<ul>
<li>
- <p>Introduced negative tag patterns NO-REQUEST-TAG and
- NO-RESPONSE-TAG. They apply if no matching tag is found after
- parsing client or server headers.</p>
- </li>
-
- <li>
- <p>Add support for external filters which allow to process the
- response body with a script or program written in any language
- the platform supports. External filters are enabled with
- +external-filter{} after they have been defined in one of the
- filter files with a header line starting with "EXTERNAL-FILTER:".
- External filter support is experimental, not compiled by default
- and known not to work on all platforms.</p>
+ <p>Properly parse the client-tag-lifetime directive. Previously it was not accepted as an obsolete hash
+ value was being used. Reported by: Joshua Rogers (Opera)</p>
</li>
-
<li>
- <p>Add support for the 'PATCH' method as defined in RFC5789.</p>
+ <p>decompress_iob(): Prevent reading of uninitialized data. Reported by: Joshua Rogers (Opera).</p>
</li>
-
<li>
- <p>Reject requests with unsupported Expect header values. Fixes a
- couple of Co-Advisor tests.</p>
+ <p>decompress_iob(): Don't advance cur past eod when looking for the end of the file name and comment.</p>
</li>
-
<li>
- <p>Normalize the HTTP-version in forwarded requests and
- responses. This is an explicit RFC 2616 MUST and RFC 7230
- mandates that intermediaries send their own HTTP-version in
- forwarded messages.</p>
+ <p>decompress_iob(): Cast value to unsigned char before shifting. Prevents a left-shift of a negative value
+ which is undefined behaviour. Reported by: Joshua Rogers (Opera)</p>
</li>
-
<li>
- <p>Client 'Keep-Alive' headers are no longer forwarded. From a
- user's point of view it doesn't really matter, but RFC 2616
- (obsolete) mandates that the header is removed and this fixes a
- Co-Advisor complaint.</p>
+ <p>gif_deanimate(): Confirm that that we have enough data before doing any work. Fixes a crash when fuzzing
+ with an empty document. Reported by: Joshua Rogers (Opera).</p>
</li>
-
<li>
- <p>Change declared template file encoding to UTF-8. The templates
- already used a subset of UTF-8 anyway and changing the
- declaration allows to properly display UTF-8 characters used in
- the action files. This change may require existing action files
- with ISO-8859-1 characters that aren't valid UTF-8 to be
- converted to UTF-8. Requested by Sam Chen in #582.</p>
+ <p>buf_copy(): Fail if there's no data to write or nothing to do. Prevents undefined behaviour "applying
+ zero offset to null pointer". Reported by: Joshua Rogers (Opera)</p>
</li>
-
<li>
- <p>Do not pass rejected keep-alive timeouts to the server. It
- might not have caused any problems (we know of), but doing the
- right thing shouldn't hurt either.</p>
+ <p>log_error(): Treat LOG_LEVEL_FATAL as fatal even when --stfu is being used while fuzzing. Reported by:
+ Joshua Rogers (Opera).</p>
</li>
-
<li>
- <p>Let log_error() use its own buffer size #define to make
- changing the log buffer size slightly less inconvenient.</p>
+ <p>Respect DESTDIR when considering whether or not to install config files with ".new" extension.</p>
</li>
-
<li>
- <p>Turned single-threaded into a "proper" toggle directive with
- arguments.</p>
+ <p>OpenSSL ssl_store_cert(): Fix two error messages.</p>
</li>
-
- <li>
- <p>CGI templates no longer enforce new windows for some
- links.</p>
- </li>
-
- <li>
- <p>Remove an undocumented workaround ('HOST' header removal) for
- an Apple iTunes bug that according to #729900 got fixed in
- 2003.</p>
- </li>
- </ul>
- </li>
-
- <li>
- <p>Action file improvements:</p>
-
- <ul>
<li>
- <p>The pattern 'promotions.' is no longer being blocked. Reported
- by rakista in #3608540.</p>
+ <p>Fix a couple of format specifiers.</p>
</li>
-
<li>
- <p>Disable fast-redirects for .microsofttranslator.com/.</p>
+ <p>Silence compiler warnings when compiling with NDEBUG.</p>
</li>
-
<li>
- <p>Disable filter{banners-by-size} for
- .dgb-tagungszentren.de/.</p>
+ <p>fuzz_server_header(): Fix compiler warning.</p>
</li>
-
<li>
- <p>Add adn.speedtest.net as a site-specific unblocker. Support
- request #3612908.</p>
+ <p>fuzz_client_header(): Fix compiler warning.</p>
</li>
-
<li>
- <p>Disable filter{banners-by-size} for creativecommons.org/.</p>
+ <p>cgi_send_user_manual(): Also reject requests if the user-manual directive specifies a https:// URL.
