[tor-announce] New stable Tor releases: 0.3.5.13, 0.4.3.8, and 0.4.4.7

[Nick Mathewson <nickm@xxxxxxxxxxxxxx>]

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Source code for Tor 0.4.4.7 is now available; you can download the
source code from the download page at
https://www.torproject.org/download/tor/. Packages should be available
within the next several weeks, with a new Tor Browser coming later this month.

Also today, Tor 0.3.5.13 and 0.4.3.8 have also been released; you can
find them (and source for older Tor releases) at
https://dist.torproject.org/ . Their changelogs are here:
https://gitweb.torproject.org/tor.git/tree/ChangeLog?h=tor-0.3.5.13
https://gitweb.torproject.org/tor.git/tree/ChangeLog?h=tor-0.4.3.8

Note that the 0.4.3.x series is almost  at end-of-life: it will no
longer get supported after 15 Feb.

Changes in version 0.4.4.7 - 2021-02-03
  Tor 0.4.4.7 backports numerous bugfixes from later releases,
  including one that made v3 onion services more susceptible to
  denial-of-service attacks, and a feature that makes some kinds of
  DoS attacks harder to perform.

  o Major bugfixes (onion service v3, backport from 0.4.5.3-rc):
    - Stop requiring a live consensus for v3 clients and services, and
      allow a "reasonably live" consensus instead. This allows v3 onion
      services to work even if the authorities fail to generate a
      consensus for more than 2 hours in a row. Fixes bug 40237; bugfix
      on 0.3.5.1-alpha.

  o Major feature (exit, backport from 0.4.5.5-rc):
    - Re-entry into the network is now denied at the Exit level to all
      relays' ORPorts and authorities' ORPorts and DirPorts. This change
      should help mitgate a set of denial-of-service attacks. Closes
      ticket 2667.

  o Minor feature (build system, backport from 0.4.5.4-rc):
    - New "make lsp" command to generate the compile_commands.json file
      used by the ccls language server. The "bear" program is needed for
      this. Closes ticket 40227.

  o Minor features (compilation, backport from 0.4.5.2-rc):
    - Disable deprecation warnings when building with OpenSSL 3.0.0 or
      later. There are a number of APIs newly deprecated in OpenSSL
      3.0.0 that Tor still requires. (A later version of Tor will try to
      stop depending on these APIs.) Closes ticket 40165.

  o Minor features (crypto, backport from 0.4.5.3-rc):
    - Fix undefined behavior on our Keccak library. The bug only
      appeared on platforms with 32-byte CPU cache lines (e.g. armv5tel)
      and would result in wrong digests. Fixes bug 40210; bugfix on
      0.2.8.1-alpha. Thanks to Bernhard Übelacker, Arnd Bergmann and
      weasel for diagnosing this.

  o Minor bugfixes (compatibility, backport from 0.4.5.1-rc):
    - Strip '\r' characters when reading text files on Unix platforms.
      This should resolve an issue where a relay operator migrates a
      relay from Windows to Unix, but does not change the line ending of
      Tor's various state files to match the platform, and the CRLF line
      endings from Windows end up leaking into other files such as the
      extra-info document. Fixes bug 33781; bugfix on 0.0.9pre5.

  o Minor bugfixes (compilation, backport from 0.4.5.3-rc):
    - Fix a compilation warning about unreachable fallthrough
      annotations when building with "--enable-all-bugs-are-fatal" on
      some compilers. Fixes bug 40241; bugfix on 0.3.5.4-alpha.

  o Minor bugfixes (SOCKS5, backport from 0.4.5.3-rc):
    - Handle partial SOCKS5 messages correctly. Previously, our code
      would send an incorrect error message if it got a SOCKS5 request
      that wasn't complete. Fixes bug 40190; bugfix on 0.3.5.1-alpha.

  o Minor bugfixes (testing, backport from 0.4.5.2-alpha):
    - Fix the `config/parse_tcp_proxy_line` test so that it works
      correctly on systems where the DNS provider hijacks invalid
      queries. Fixes part of bug 40179; bugfix on 0.4.3.1-alpha.
    - Fix our Python reference-implementation for the v3 onion service
      handshake so that it works correctly with the version of hashlib
      provided by Python 3.9. Fixes part of bug 40179; bugfix
      on 0.3.1.6-rc.
    - Fix the `tortls/openssl/log_one_error` test to work with OpenSSL
      3.0.0. Fixes bug 40170; bugfix on 0.2.8.1-alpha.
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