+ Previously Privoxy would try and fail to open a local file.</p>
</li>
-
- <li>
- <p>Block requests to data.gosquared.com/. Reported by cbug in
- #3613653.</p>
- </li>
-
- <li>
- <p>Unblock .conrad./newsletter/. Reported by David Bo in
- #3614238.</p>
- </li>
-
- <li>
- <p>Unblock .bundestag.de/.</p>
- </li>
-
+ </ul>
+ </li>
+ <li>
+ <p>General improvements:</p>
+ <ul>
<li>
- <p>Unblock .rote-hilfe.de/.</p>
+ <p>Log the TLS version and the the cipher when debug 2 is enabled.</p>
</li>
-
<li>
- <p>Disable fast-redirects for .facebook.com/plugins/like.php.</p>
+ <p>ssl_send_certificate_error(): Respect HEAD requests by not sending a body.</p>
</li>
-
<li>
- <p>Unblock Stackexchange popup URLs that aren't used to serve
- ads. Reported by David Wagner in #3615179.</p>
+ <p>ssl_send_certificate_error(): End the body with a single new line.</p>
</li>
-
<li>
- <p>Disable fast-redirects for creativecommons.org/.</p>
+ <p>serve(): Increase the chances that the host is logged when closing a server socket.</p>
</li>
-
<li>
- <p>Unblock .stopwatchingus.info/.</p>
+ <p>handle_established_connection(): Add parentheses to clarify an expression Suggested by: David
+ Binderman</p>
</li>
-
<li>
- <p>Block requests for .adcash.com/script/. Reported by
- Tyrexionibus in #3615289.</p>
+ <p>continue_https_chat(): Explicitly unset CSP_FLAG_CLIENT_CONNECTION_KEEP_ALIVE if
+ process_encrypted_request() fails. This makes it more obvious that the connection will not be reused.
+ Previously serve() relied on CSP_FLAG_SERVER_CONTENT_LENGTH_SET and CSP_FLAG_CHUNKED being unset. Inspired
+ by a patch from Joshua Rogers (Opera).</p>
</li>
-
<li>
- <p>Disable HTML filters if the response was tagged as JavaScript.
- Filtering JavaScript code with filters intended to deal with HTML
- is usually a waste of time and, more importantly, may break
- stuff.</p>
+ <p>decompress_iob(): Add periods to a couple of log messages</p>
</li>
-
<li>
- <p>Use a custom redirect{} for
- .washingtonpost.com/wp-apps/imrs\.php\?src= Previously enabling
- the 'Advanced' settings (or manually enabling +fast-redirects{})
- prevented some images from being loaded properly.</p>
+ <p>Terminate the body of the HTTP snipplets with a single new line instead of "\r\n".</p>
</li>
-
<li>
- <p>Unblock "adina*." Fixes #919 reported by Morton A.
- Goldberg.</p>
+ <p>configure: Add --with-assertions option and only enable assertions when it is used</p>
</li>
-
<li>
- <p>Block '/.*DigiAd'.</p>
+ <p>windows build: Use --with-brotli and --with-mbedtls by default and enable dynamic error checking.</p>
</li>
-
<li>
- <p>Unblock 'adele*.'. Reported by Adele Lime in #1663.</p>
+ <p>gif_deanimate(): Confirm we've got an image before trying to write it Saves a pointless buf_copy()
+ call.</p>
</li>
-
<li>
- <p>Disable banners-by-size for kggp.de/.</p>
+ <p>OpenSSL ssl_store_cert(): Remove a superfluous space before the serial number.</p>
</li>
</ul>
</li>
-
<li>
- <p>Filter file improvements & bug fixes:</p>
-
+ <p>Action file improvements:</p>
<ul>
<li>
- <p>Decrease the chances that js-annoyances creates invalid
- JavaScript. Submitted by John McGowan on ijbswa-users@.</p>
+ <p>Disable fast-redirects for .golem.de/</p>
</li>
-
<li>
- <p>Let the msn filter hide 'related' ads again.</p>
+ <p>Unblock requests to adri*.</p>
</li>
-
<li>
- <p>Remove a stray '1' in the 'html-annoyances' filter.</p>
+ <p>Block requests for trc*.taboola.com/</p>
</li>
-
<li>
- <p>Prevent img-reorder from messing up img tags with empty src
- attributes. Fixes #880 reported by Duncan.</p>
+ <p>Disable fast-redirects for .linkedin.com/</p>
</li>
</ul>
</li>
-
<li>
- <p>Documentation improvements:</p>
-
+ <p>Filter file improvements:</p>
<ul>
<li>
- <p>Updated the 'Would you like to donate?' section.</p>
- </li>
-
- <li>
- <p>Note that invalid forward-override{} parameter syntax isn't
- detected until the parameter is used.</p>
- </li>
-
- <li>
- <p>Add another +redirect{} example: a shortcut for illumos
- bugs.</p>
- </li>
-
- <li>
- <p>Make it more obvious that many operating systems support log
- rotation out of the box.</p>
- </li>
-
- <li>
- <p>Fixed dead links. Reported by Mark Nelson in #3614557.</p>
- </li>
-
- <li>
- <p>Rephrased the 'Why is the configuration so complicated?'
- answer to be slightly less condescending. Anonymously suggested
- in #3615122.</p>
- </li>
-
- <li>
- <p>Be more explicit about accept-intercepted-requests's lack of
- MITM support.</p>
- </li>
-
- <li>
- <p>Make 'demoronizer' FAQ entries more generic.</p>
+ <p>Make the second pcrs job of the img-reorder filter greedy again. The ungreedy version broke the img tags
+ on: https://bulk.fefe.de/scalability/.</p>
</li>
-
- <li>
- <p>Add an example hostname to the --pre-chroot-nslookup
- description.</p>
- </li>
-
- <li>
- <p>Add an example for a host pattern that matches an IP
- address.</p>
- </li>
-
- <li>
- <p>Rename the 'domain pattern' to 'host pattern' as it may
- contain IP addresses as well.</p>
- </li>
-
- <li>
- <p>Recommend forward-socks5t when using Tor. It seems to work
- fine and modifying the Tor configuration to profit from it hasn't
- been necessary for a while now.</p>
- </li>
-
- <li>
- <p>Add another redirect{} example to stress that redirect loops
- can and should be avoided.</p>
- </li>
-
- <li>
- <p>The usual spelling and grammar fixes. Parts of them were
- reported by Reuben Thomas in #3615276.</p>
- </li>
-
- <li>
- <p>Mention the PCRS option letters T and D in the filter
- section.</p>
- </li>
-
- <li>
- <p>Clarify that handle-as-empty-doc-returns-ok is still useful
- and will not be removed without replacement.</p>
- </li>
-
+ </ul>
+ </li>
+ <li>
+ <p>Privoxy-Log-Parser:</p>
+ <ul>
<li>
- <p>Note that security issues shouldn't be reported using the bug
- tracker.</p>
+ <p>Highlight a few more messages.</p>
</li>
-
<li>
- <p>Clarify what Privoxy does if both +block{} and +redirect{}
- apply.</p>
+ <p>Clarify the --statistics output. The shown "Reused connections" are server connections so name them
+ appropriately.</p>
</li>
-
<li>
- <p>Removed the obsolete bookmarklets section.</p>
+ <p>Bump version to 0.9.3.</p>
</li>
</ul>
</li>
-
<li>
- <p>Build system improvements:</p>
-
+ <p>Privoxy-Regression-Test:</p>
<ul>
<li>
- <p>Let --with-group properly deal with secondary groups. Patch
- submitted by Anatoly Arzhnikov in #3615187.</p>
- </li>
-
- <li>
- <p>Fix web-actions target.</p>
+ <p>Add the --check-bad-ssl option to the --help output.</p>
</li>
-
<li>
- <p>Add a web-faq target that only updates the FAQ on the
- webserver.</p>
+ <p>Bump version to 0.7.3.</p>
</li>
-
+ </ul>
+ </li>
+ <li>
+ <p>Documentation:</p>
+ <ul>
<li>
- <p>Remove already-commented-out non-portable DOSFILTER
- alternatives.</p>
+ <p>Add pushing the created tag to the release steps in the developer manual.</p>
</li>
-
<li>
- <p>Remove the obsolete targets dok-put and dok-get.</p>
+ <p>Clarify that 'debug 32768' should be used in addition to the other debug directives when reporting
+ problems.</p>
</li>
-
<li>
- <p>Add a sf-shell target.</p>
+ <p>Add a 'Third-party licenses and copyrights' section to the user manual.</p>
</li>
</ul>
</li>
</ul>
-
<div class="SECT2">
- <h2 class="SECT2"><a name="UPGRADERSNOTE" id="UPGRADERSNOTE">3.1. Note
- to Upgraders</a></h2>
-
- <p>A quick list of things to be aware of before upgrading from earlier
- versions of <span class="APPLICATION">Privoxy</span>:</p>
-
+ <h2 class="SECT2"><a name="UPGRADERSNOTE" id="UPGRADERSNOTE">3.1. Note to Upgraders</a></h2>
+ <p>A quick list of things to be aware of before upgrading from earlier versions of <span class=
+ "APPLICATION">Privoxy</span>:</p>
<ul>
<li>
- <p>The recommended way to upgrade <span class=
- "APPLICATION">Privoxy</span> is to backup your old configuration
- files, install the new ones, verify that <span class=
- "APPLICATION">Privoxy</span> is working correctly and finally merge
- back your changes using <span class="APPLICATION">diff</span> and
- maybe <span class="APPLICATION">patch</span>.</p>
-
- <p>There are a number of new features in each <span class=
- "APPLICATION">Privoxy</span> 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 <span class=
+ <p>The recommended way to upgrade <span class="APPLICATION">Privoxy</span> is to backup your old
+ configuration files, install the new ones, verify that <span class="APPLICATION">Privoxy</span> is working
+ correctly and finally merge back your changes using <span class="APPLICATION">diff</span> and maybe
+ <span class="APPLICATION">patch</span>.</p>
+ <p>There are a number of new features in each <span class="APPLICATION">Privoxy</span> 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 <span class=
"APPLICATION">Privoxy</span> isn't always possible anyway.</p>
</li>
-
<li>
- <p>Note that some installers remove earlier versions completely,
- including configuration files, therefore you should really save any
- important configuration files!</p>
+ <p>Note that some installers remove earlier versions completely, including configuration files, therefore you
+ should really save any important configuration files!</p>
</li>
-
<li>
- <p>On the other hand, other installers don't overwrite existing
- configuration files, thinking you will want to do that
- yourself.</p>
+ <p>On the other hand, other installers don't overwrite existing configuration files, thinking you will want
+ to do that yourself.</p>
</li>
-
<li>
- <p>In the default configuration only fatal errors are logged now.
- You can change that in the <a href="config.html#DEBUG">debug
- section</a> of the configuration file. You may also want to enable
- more verbose logging until you verified that the new <span class=
- "APPLICATION">Privoxy</span> version is working as expected.</p>
+ <p>In the default configuration only fatal errors are logged now. You can change that in the <a href=
+ "config.html#DEBUG">debug section</a> of the configuration file. You may also want to enable more verbose
+ logging until you verified that the new <span class="APPLICATION">Privoxy</span> version is working as
+ expected.</p>
</li>
-
<li>
- <p>Three other config file settings are now off by default:
- <a href="config.html#ENABLE-REMOTE-TOGGLE">enable-remote-toggle</a>,
- <a href=
- "config.html#ENABLE-REMOTE-HTTP-TOGGLE">enable-remote-http-toggle</a>,
- and <a href=
- "config.html#ENABLE-EDIT-ACTIONS">enable-edit-actions</a>. If you
- use or want these, you will need to explicitly enable them, and be
- aware of the security issues involved.</p>
+ <p>Three other config file settings are now off by default: <a href=
+ "config.html#ENABLE-REMOTE-TOGGLE">enable-remote-toggle</a>, <a href=
+ "config.html#ENABLE-REMOTE-HTTP-TOGGLE">enable-remote-http-toggle</a>, and <a href=
+ "config.html#ENABLE-EDIT-ACTIONS">enable-edit-actions</a>. If you use or want these, you will need to
+ explicitly enable them, and be aware of the security issues involved.</p>
</li>
</ul>
</div>
</div>
-
<div class="NAVFOOTER">
<hr align="left" width="100%">
-
- <table summary="Footer navigation table" width="100%" border="0"
- cellpadding="0" cellspacing="0">
+ <table summary="Footer navigation table" width="100%" border="0" cellpadding="0" cellspacing="0">
<tr>
- <td width="33%" align="left" valign="top"><a href="installation.html"
- accesskey="P">Prev</a></td>
-
- <td width="34%" align="center" valign="top"><a href="index.html"
- accesskey="H">Home</a></td>
-
- <td width="33%" align="right" valign="top"><a href="quickstart.html"
- accesskey="N">Next</a></td>
+ <td width="33%" align="left" valign="top"><a href="installation.html" accesskey="P">Prev</a></td>
+ <td width="34%" align="center" valign="top"><a href="index.html" accesskey="H">Home</a></td>
+ <td width="33%" align="right" valign="top"><a href="quickstart.html" accesskey="N">Next</a></td>
</tr>
-
<tr>
<td width="33%" align="left" valign="top">Installation</td>
-
<td width="34%" align="center" valign="top"> </td>
-
- <td width="33%" align="right" valign="top">Quickstart to Using
- Privoxy</td>
+ <td width="33%" align="right" valign="top">Quickstart to Using Privoxy</td>
</tr>
</table>
</div>